Slashdot Mirror


Why the "NASA Tested Space Drive" Is Bad Science

StartsWithABang writes Just over a century ago, N rays were detected by over a hundred researchers and discussed in some three hundred publications, yet there were serious experimental flaws and experimenter biases that were exposed over time. Fast forward to last week, and NASA Tests Microwave Space Drive is front page news. But a quick analysis shows that it isn't theorists who'll need to struggle to explain this phenomenon, but rather the shoddy experimentalists who are making the exact same "bad science" mistakes all over again.

315 comments

  1. BLINDED BY SCIENCE !! by Anonymous Coward · · Score: 0

    Said one Thomas Dolby !!

    1. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 2, Funny

      More like blinded TO science.

      Any 2nd year physics student should be able to laugh this garbage right off a lab bench without even running an experiment. Its truly pathetic.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    2. Re:BLINDED BY SCIENCE !! by whoever57 · · Score: 5, Insightful

      Any 2nd year physics student should be able to laugh this garbage right off a lab bench without even running an experiment.

      Any good science student should be aware that our understanding of physics changes over time. Clearly this device is unlikely because it requires a change to the "laws" of physics.

      The article explains why any good scientist should be able to laugh this off based on the reported experimental results.

      --
      The real "Libtards" are the Libertarians!
    3. Re:BLINDED BY SCIENCE !! by theshowmecanuck · · Score: 1

      Actually, it was Magnus Pyke who said it. He was a presenter on one of my favourite 70s TV shows, Don't Ask Me. The PBS show Newton's Apple was pretty much an Americanized version of it.

      --
      -- I ignore anonymous replies to my comments and postings.
    4. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      No, not even. I read the original 'paper' if it can be called that. The authors couldn't even properly construct a Poynting vector. They DID admit that in order for their device to work the Law of Conservation of Momentum would have to stand aside. This is enough. While I understand the "keep an open mind" attitude there's nothing closed-minded about noting that 400 years worth of classical and modern physics, with its millions of consistent observations, has to crumble entirely in order for this one badly misconstructed hypothesis to prove true. Its not even worth testing, the thing can be dismissed out of hand without batting an eyelash. No scientist who can't do that is frankly qualified to work for NASA and they should be looking into who they need to fire for basic incompetency. Yes, its that bad.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    5. Re:BLINDED BY SCIENCE !! by Geoffrey.landis · · Score: 1

      Any 2nd year physics student should be able to laugh this garbage right off a lab bench without even running an experiment.

      And laughing this off without even running an experiment is precisely the wrong thing to do.

      Science is about replication. Replication requires doing the experiment. Or, at a minimum, not laughing at other people who do the experiment.

      Now: the actual results of the experiment are pretty minor. The results they show, first, didn't replicate the results that they were attempting to verify, second, falsify the hypothesis that they were testing, and, third, are pretty low in magnitude-- probably spurious, in my (professional*) opinion.

      The article explains why any good scientist should be able to laugh this off based on the reported experimental results.

      Exactly.

      This is the way science is done: you test stuff. You present your results. Other scientists then critique the results, point out flaws and sources of noise and bias.

      It's rather brutal, actually. But if your result holds up to the criticisms (and most don't), maybe you've pushed the boundaries of science.

      These results don't-- yet. They are not yet reporting consistent results (in that their results differ significantly from those of other researchers). They have not yet eliminated possible spurious effects.

      That's science.

      ---
      *in fact, I am a rocket scientist

      --
      http://www.geoffreylandis.com
    6. Re:BLINDED BY SCIENCE !! by Pino+Grigio · · Score: 1

      It doesn't have to "crumble entirely" any more than Newtons laws "crumbled entirely" when they were applied to the orbit of Mercury.

    7. Re:BLINDED BY SCIENCE !! by Immerman · · Score: 1

      Certainly it's worth *testing*, especially if you've had multiple semi-credible researchers claiming positive results. After all *every* law of physics we have today stands on the bones of laws that came before them. Newton's law of universal gravitation? False. Not to mention Newtons laws of absolute space and time, which had thousands of years of evidence supporting them until Einstein came along and said well, you know, if you go *really* fast maybe these don't work so well. And there's absolutely no reason to believe that today's physics will be any more permanent than the many incarnations that came before.

      As the article points out - physics is an experimental science, so long as you have repeatable experimental data it doesn't matter if it breaks every law in physics, the experiment is the final authority, and has just exposed something not completely explained by those laws, potentially opening whole new fields of physics. Consider how black body radiation, spectral lines, etc were once considered to be among the last handful of unexplained phenomena in science, and yet their eventual explanation, quantum mechanics, fundamentally transformed our understandding of the universe in ways we're still trying to wrap our collective head around.

      Of course in this case we're talking about a tiny thrust hugging the lower bounds of detectability, and detected in both the test and null device, so we're not actually seeing much evidence to question the foundations of the laws it "breaks". It it was producing a few Newtons though, something well in excess of explanations based on radiation pressure of instrumentation errors, well then it would likely be the laws themselves that are flawed, or our understanding of those laws, and we would proceed from there. After all explanations such as using a virtual plasma as reaction mass would be basically consistent with all current laws, it would simply be a matter of exploiting effects that are neither easily invoked nor particularly useful except in space.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    8. Re:BLINDED BY SCIENCE !! by LateArthurDent · · Score: 2

      Any 2nd year physics student should be able to laugh this garbage right off a lab bench without even running an experiment.

      Any good science student should be aware that our understanding of physics changes over time. Clearly this device is unlikely because it requires a change to the "laws" of physics.

      The article explains why any good scientist should be able to laugh this off based on the reported experimental results.

      The problem is that the article is saying this is bad science, when it's really bad science reporting

      NASA did the right thing. They tested something, they got weird results, they published it. The article points out the results were no different than the null control, and that's true, so clearly the supposed design of the drive is bullshit. What the article doesn't point out is that the interesting part is that neither of them should have shown any thrust. So something is going on that the experimenters don't understand, and they've published the results to find out why. Is it a measurement / equipment / methodology error? Probably, actually. But if you can't find the error yourself, you publish the results you get, and let your peers help you. Papers will be published criticizing their methodology if there are problems with it, or proposing reasons for why the measurements look like they do. It's a long shot, but maybe there is some effect actually happening which we don't understand, and papers will be published with possible theories.

      That's not bad science. It's the definition of good science. It's bad science to imply that you should ever not publish the results you get. And it's bad science reporting to look at what NASA published and incorrectly translate it to the public as, "NASA proves impossible drive"

    9. Re:BLINDED BY SCIENCE !! by Electricity+Likes+Me · · Score: 1

      The original paper is wildly ambiguous about whether they actually tested the device in a vacuum. It seems apparent from the surrounding commentary and the paper that they clearly didn't (they describe the apparatus, they never say what the actual conditions they used it in are for the experimental section).

      Which means they've proved precisely nothing. Microwaves and heat in a shaped chamber? It's just a wildly inefficient thruster.

    10. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 2

      No, that's just not true. Conservation of Momentum is a symmetry of the laws of nature. The entire mathematical edifice is built on the fact that using these symmetries we can have been able to build explanations for basically everything beyond the simplest view of classical mechanics (which itself is fraught with issues which is why we did this all in the first place). So you can't destroy the fundamental conservation laws without ripping down the whole edifice. You have to provide an equally compelling explanation for practically all of the experiments in physics done in the 20th Century. That's a huge and essentially impossible task, you're just not going to find a mathematical structure, post-hoc that fits the bill.

      Beyond that, there is the more practical consideration that this driver is simply too easy. If it works then nature finds it very easy to build reactionless drives and they should come up just by chance as natural phenomena that we should have observed already. It doesn't make sense, this thing is not reasonable.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    11. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      Again though, you cannot break Conservation of Momentum alone, and it is NOT something that can be 'tweaked'. It either works as we think it does, or all of the existing laws of physics mathematically crumble to nothing. At that point you must now POST-HOC explain the entirety of 20th Century experimental physics and do it elegantly and parsimoniously. That means you have to construct an entirely new framework, not built on the symmetry concepts that give rise to the global conservation laws you have now discarded. This is not an evolution like when Einstein created a new set of laws that incorporated the existing ones as good approximations. This is blowing it all up and starting over from scratch, except you aren't just going back to the 18th Century and starting over with all new experiments, you have to explain all the experiments that were already done and why ALL OF THEM EXCEPT THIS ONE were consistent with a now-discarded mathematical approach. It is so fantastically preposterous that no experiments need even be done. When someone says "violates conservation of momentum" you are fully justified, even obliged if you are literate in the physics, to laugh them out of the room without a hearing.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    12. Re:BLINDED BY SCIENCE !! by jheath314 · · Score: 1

      Its not even worth testing, the thing can be dismissed out of hand without batting an eyelash.

      That's a shockingly unscientific attitude from someone who presumes to lecture NASA researchers on scientific competency.

      --
      Procrastination Man strikes again!
    13. Re:BLINDED BY SCIENCE !! by Immerman · · Score: 1

      Why do you asume you cannot break Conservation of Momentum? True, we've never seen n instance of such a violation (unless this turns out to legitimately be so) but it's still a *human* law - our "best guess" as to how the universe works, not some holy fundamental Truth. Truth is not something science is concerned with, only successive approximation. And the nature of successive approximation is that occasionally you'll stumble upon something that totally uproots your understanding of the universe.

      It's incredibly arrogant to hold the belief that *today's* physical laws are "True". We already know everything that came before was eventually proven false, and can only assume that all the current laws will eventually be falsified as well.

      And no - this isn't necessarily "blowing it all up" - all it would mean is that under certain specific conditions the law of conservation of momentum may not operate entirely a we believe. And we already have things like the casmir effect that have firmly established that virtual particles can and do interact with the macroscopic world in ways that "break" aspects of conventional physics.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    14. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      No, actually it isn't. I'm a skeptic, I like to have evidence of things. I'm entirely supportive of research in areas which are not well understood, or even in areas of established science where there are valuable things left to be observed. This is just not one of those cases. This is a case where someone is saying something just as fundamental as "I'm going to drop this stone and it is going to fall upwards" it just isn't happening. We have already done MILLIONS of experiments which exclude the possibility of this one working. If it 150 years ago and someone had proposed this? I'd say "wow, interesting idea", but its not.

      There's a right and proper place for doubt and curiosity and then there's just foolishness. What a good understanding of science will get you is the ability to tell the two apart.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    15. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      You are correct. Physical Laws do not exist. Human beings observe reality and construct laws based on their observations. Conservation of Momentum is such a law. HOWEVER, the way we decide which constructs are most useful and practical is by using the most elegant and parsimonious ones. LONG EXPERIENCE has shown us that when we construct elegant and parsimonious mathematical descriptions of nature that they have a power and utility far beyond what would be expected by just chance. We find that these laws in fact apply in much more wide-ranging and powerful ways than we ever imagined. Conservation of Momentum is a VERY core piece of this elegant description. It is what is called a 'global conservation law' and it arises out of what is called a mathematical symmetry. That is a way in which the mathematics of classical mechanics (and then again in various other places in SR/GR and Relativistic Quantum Field Theory) have a self-similarity at a deep level. This symmetry has allowed us to greatly extend the utility of our math, and in EVERY SINGLE CASE this vastly increased utility has led to the successful description of a vast array of phenomena with incredible precision. This is to the point where right now today EVERY SINGLE THING YOU HAVE EVER EXPERIENCED DIRECTLY IN THE WORLD is completely explained to the limits of physical observation by existing theory. This is why we have to build 10 mile across atom-smashers to even do basic research anymore.

      Now, when you stack THAT edifice up against a theoretically flawed thruster concept that if it was true would mean all sorts of things that we have observed and incorporated in our theory would be just pure random chance VS "it's bullshit" the its bullshit just has to win.

      So yes, all of our theories and ideas can be wrong, in principle, but IN REALITY what we know today, and the mathematical structure that underpins it, is essentially unassailable. There are plenty of things we don't know. We can't say what happens in big bangs, black holes, or even for certain neutron stars and massively powerful fields of all sorts. In some very arcane technical sense some people can say "we don't understand anything at all" and they aren't 'wrong', but what we DO have is a vastly detailed and precise description of ordinary observable nature that has proven 100% consistent. In that sense some theories ARE proven, they simply aren't breakable anymore. They may prove to be approximations of reality that don't work at an event horizon or whatever, but they absolutely do describe what happens when you put a standing wave in an asymmetrical resonant cavity, and it ain't magical momentum-busting thrust.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    16. Re:BLINDED BY SCIENCE !! by Kythe · · Score: 1

      And you're probably right. On the other hand, history is littered with the dust of skeptics whose names have been forgotten, while the names of many of those they attacked are remembered. Which is as it should be: while skeptics are often right, knee-jerk skepticism is also a particularly risk-free approach to things, isn't it? These researchers will have a chance to prove their results further, and others will attempt to replicate. We'll see what happens.

      --

      Kythe
    17. Re:BLINDED BY SCIENCE !! by Wraithlyn · · Score: 1

      If I understand it correctly, they have to carefully fine-tune the frequency to achieve resonance. From the abstract:

      Manual frequency control was required throughout the test. [...] Lessons learned from test integration and operations include identification of the need to replace manual control of the resonant cavity target frequency with an automated frequency control capability.

      So I think you are greatly overstating how "easy" it would be to randomly occur in nature, it's not just "microwaves bouncing off walls".

      IF the effect is real, I suspect we will learn it doesn't really violate conservation of momentum, it only appears to. (ie, pushing off the quantum vacuum increases the net expansion of the universe or something).

      More testing should ABSOLUTELY be conducted. Even if it's not a real effect, it is worth testing until the flaw with the testing can be identified (because there is scientific value in understanding failure as well, especially one that three different teams would have to be missing).

      Until a flaw in their methodology (and an explanation for the anomalous thrust being the result of such) can be definitely proven, this is Good Science. The article is flat wrong.

      --
      "Mind, as manifested by the capacity to make choices, is to some extent present in every electron." -Freeman Dyson
    18. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      Yeah, I'm not worried in this case. The truth is that history doesn't even remember all the quacks that were just so far wrong they shouldn't even have gotten an ear, they are legion. The cases where people were outsiders but were RIGHT? They're a very select and exceedingly rare breed, its happened maybe half a dozen times in the whole history of modern science. Its not THAT uncommon in engineering, where people say "oh its impossible to build a flujiwigger" and some guy does exactly that. But he's not working against the known laws of physics, just against someone's overly unimaginative or wrong-headed impression of how they should work. My father held patents for a number of proportional flow valve designs that people said were 'impossible' to build. They were HARD and required inventing some machining techniques that never existed before, but they were quite possible. Reactionless drives just aren't in that category of the complexities of application of known principles aren't clear. Its not hard to see why a lot of people that don't know basic physics of EM can't tell the difference, but NASA scientists should know better.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    19. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      Well, we'll just have to agree to disagree, but of course everyone who called it narrow minded to say it was a waste of time will quickly forget they said that and never understand how silly it was. Meanwhile reality will pull a wet blanket over the whole sordid affair, hopefully before another dime is wasted on the whole thing. So it always goes, and such is the life of the true skeptic, you're rarely appreciated for being right. In fact nobody has ever come to me and said "yup you were right about that" even though I have yet to ever be wrong about one of these things.

      More testing is a waste of good money after bad. There's no effect. If it was this easy to grab hold of the 'vacuum energy' it would be routine. And needing a tuned resonance is no big deal, that happens naturally all the time. Just blow on a guitar string and here it sound.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    20. Re:BLINDED BY SCIENCE !! by david_thornley · · Score: 1

      Mercury's orbit isn't a fundamental principle. The Law of Conservation of Momentum is, by Noether's Theorem, is a consequence of the invariance of physical laws from place to place. (Emmy Noether put teeth into conservation laws.) This means that, if it doesn't hold, physical laws do vary over space.

      This doesn't mean the drive doesn't work, but that if it does we throw out something we've been using for a long time as a fundamental symmetry. This isn't impossible, and we've had comparable conceptual changes before, but it's going to take one heck of a lot of evidence to convince me (or an actual physicist).

      In the meantime, I'm figuring it's a measurement error, or it wasn't in a hard enough vacuum, or it's interaction with the planet's magnetic field, or something like that.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
    21. Re:BLINDED BY SCIENCE !! by Wraithlyn · · Score: 1

      This (appears to) fly in the face of accepted theory, which means it is probably the result of an error somewhere. Everybody realizes this!

      However, taking that "probably" and stating it as "definitely" does not make you wise, or a "true skeptic". It makes you dogmatic. And that is not the scientific method.

      That is why you are "wrong", even if the effect turns out to be a mistake. This perhaps explains the lack of kudos you've received in the past.

      --
      "Mind, as manifested by the capacity to make choices, is to some extent present in every electron." -Freeman Dyson
    22. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      There's no 'probably' about it though in this specific case. You have to learn enough about physics in particular to understand what is and isn't possible. Now, some of these miraculous energy machines and whatnot, some of them actually had to be checked out. Some of them maybe even still could use a bit more checking out. There are a LOT of possible outcomes lurking out there at the margins of different complex physical regimes. Its probably true that we will find some things, but reactionless drives aren't one of them. Again, you have to be able to pick the possible from the impossible.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    23. Re:BLINDED BY SCIENCE !! by Immerman · · Score: 1

      I agree, we have a vastly detailed, extremely useful model of the fundamental workings of universe refined over the course of centuries. Notice though that we said nothing about the *accuracy* of that model - it could be that what we take as elegantly simple fundamental physics is an emergent phenomena of something far more subtle and complex - well-ordered ripples on the bed of a turbulent stream. We just don't know. *Can't* know, except when that ever-so-rarely we discover some phenomena that's just not possible according to existing theory. And then we get to revise the theories - and occasionally that means replacing a simple, elegant theoretical framework with an arbitrary monstrosity like quantum mechanics, and just hoping eventually we'll reach a new understanding that makes things simple again. That's why we build billion-dollar particle accelorators - not to smash atoms, but in the hopes of smashing theories, of discovering new impossible phenomena to lead us toward discovering physics not yet dreamed of.

      Who are we to say that such extremes of the subatomic world are the *only* place where unknown mysteries await? Any number of sufficiently subtle and obscure phenomena could be hiding in plain sight, just waiting for somebody to stumble upon the right set of conditions to evoke it on a noticeable scale. And sometimes it takes some crackpot chasing a ridiculous theory far off the beaten path to stumble across something really unexpected. And sure maybe his theory is pure bunk, but if his phenomena is repeatable then he's discovered the door to some manner of new physics, even if only by falling through it ass-backward.

      And we know perfectly well that their are at the very least *huge* gaps in our understanding - I mean if our current theories are correct then everything we can see in the universe accounts for only 5% of the total contents, we are being continuously interpenetrated by some sort of strange mass-like "stuff" that only interacts gravitationally and makes up 27% of the universe, and the other 68% of the universe is some non-masslike "stuff" even stranger which causes the very fabric of space-time to steadily inflate. And we haven't the foggiest idea about what either "stuff" really is, we only know that if our theories are correct this "stuff" must exist or the universe we see couldn't.

      In this case we have now had at least three "EmDrive-inspired" engines tested by NASA - an EmDrive a while back, plus these two - the Cannae and null-Cannae (which I hear is still a valid EmDrive design), and all three have been measured to generate unexplained thrust, while the resistive experimental control loads did not. Sure, most such hints of new physics will prove to be false leads, but every now and then one of them opens the door to something new and wonderful.

      "Cold Fusion" is another such tantalizing phenomena - nobody has come up with a reliably repeatable reaction, much less with a theory that would explain how such an impossible reaction could occur (much-er less how it could happen without cooking everyone in the room). And yet despite the mainstream infatuation and eventual dismay and derision, 100s of respectable researchers around the world have duplicated the experiments and measured excess heat and elemental transmutation from experiments so unreliable that only charlatans and crackpots are claiming to have managed to do anything remotely useful with them. Could they all be deluding themselves? Perhaps - many hundreds more were unable to duplicate the results after all, but the only way we'll ever discover new physics that don't involve bestowing the mass-energy of a baseball on a single electron is if we actually explore other avenues as well. As such, derision of those who dedicate some measure of their time and energy to such exploration is unbecoming of a scientist.

      Even those scientifically club-handed crackpots chasing insane theories in utterly improbable directions are doing a valuable service to the cause. That's not to say we should be invitin

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    24. Re:BLINDED BY SCIENCE !! by Pino+Grigio · · Score: 1

      It doesn't matter. IF something disagrees with it, it's wrong. That's really all you need to know. Now it's more likely that what's going on here is an error or some kind of mistake in the set-up of the apparatus, but the idea "we've built our edifice on top of this principle so it can't be wrong" is anti-science and horrendously arrogant.

    25. Re:BLINDED BY SCIENCE !! by Keith+Henson · · Score: 1

      A simple thought experiment will tell you that if this thing works as stated, it's a source of free energy. I was amused by a post from a power satellite fan saying that the thing could be used to get parts from LEO to GEO to make power satellites economical.

      It might make stuff cheaper to move in space, but the near free energy these things can generate eliminates the market for energy from space.

      --
      End MGM. Get prospective parents of boys to Google: Men do complain
    26. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      Yeah, I know, I get your drift. We just have to agree to disagree. I think if you got a bit more into the guts of both classical and modern physics you'd start to agree with me. QM for instance is NOT a 'monstrosity', its a beautifully elegant mathematical construct. And it fits TOO WELL, nothing is going to displace it. What we need is research on how to sort through the various proposals to extend QM and GR, not ignorant snipe hunts for non-existent phenomena. Learn some of the math, learn more about how these theories work, you'll come to understand how powerful and generalized they really are, and how simple they are in essence.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    27. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      Yes, but I think a lot of you fail to comprehend the degree of that 'more likely'. Its something like 10^100th power to one odds against all of physics being wrong. I don't have to check that out, I can dismiss it. Reality agrees with me, not with the reactionless thruster people. They need to go back to school and learn to use Maxwell's equations right.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    28. Re:BLINDED BY SCIENCE !! by Pino+Grigio · · Score: 1

      I am not a funding agency. Whether I apply 10^100th power to one odds is neither here nor there.

    29. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      Well, I have nothing to say about it if you want to do some research its your money, do what you want. Its a free country. For myself I'd vote not to have NASA funds spent on such things when there are good solid scientifically defensible lines of research just begging to have some funds all over the place. Plasma sailing, solar sails, better ion drives, magnetohydrodynamic (VASIMIR, etc) drivers, and 100 other things. Heck, work on a warp drive if you must do something pie-in-the-sky, at least its not outright impossible on the face of it. There's just a lot of stuff to work on and little money, so I don't want to spend PUBLIC money on ridiculously unlikely things.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    30. Re:BLINDED BY SCIENCE !! by Immerman · · Score: 1

      Oh, no argument that QM fits the data beautifully - the problem is that it's jam-packed with completely arbitrary constants. String theory and some of the other highly speculative explanations offer the tantalizing promise of "beautifying" it again, and perhaps one day someone will come up with a testable prediction. Until then we've just got an ugly kludge that happens to fit the data really, really well while telling us absolutely nothing about the underlying cause. As I recall it doesn't even offer any explanation for a number of well-established phenomena such as gravity. That's a situation that practically screams "ugly".

      Meanwhile among the top theoreticians in the field there's increasing acceptance (or at least non-dismissal) for theories such as the universe being a holographic projection of the event horizon of a black hole, the mathematics of which are also completely consistent with all observed phenomena while suggesting that entirely new phenomena unbound by the limits of four-dimensional spacetime may also be possible - for example what would be the implications of a collision of some "metaverse" object with our event horizon? I would assume you'd get an *extremely* non-localized event with no apparent cause.

      >not ignorant snipe hunts for non-existent phenomena
      How do you know they don't exist until you've looked for them? You're engaging in circular reasoning, and assuming they don't exist simply because they have not yet been discovered. Certainly non-existence is a perfectly reasonable assumption for the non-discovery, but it is just that: an assumption. Given anything short of 100% accurate and comprehensive observations it is also reasonable to assume that at least some existing phenomena have never been observed. And not being gods I'm disinclined to credit humanity with 100% accurate observations, while any claim of comprehensiveness is clearly laughable.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    31. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      I don't really disagree with you. I think QM isn't PARTICULARLY fraught with constants which it doesn't explain though. Classical Newtonian mechanics has plenty of them as well. There are constants galore in classical electrodynamics, etc. I share everyone's belief that there are some sort of 'more fundamental' physics which 'clean up' these things, but we cannot be sure. No absolute rule says that there are no arbitrary constants, and if we reduce the number to only 1 then in effect we still haven't explained ANYTHING because our theory will base EVERYTHING else on that one. So you have to ask what really is the value of a theory? Its only use is practical, as a predictor of things. In that sense what we have is quite good, though not perfect. The diameters of protons are still being argued about, as are a number of other fairly basic things. Our value for G is still not as good as we'd like, etc.

      The thing about all these 'theories of everything' is they EXTEND what we already know. None of them proposes things like violations of Conservation of Momentum. If they do allow for us to observe that happening then they've also got some other way to extend these conservation laws that we should be able to test. Honestly, while I can't possibly know the potential ramifications of all the various permutations of TOEs that are out there, I don't believe any of the ones that are considered likely or 'on the right path' would allow for the type of violation that a reactionless drive would require. In any case I'd just want to see a much more convincing mathematical basis that touched on how one of these theories would allow for reactionless thrust before I thought it was at all worth looking into.

      Its not circular reasoning to expect some phenomena to not exist. MANY, in fact the vast majority, of possible phenomena do not exist. The ones that DO exist have UNIVERSALLY proven to exhibit certain characteristics. Universally, that's IN ALL CASES. Its not 'circular reasoning' to say that because some hypothesized phenomenon doesn't exhibit those characteristics it doesn't exist. That's just using your plain old common sense and basic deductive reasoning. Science has to operate on a basis of deduction and inference because otherwise you can't tell what to believe or not believe and you would literally have to go around testing every ridiculous idea. What if I send NASA a paper that shows how pink unicorns can carry your spaceship to Atlantis without using any power at all? Do they have to build a unicorn harness to decide this is ridiculous? Of course not. This is in the same category, its ridiculous and there's no reason to expect it would work thus no reason to test it. Its really that simple. You can wave your hands all you want about TOEs and maybe we don't know everything but we don't have to know everything to use fekking common sense.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    32. Re: BLINDED BY SCIENCE !! by Anonymous Coward · · Score: 0

      What does common sense or deductive reasoning have to do with science!? If anything, the insanity of this existing points to a quantum effect, where all is insanity and *not a single thing is understood*, just some equations that curve for well. If you disagree with this, you need to go watch the Feinman lectures again.

    33. Re:BLINDED BY SCIENCE !! by Immerman · · Score: 1

      Okay, two things:

      One: I would be *very* surprised if this thruster truly violated conservation of momentum, as you say that's a fairly foundational thing. I would be much less surprised however if it only *appeared* to violate conservation of momentum by pushing against quantum vacuum, dark matter, the fabric of space-time, or something else entirely whose nature and interaction with "normal" matter is poorly understood or completely unexpected. And I would fully expect such a (working) device to be derided by the establishment as impossible until it was thoroughly proven to actually generate anomalous thrust, at which point many, many smart people would start trying to figure out WTF was really going on.

      Two: I think you're not giving enough credit to past researchers. Until somebody noticed the anomalous exposure of some film that had been left in the same drawer as a mineral sample, nobody had any reason to expect the existence of radioactive decay - it was in fact impossible according to the then-current theories. That discovery shattered atomic theory (atom literally means indivisible) and opened whole new fields of science. Imagine the derision they would have faced if instead of only requiring some film and a mineral sample, duplicating the key phenomena required tens of thousands of dollars of equipment and testing apparatus. Nobody would have wasted their resources trying to duplicate such an obviously impossible phenomena, and nuclear physics might never have been born.

      >Its not circular reasoning to expect some phenomena to not exist.
      Certainly not. It is however circular reasoning to extend that reasoning to conclude that NO unknown phenomena exist. And unknown phenomena will, by definition, appear to break the well-understood laws of physics, at least until the principles behind them are understood. And that does occasionally involve completely uprooting the existing laws, such as relativity did to Newtonian mechanics, which are now only kept around as an approximation that is accurate enough for most purposes - incidentally also a great example of simple, elegant physics being replaced by something far more complex and counter-intuitive. The universe is after all under absolutely no obligation to make sense to us, making sense of things is what *we* strive to do, the universe only offers an occasional hint of untapped mysteries if we poke it just right.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    34. Re:BLINDED BY SCIENCE !! by Immerman · · Score: 1

      Correction:
      Certainly not. It is however circular reasoning to extend that reasoning to conclude that NO unknown phenomena exist and thus refrain from looking for them, and dismiss them as impossible if/when found

      When making the accusation it does kinda help to actually close the circle...

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    35. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      Okay, two things:

      One: I would be *very* surprised if this thruster truly violated conservation of momentum, as you say that's a fairly foundational thing. I would be much less surprised however if it only *appeared* to violate conservation of momentum by pushing against quantum vacuum, dark matter, the fabric of space-time, or something else entirely whose nature and interaction with "normal" matter is poorly understood or completely unexpected. And I would fully expect such a (working) device to be derided by the establishment as impossible until it was thoroughly proven to actually generate anomalous thrust, at which point many, many smart people would start trying to figure out WTF was really going on.

      Yeah, I'm exceedingly dubious. If any of these kinds of mechanisms was so easily accessed then its very VERY unlikely we haven't seen it before. Not only that but this sort of interaction would almost surely be only one of a CLASS of interactions of various sorts. Also I don't think you can cheat by pushing against 'vacuum energy' (who's existence and nature are highly dubious) or other non-material things. I'm not really facile enough with GR, and I'm not sure ANYONE is to be frank, to say exactly what might or might not be allowed absolutely in theory, but it seems like a cheat to me, and nature isn't very fond of cheats. I think momentum will be conserved in its classical sense and I don't think any other sort of conservation suffices.

      Two: I think you're not giving enough credit to past researchers. Until somebody noticed the anomalous exposure of some film that had been left in the same drawer as a mineral sample, nobody had any reason to expect the existence of radioactive decay - it was in fact impossible according to the then-current theories. That discovery shattered atomic theory (atom literally means indivisible) and opened whole new fields of science. Imagine the derision they would have faced if instead of only requiring some film and a mineral sample, duplicating the key phenomena required tens of thousands of dollars of equipment and testing apparatus. Nobody would have wasted their resources trying to duplicate such an obviously impossible phenomena, and nuclear physics might never have been born.

      But you have to understand how far less developed high energy physics was at that time. VERY many experiments had never been done, so entire fields of possible phenomena were unknown. They couldn't 'balance the books' in even the simplest way, so they really didn't understand what they were looking at. Today we DO balance the books. We can analyze atomic and subatomic interactions and tell exactly what energy is going in and out, and in what forms. Its not an analogous situation.

      >Its not circular reasoning to expect some phenomena to not exist.
      Certainly not. It is however circular reasoning to extend that reasoning to conclude that NO unknown phenomena exist. And unknown phenomena will, by definition, appear to break the well-understood laws of physics, at least until the principles behind them are understood. And that does occasionally involve completely uprooting the existing laws, such as relativity did to Newtonian mechanics, which are now only kept around as an approximation that is accurate enough for most purposes - incidentally also a great example of simple, elegant physics being replaced by something far more complex and counter-intuitive. The universe is after all under absolutely no obligation to make sense to us, making sense of things is what *we* strive to do, the universe only offers an occasional hint of untapped mysteries if we poke it just right.

      Well, when I claim that no unknown phenomena exist, then your argument is relevant, but since I haven't its really not...

      I disagree that unknown phenomena will appear to break anything. Does the Higg's appear to break anything? No, it doesn't. Neither does Dark Matter, etc etc etc. They aren't entirely un

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    36. Re:BLINDED BY SCIENCE !! by Immerman · · Score: 1

      The Casimir effect is generally considered to be strong supporting evidence of the existence of virtual particles and their ability to interact with normal matter, and it seems to me that if they can bounce off metal plates then they can potentially interact in other ways as well. And I've heard a few respected potential solutions to various singularity-related paradoxes that presume the ability to transfer momentum to "the universe". Seems hand-wavy to me as well, but if the top theoreticians consider it worthy of conversation I'm inclined to believe it wouldn't break anything too badly.

      Yes, today we've explained almost everything we've observed - except for the fact that according to our theories the universe couldn't possibly exist in it's current state unless 95% of it is stuff we've never seen, and whose necessary properties are improbable to the point of ridiculousness. And of course Dark Matter and Dark Energy don't appear to break anything - they're openly accepted as theoretical kludges whose properties have been explicitly specified in order to make the universe we see possible under the accepted laws. Their acceptance is an open declaration that there are, at the very minimum, gaping holes in our understanding of physics, to the tune of the vast majority of the stuff in the universe. They are "Dark" not because they're not emitting light, but because they're total unknowns - much like Africa was "The Dark Continent".

      As for the early radiation experiments - of *course* many of the experiments hadn't been done yet - before the discovery of radioactive decay and the accompanying implication that atomic nuclei were mutable there was no reason to believe there was even a field there to experiment on. Maybe someone would have eventually tried to slam two ion streams into each other at ridiculous speeds just to see what would happen, but what would be the point? An atom-smasher is an awfully expensive piece of equipment to build without the expectation of any particular results. What makes you so certain that there aren't still other totally unexpected phenomena lurking just a happy accident away, waiting to open whole new fields of experimentation? We're combining structured energies in ways that just don't happen in nature - if there's bizarre corner cases to be found you wouldn't necessarily expect them to reveal themselves in chaotic astronomical events, nor would something like this horribly low thrust-per-watt effect be expected to be harnessed by biological systems and reveal itself there - at least not on a planet where you have so much convenient matter to push against far more efficiently.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    37. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      The Casimir Effect doesn't conflict with any of existing physics. Its a consequence of renormalization, a process that was developed in the 1960's by Feynman et al. Its quite interesting that the 'book keeping' has a real physical effect. It tells us that the theory really is not just an arbitrary description, but that there's some deeper correspondence between theory and reality. The point is The Casimir Effect doesn't 'point to something new', it is just telling us that yes indeed the vacuum exists. That in no way implies that it can be used to subvert basic laws of physics. Casimir doesn't imply anything about momentum at all.

      There's nothing 'improbable to ridiculous' about dark energy and dark matter. They are perfectly reasonable and don't actually change our overall view of the basic story of the Universe at all. They don't undermine the big bang, they explain some observations about what happens later and some of the characteristics of the CMB, that's all. Now, there's clearly going to be new/extended theories required to explain dark matter. Dark Energy, it looks like its just a 'cosmological constant', which begs some questions about what exactly is the cosmos and how does it exist, but its not clear that we need to explain the value of this number to understand the physics of THIS universe. Nor is there any implication that this means there's some physics that would allow an ordinary asymmetrical oscillator to generate reactionless thrust. I don't believe that DM/DE mean there are 'gaping holes', just that there is physics that we haven't codified yet and it will be compatible with the existing physics just like GR is compatible with classical mechanics. Anything that was impossible in CM is also impossible in GR.

      I'm sure there ARE unexpected phenomena, but they won't cause massive flaming violations of basic conservation laws with trivial ease. If they DO allow for such violations they will be at event horizons or the beginning of time, etc. They won't be significant effects that show up in a simple tuned driver that doesn't happen to be symmetrical. I just don't find that to be plausible at all. Unexpected phenomena and new theories WILL LEAVE CONSERVATION OF MOMENTUM INTACT. I'm sure of that to a very high degree of certainty. Just like an 18th Century cartographer was sure there was no land bridge from Africa to South America even those his map of the interior of Africa was a big blank with a few hazy rumors drawn on it. Its just that kind of a thing.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    38. Re:BLINDED BY SCIENCE !! by Wraithlyn · · Score: 1

      “Some years ago I had a conversation with a layman about flying saucers — because I am scientific I know all about flying saucers! I said “I don’t think there are flying saucers’. So my antagonist said, “Is it impossible that there are flying saucers? Can you prove that it’s impossible?” “No”, I said, “I can’t prove it’s impossible. It’s just very unlikely”. At that he said, “You are very unscientific. If you can’t prove it impossible then how can you say that it’s unlikely?”

      But that is the way that is scientific. It is scientific only to say what is more likely and what less likely, and not to be proving all the time the possible and impossible.

      - Richard Feynman

      --
      "Mind, as manifested by the capacity to make choices, is to some extent present in every electron." -Freeman Dyson
    39. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      Like I said, exceedingly unlikely, very very exceedingly unlikely. Spend the money on better bets.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
    40. Re:BLINDED BY SCIENCE !! by Wraithlyn · · Score: 1

      No, that is not that you've been saying in this thread. Not at all.

      Your previous post literally starts "There's no 'probably' about it", goes on to talk about understanding "what is and isn't possible", and ends with "you have to be able to pick the possible from the impossible".

      Now you say, "Like I said, exceedingly unlikely"? Give me a break.

      And if you have a "better bet" than something replicated by 3 independent teams, I'm sure NASA would be all ears. I really don't understand your strenuous objection to more testing to prove/disprove the effect. As I've said multiple times, even if there is a flaw in the testing there is scientific value in understanding failure. But you keep repeating your same argument without actually addressing any of these points, so we will have to agree to disagree.

      --
      "Mind, as manifested by the capacity to make choices, is to some extent present in every electron." -Freeman Dyson
    41. Re:BLINDED BY SCIENCE !! by Giant+Electronic+Bra · · Score: 1

      when you are dealing with 'odds' on the order of 10^100th power against something there's no real point in calling it odds anymore. Nothing is 'certain' if you can't call that sort of thing certain. I'm simply trying to demonstrate that yes indeed I can argue the argument from your perspective as well. It really doesn't matter. I can say "we know for certain that Conservation of Momentum is never violated, period" or I can say "the vast number of observations which ONLY fit a mathematical model that included inviolable Conservation of Momentum makes the probability of its violation too low to worry about", its the same thing when the odds are as remote as I've already stated. So I don't find there to be any contradictions in my position, but I probably didn't make that clear.

      Is there really scientific value in finding the flaw in the experiment? Lots of people have already suggested very mundane ways the experiment appears ON THE FACE OF IT to be flawed. Ways that would involve nothing new at all, just garden variety scientific crappy experiment design coupled with a fondness for ridiculous projects just because they offer some tantalizing revolution. Its POSSIBLE when observing anything to stumble upon some sort of useful knowledge. This is however just as likely if you were say working on Solar Sails, which are a technology that needs a LOT of basic work still but which we know operate according to established principles. I don't see anything to indicate to me that SS experiments wouldn't be a better use of NASA's limited funds. The WORST CASE is they add to our ability to build a solar sail, best case they might lead to some sort of interesting new science.

      Again, I appreciate the scientific endeavor and the value of turning over many different stones, but its best to turn over stones in the most fertile areas. Since we can't do every possible experiment we can think of we should do GOOD experiments, not bad ones.

      --
      "Malo periculosam, libertatem quam quietam servitutem." -- Jefferson
  2. They created a giant electro-magnet??? by Anonymous Coward · · Score: 0

    it really wants to dock with that nearest metallic object on your lab bench....

  3. Skeptics. by Anonymous Coward · · Score: 5, Funny

    Have they accounted for the presence of skeptics during the experiments? That is likely the cause of any anomalies.

  4. Space Drive or Global Warming? by mveloso · · Score: 0, Troll

    Wait, is this guy talking about space drives or global warming?

    FTA:

    1. The magnitude of these effects varied tremendously from experiment to experiment.
    2. The threshold of measurement—the difference between a detection and a non-detection—was always extremely close to the actual claimed detection.
    3. Many attempts at confirming the experiments by some of the leading scientists of the day, including Lord Kelvin, Heinrich Rubens and Robert Wood, all produced null results.
    4. And finally, even if you restricted your data sets to the positive the experimental results, their claims were inconsistent with one another. //endtroll

    1. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 5, Informative

      Wait, is this guy talking about space drives or global warming skeptics?

      FTA:

      1. The magnitude of these effects varied tremendously from experiment to experiment.
      2. The threshold of measurement—the difference between a detection and a non-detection—was always extremely close to the actual claimed detection.
      3. Many attempts at confirming the experiments by some of the leading scientists of the day, including Lord Kelvin, Heinrich Rubens and Robert Wood, all produced null results.
      4. And finally, even if you restricted your data sets to the positive the experimental results, their claims were inconsistent with one another. //endtroll

      FTFY

    2. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 5, Funny

      Just because you can't prove global warming is happening doesn't mean that it isn't. The science behind it is settled since over 90% of the scientists voted that it is happening. You can't disagree with it without being anti-science because of that.

    3. Re:Space Drive or Global Warming? by Smallpond · · Score: 5, Insightful

      Sorry. Science doesn't work by votes.

    4. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 0

      It does though.

    5. Re:Space Drive or Global Warming? by radtea · · Score: 4, Informative

      Except none of your points applies to climate change.

      The effect is robust: there was a whole independent project to determine if the thermodynamically meaningless "global average temperature" is increasing. It is: http://www.bbc.com/news/scienc...

      The threshold of measurement is around 0.5 C for a single station, and we have an effect that is about 1 C over the past 100 years. Not as big a margin as one would like, but difficult to ignore. And growing.

      No one has produced any results that show the instrumental temperature record in the past century is not real. There are debates about causes, but the reality of the phenomenon is not in doubt.

      Everyone who has looked at the question agrees that there is about a 1.6 W/m**2 addition to the Earth's heat budget from anthropogenic CO2, so clearly when taking the "positive cases" there is still good agreement.

      There are large and legitimate areas of disagreement with regard to climate change (far more than the moron, anti-science, "the science is settled crowd" would have you believe) but the basic phenomenon, unlike the EMDrive, is not just consistent with but actually required by the laws of physics.

      Finally: the summary is terrible, even by /. standards. The article does not point out any errors in the experiments. Rather it points out that reporters have been lying about the experiments, pure and simple. That is not the fault of the scientists, who honestly reported their null results.

      --
      Blasphemy is a human right. Blasphemophobia kills.
    6. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 4, Insightful

      > It does though.

      So the earth really was flat for awhile?

    7. Re:Space Drive or Global Warming? by Applehu+Akbar · · Score: 2

      The difference is that the space drive hypothesis is still falsifiable. NASA needs to adjust the hypothesis description so that both the presence or absence of any quantum thrust is proof of it.

    8. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 0

      Except that it doesn't. One single experimenter can formulate an experiment which disproves some previously held notion. One person. The rest is just verification, but the original experimenter is responsible for the shift. Anyone can do the verification. Simply denying that something happened or didn't happen by consensus vote isn't enough to change reality itself.

    9. Re:Space Drive or Global Warming? by Deadstick · · Score: 1

      So the earth really was flat for awhile?

      Would you please list four or five scientists who claimed it was, more recently than about 500 BC when it was measured to 10% precision? Or did you buy that Columbus tale they taught you in fifth grade?

    10. Re:Space Drive or Global Warming? by richlv · · Score: 1

      Finally: the summary is terrible, even by /. standards.

      samzenpus. i even bothered to find a way to hide him for my logged-in account, but unfortunately i can't just make him disappear for my anonymous visits, which is how i ended up here

      --
      Rich
    11. Re:Space Drive or Global Warming? by Spazmania · · Score: 2

      So the earth really was flat for awhile?

      Correct! And until the 1600's, the universe revolved around the Earth. And while politicians can't repeal the law of gravity, scientists can! Isn't that cool?

      --
      Moderating "-1, Disagree" is simple censorship. Have the guts to post your opinion.
    12. Re:Space Drive or Global Warming? by Spazmania · · Score: 2

      The difference is that the space drive hypothesis is still falsifiable.

      More than falsifiable. The NASA experiment demonstrated that the hypothesis was false: the control experiment got the same results.

      We're left with either an experimental error which, if corrected, would move the result into the error band or we're left with a real effect for which we don't yet have a satisfactory explanation.

      N-rays started this way but so did relativity: the Michelson Morley experiments and their predecessors found a real effect of light which had a lot of quack theories explaining it until Einstein came along and figured it out.

      --
      Moderating "-1, Disagree" is simple censorship. Have the guts to post your opinion.
    13. Re:Space Drive or Global Warming? by I'm+New+Around+Here · · Score: 1

      One of Isaac Asimov's short stories told how a guy made a photon pause. It ended the universe as we know it.

      --
      If you think I voted for Trump because of this post, you're wrong. I voted for Dr. Jill Stein of the Green Party. Again.
    14. Re:Space Drive or Global Warming? by Namarrgon · · Score: 2

      The verification is crucial though. What happens when two scientists claim they can verify a hypothesis, and two thousand scientists say they cannot?

      Either two thousand scientists have screwed up badly, or just two have. Which is more likely? Lacking the skills, time & equipment to verify it yourself, who are you going to believe?

      A single person can come up with a major paradigm shift that overturns our old models - but not when their results can't be reliably verified, and certainly not when their claims require simply ignoring decades of observations to the contrary.

      --
      Why would anyone engrave "Elbereth"?
    15. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 0

      There are large and legitimate areas of disagreement with regard to climate change (far more than the moron, anti-science, "the science is settled crowd" would have you believe) but the basic phenomenon, unlike the EMDrive, is not just consistent with but actually required by the laws of physics.

      True, but the kind of warming predicted by basic, known physics is pretty moderate and wouldn't be much of a problem by itself. Furthermore, we don't even know how the regular, massive swings in global temperature happen.

      Finally: the summary is terrible, even by /. standards. The article does not point out any errors in the experiments.

      That's probably because the article is a sh*tty, sensationalist, and poorly written as the journalism it purports to criticize.

    16. Re:Space Drive or Global Warming? by Spazmania · · Score: 1

      The threshold of measurement is around 0.5 C for a single station, and we have an effect that is about 1 C over the past 100 years. Not as big a margin as one would like, but difficult to ignore. And growing.

      But... that's even smaller than the ratio versus the threshold of measurement the fellow in this article claims implied experimenter bias and bad science.

      The "test" performed at NASA was sensitive to a minimum thrust threshold of about 10-to-15 microNewtons, and the "positive result" claimed detection of somewhere between 30-to-50 microNewtons of thrust.

      --
      Moderating "-1, Disagree" is simple censorship. Have the guts to post your opinion.
    17. Re:Space Drive or Global Warming? by fyngyrz · · Score: 2

      ...a guy made a photon pause. It ended the universe as we know it.

      Wait, you're saying a photon pause somehow culminated in the PATRIOT act?

      --
      I've fallen off your lawn, and I can't get up.
    18. Re:Space Drive or Global Warming? by sg_oneill · · Score: 1

      Not to mention that there is a tonne more datasources than just weather stations.

      But more to the point climate science has tens, possibly hundreds of thousands of scientists , most post-doctoral, most physics trained, so not just "opiniated geology undergrad" or "crusading economist" trained, and all are in pretty broad agreement that theres a lot of thermal and kinetic energy coming from anthropological sources and that energy has to go *somewhere*.

      Quite different to a handful of optimistic experimentalists getting their press release misquoted by the worlds press.

      --
      Excuse the Unicode crap in my posts. That's an apostrophe, and slashdot is busted.
    19. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 0

      "So the earth really was flat for awhile?" As far as the scientific consensus of the day, yep. It sure as fuck was. That's how science works.

    20. Re:Space Drive or Global Warming? by ivano · · Score: 1

      Furthermore, we don't even know how the regular, massive swings in global temperature happen.

      And this is what pisses me off with the climate "skeptics". If you don't know how the system will react when you're increasing the concentration of CO2 then why not err on the side of mitigating the CO2 concentrations instead of "business as usual".

    21. Re:Space Drive or Global Warming? by SuricouRaven · · Score: 1

      It's been done. I don't know exactly how the physics works, but light has been halted in the lab. It involves a Bose-Einstein condensate.

    22. Re:Space Drive or Global Warming? by SuricouRaven · · Score: 1

      Economic reasons. The big CO2 emitter is the use of fossil fuels, which are really cheap and really convenient - that's why we use them in such quantity. Cheap energy helps all industry. Restrict CO2 and you raise the cost of energy and the cost of transport, which will have a negative economic impact.

      Millions of displaced people fleeing the rapidly expanding desert that used to be their home is going to have an economic impact too.

    23. Re: Space Drive or Global Warming? by Anonymous Coward · · Score: 0

      The null result is being miss reported.

    24. Re:Space Drive or Global Warming? by fey000 · · Score: 1

      Erring on the side of caution has great financial costs at the business level and great emotional costs at the citizen level.

      Financially, whomever goes first on that carousel is going to lose a lot of money, unless every country on the planet agrees to jump in at the same time. Emotionally, just by looking at the aggression that pops up when someone suggests the very minute lifestyle change of having one vegetarian-food day per week... Well, you get the point.
      Multiply that by three (USA, Russia, and China all have to agree) and it is suddenly more likely that Hillary Clinton will be invited to the Arkansas High School Reunion of 1921 by a Triceratops riding John Wilkes Boothe.

    25. Re:Space Drive or Global Warming? by letherial · · Score: 1

      Science works regardless of what you think, scientist try to figure out how it works by working together and following a very practiced method that, underneath it all, is developed to bypass human mistakes and its own ego. Therefore, when you get 90% of them to agree, there is a very good probability that it is in fact happening. What do you want 100%? you mean like the bible and god.

      You know what, fuck it, i don't care...in the future, years from now, when everyone is dying off, at least your the one that looks like the idiot.

    26. Re:Space Drive or Global Warming? by Sobrique · · Score: 1
    27. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 1

      One of Isaac Asimov's short stories told how a guy made a photon pause. It ended the universe as we know it.

      Every change we do ends they universe as we know it. Luckily the new universe isn't all that different from the old one.

    28. Re:Space Drive or Global Warming? by TapeCutter · · Score: 2

      Millions of displaced people fleeing the rapidly expanding desert that used to be their home is going to have an economic impact too.

      Nonsense. The war in Syria is all about the power of social media and the "arab spring", nothing to do with the abandoned farms. Nothing to do with mass internal migration away from the rural areas (10% of the population in Syria), nothing to do with skyrocketing food prices, nothing to do with food riots in cities such as Cairo. It's just coincidence these events immediately preceded the uprising(s).

      Surely the worst drought ever recorded in the "fertile crescent" (AKA - the birthplace of agriculture) could not cause that much social unrest, a grumbling tummy and dusty throat maybe, but riots, revolts, and a civil war? Surely it's more plausible that millions of ordinary arabs were "awakened" to the fact they were being oppressed by ruthless dictators because they signed up for facebook and discovered our idyllic democratic world. The fact that none of the factions in Syria are even pretending to be fighting for democracy is irrelevant, that they have seen the "light on the hill" is all that matters.

      And let's not forget the reason that lone protester set himself on fire "triggering" the first uprising - he was driven to do it because they had cut his internet access. The rest of the nation saw the injustice on facebook and took to the streets.

      --
      And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    29. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 0

      And this is what pisses me off with the climate "skeptics". If you don't know how the system will react when you're increasing the concentration of CO2 then why not err on the side of mitigating the CO2 concentrations instead of "business as usual".

      You have to realize that the argument comes from someone who doesn't agree with all the things you take for granted.
      If you don't know how the system will react when you're increasing the concentration of CO2 then you can't possible know how it will react when you decrease it either. In that case you have a lose lose scenario where whatever you do you end up in a bad situation. On top of that decreasing CO2 emissions comes with a cost. That means that you can spend all those resources and the result can be the same or even worse.

    30. Re:Space Drive or Global Warming? by serviscope_minor · · Score: 1

      But... that's even smaller than the ratio versus the threshold of measurement the fellow in this article claims implied experimenter bias and bad science.

      No one claims global warming exists based on measurements from a single weather station. Averages are wonderful things.

      --
      SJW n. One who posts facts.
    31. Re:Space Drive or Global Warming? by cellocgw · · Score: 3, Funny

      a Triceratops riding John Wilkes Boothe.

      I can't decide whether this is funnier with or without a hyphen between "Triceratops" and "riding."

      --
      https://app.box.com/WitthoftResume Code: https://github.com/cellocgw
    32. Re:Space Drive or Global Warming? by HJED · · Score: 1
      No the control experiment did not get the same results. An alternate version of the "drive" that did no comply with the theory it was supposed to work by did. they also tested a control:

      "Finally, a 50 ohm RF resistive load was used in place of the test article to verify no significant systemic effects that would cause apparent or real torsion pendulum displacements. The RF load was energised twice at an amplifier output power of approximately 28 watts and no significant pendulum arm displacements were observed."

      --
      null
    33. Re:Space Drive or Global Warming? by I'm+New+Around+Here · · Score: 1

      I forget the story's title, but it was in one of his anthologies I read long ago.

      In the story, it was done in a vacuum. The buildup was about ancient societies that used 3 to represent pi, when obviously pi is more than 3. But what if pi was 3 when that value was being used, and only became its current value when some smart mathematician decided it had to be something else? Basically following up on the topic of reality changing based on scientific understanding mention in the posts before mine. The story took that concept as a fact.

      So, the speed of a photon in a vacuum is constant. Our modern world is based on the physics that supports that. So, if you manage to make a single photon pause, its speed is not constant, and it means our world is not correct and must change to conform to the new reality.

      --
      If you think I voted for Trump because of this post, you're wrong. I voted for Dr. Jill Stein of the Green Party. Again.
    34. Re:Space Drive or Global Warming? by hypergreatthing · · Score: 1

      Yes. Then inflation theory happened.

      Seriously, there's almost nothing in science that is steadfast and "settled". Science is all about trying to find new ways to explain the universe. Every 15-25 years you basically have to throw away your old science books and understand how older models have been modified and updated.

    35. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 0

      the control experiment got the same results.

      No, it didn't. This is clearly stated in the report, and it has been pointed out here several times. Why do you insist on lying about this?

    36. Re:Space Drive or Global Warming? by ceoyoyo · · Score: 1

      The NASA experiment demonstrated that one man's idea of what was required for thrust generation was wrong. The null device differed from the real device only in not having some ridges machined into the case.

      That doesn't mean the device really is producing thrust useful as a space drive, but it also doesn't mean it isn't. The experimenters reported "anomalous thrust," which is exactly what they saw. More experiments, in a vacuum to start, are required.

    37. Re:Space Drive or Global Warming? by Immerman · · Score: 1

      What contrary observations? Some guy creates a device he claims harnesses an effect that would not be expected normally be visible in nature, and would be far too energy-inefficient to expect any planet-bound organism to have evolved a use for. Aside from the lack of repeatable evidence the situation is not unlike the discovery of semiconductors - a new and unexpected phenomena that is nonetheless not in violation of observations to date.

      As the saying goes - absence of evidence is not evidence of absence. You kind of have to sneak new physics in through the chinks in the armor of the old physics, but that happens all the time, occasionally in earth-shattering ways that offend the sensibilities of the vast majority of the scientific establishment, such as with the discovery of quantum mechanics.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    38. Re:Space Drive or Global Warming? by Immerman · · Score: 1

      Just so we're clear - the well-understood increase in solar energy trapped by human CO2 emissions completely dwarfs all other human energy sources combined, by a factor of ~1,000,000 if I recall correctly. As in the CO2 produced by burning one watt-hour worth of oil is going to capture an average of one *Megawatt*-hour worth of additional solar energy during its stay in the atmosphere. Hence the reason nobody knowledgeable is complaining about anything other than fossil fuels with respect to global warming. If we eliminated CO2 emissions from our energy sources we could increase our energy consumption a thousandfold and still not have to worry about global warming.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    39. Re:Space Drive or Global Warming? by Zero__Kelvin · · Score: 1

      "One of Isaac Asimov's short stories told how a guy made a photon pause. It ended the universe as we know it."

      One of Isaac Asimov's stories ended the world as we know it? I thought the credit for that went to Bono.

      --
      Guns don't kill people; Physics kills people! - John Lithgow as Dick Solomon on Third Rock From The Sun
    40. Re:Space Drive or Global Warming? by blue9steel · · Score: 1

      Personally I've looked at the data and it seems pretty obvious that things are getting warmer but that doesn't mean fixing it is free. Significant restriction of CO2 emissions will have a large economic cost. As a Libertarian I think we should be forcing the re-internalization of all externalized costs anyways just from principle so something along the lines of a carbon tax should be a no brainer but there are plenty of others who don't agree. (Including the corporate shill faction of my own party)

    41. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 0

      Please. I guess we are making progress that you didn't use "97%", you only used 90%. You do know that the 97% figure came from a totally bogus so called study by John Cook, right?
      Very, very, few CAGW skeptics claim that their is absolutely NO warming. What they say if you ever care to listen is the there is no proof of catastrophic consequences (YET) as all the temperature variations can be included inside natural processes. Here is some perspective:
      http://wattsupwiththat.files.wordpress.com/2009/12/noaa_gisp2_icecore_anim_hi-def3.gif and yes, that is NOAA data.
      Additionally, who defined what the perfect global temp should be? Perfect CO2 concentration in the atmosphere in Hawaii? Perfect amount of ice in the arctic and antartic (we all know it should be constant, right?) Alarmists or Climate Molesters continue to attribute everything to warming and CO2 the control knob. The data does not support that assumption. If you can tell us all just what caused all the temperature excursions across the Holocene and why ALL of those conditions are not present now, we are all listening. Hint: When the EPA lists CO2 as a dangerous substance, you know something is f'ed up.

    42. Re:Space Drive or Global Warming? by blue9steel · · Score: 1

      Emotionally, just by looking at the aggression that pops up when someone suggests the very minute lifestyle change of having one vegetarian-food day per week... Well, you get the point.

      How about we just let the market set the price of meat and people can make their own decisions on whether it's worth it or not? The important part is to ensure that externalized costs are re-internalized so that prices reflect the true cost of production.

    43. Re:Space Drive or Global Warming? by Electricity+Likes+Me · · Score: 1

      Did the resistor have a reaction chamber around it? Maybe a conical structure which would only leak hot air through certain outlets, looking suspiciously like a rocket reaction chamber?

    44. Re:Space Drive or Global Warming? by Anonymous Coward · · Score: 0

      Science may not, but Scientists do. Scientists are human and make mistakes, they also get jealous, are blinded by belief and so forth.

    45. Re:Space Drive or Global Warming? by david_thornley · · Score: 1

      Semiconductors followed known physical laws. This thing would violate the Law of Conservation of Momentum, and hence require that physical laws changed from place to place.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
    46. Re:Space Drive or Global Warming? by Immerman · · Score: 1

      Not 100 years ago they didn't - we first had to create new laws of physics to explain how electrons could do the impossible and pass through impassable obstructions.

      All I'm saying is that just because something looks impossible according to current understanding of theory, doesn't mean you can't augment the theories in ways that make the impossible possible without breaking anything. Contrary evidence breeds new insights, and new perspective can sometimes reveal an insurmountable obstacle to be naught but an inconvenience.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    47. Re:Space Drive or Global Warming? by david_thornley · · Score: 1

      Yup, and we'd have to create lots of new laws of physics if this thing does violate the Law of Conservation of Momentum. It would probably be more of a rework than quantum mechanics and relativity (and it would screw up relativity something fierce).

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
    48. Re: Space Drive or Global Warming? by Anonymous Coward · · Score: 0

      No, but political correctness does...

    49. Re:Space Drive or Global Warming? by Namarrgon · · Score: 1

      It's worth noting that Roger Shawyer (the original inventor) maintains that this effect does not violate Conservation of Momentum.

      --
      Why would anyone engrave "Elbereth"?
    50. Re:Space Drive or Global Warming? by Immerman · · Score: 1

      It's also worth noting that his claim reeks to high heaven - if the momentum is somehow extracted from the microwave photons then it should be balanced by the momentum imparted to those photons when first generated. The drive+power source is operating as a closed system, and thus according to classical physics the net momentum cannot change, and the microwave photons remain completely contained until they are eventually absorbed by the resonance chamber.

      It's possible that this thing actually works, but if it does it will almost certainly prove not to be governed by his theory of extracting net momentum from bouncing photons. Maybe it's pushing against the quantum vacuum, maybe it's pushing against the fabric of space-time itself, but if it does in fact accelerate it's almost certainly pushing against *something* that is not confined within the resonance chamber. But hey, that's fine. Science is full of people who have discovered fascinating new phenomena only to have their theories about the cause smashed when others in the community offer a better explanation.

      I'll admit I'm not well-versed in relativistic effects, but a quick skim of his principle of operation page appears to throw up a huge red flag at the beginning of the third paragraph:

      If the same EM wave is travelling at a fraction of the speed of light...

      Which sounds like nonsense to me - EM waves (aka photons) travel at the speed of light in vacuum - no more, no less. Ever. You can alter their energy and thus momentum by choosing a different frame of reference, but their velocity is constant from any frame - that's the crazy impossibility that Einstein uncovered.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
  5. BullShit by kiphat · · Score: 1

    Jeez, 100 years later, and you don't think that current day scientists account for, and try to eliminate voodoo science these days? This is just plain FUD. Get over yourselves!

    1. Re:BullShit by s.petry · · Score: 2

      Read TFA and this one. If you believe that "science" has become altruistic and above corruption, you simply have not been paying attention to science. Sure, there is some good science, but there are always crap programs as well. Many of which are performed at the direction of our Government. You know, the same people that won't fund NASA but can waste money trying to figure out if you are a sociopath by your tweets (and that's not the worst waste of science funding, just an easy target).

      --

      -The wise argue that there are few absolutes, the fool argues that there are no probabilities.

    2. Re:BullShit by mbone · · Score: 1

      Sturgeon's law : 90% of everything is crap.

    3. Re:BullShit by Delirium+Tremens · · Score: 3, Funny

      You sound like a potential sociopath. Just as a precaution, can you share with us your Twitter information?

    4. Re:BullShit by fahrbot-bot · · Score: 1

      Sturgeon's law : 90% of everything is crap.

      Does that apply to Sturgeon's Law itself too?

      --
      It must have been something you assimilated. . . .
    5. Re:BullShit by s.petry · · Score: 3, Insightful

      I can't be a sociopath, I don't have a Twitter account.

      --

      -The wise argue that there are few absolutes, the fool argues that there are no probabilities.

    6. Re:BullShit by ultranova · · Score: 1

      You know, the same people that won't fund NASA but can waste money trying to figure out if you are a sociopath by your tweets (and that's not the worst waste of science funding, just an easy target).

      But think of all the untapped political and economic talent this program could find!

      --

      Forget magic. Any technology distinguishable from divine power is insufficiently advanced.

    7. Re:BullShit by kiphat · · Score: 2

      I get your point. But the objective of science is to test a theory. And when your experiments get results, then you test it again to ensure you get the same results. Rinse/Repeat. And then you publish, in a hope that the scientific community accepts your results. This is what happened in this case. NASA saw a hint of credibility in the results of another teams work. They performed the experiment themselves, and got similar , though not as impressive, results. They published. Now it's up to others to either prove or disprove those results. Either deem the experiment valid or invalid by running the experiments yourself, or, with all due respect, shut the fuck up.

    8. Re:BullShit by mbone · · Score: 1

      90% of the time

    9. Re:BullShit by Immerman · · Score: 1

      Roughly - the remaining 10% of the law is "crap"

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    10. Re:BullShit by Immerman · · Score: 1

      I think you're confusing sociopath with narcissist. Granted there's some substantial overlap, but strictly speaking narcissism isn't a prerequisite.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    11. Re:BullShit by Rockoon · · Score: 1

      "Today, the solitary inventor, tinkering in his shop, has been overshadowed by task forces of scientists in laboratories and testing fields. In the same fashion, the free university, historically the fountainhead of free ideas and scientific discovery, has experienced a revolution in the conduct of research. Partly because of the huge costs involved, a government contract becomes virtually a substitute for intellectual curiosity. For every old blackboard there are now hundreds of new electronic computers. The prospect of domination of the nation's scholars by Federal employment, project allocations, and the power of money is ever present – and is gravely to be regarded. Yet, in holding scientific research and discovery in respect, as we should, we must also be alert to the equal and opposite danger that public policy could itself become the captive of a scientific-technological elite. The prospect of domination of the nation's scholars by Federal employment, project allocations, and the power of money is ever present – and is gravely to be regarded. It is the task of statesmanship to mold, to balance, and to integrate these and other forces, new and old, within the principles of our democratic system – ever aiming toward the supreme goals of our free society." - President Dwight D Eisenhower, Jan 17, 1961

      --
      "His name was James Damore."
  6. Shit! Shit! Shit! Shit! Shit! .... by Anonymous Coward · · Score: 0

    I was SO hoping that this was true!

    One step closer to sci-fi type of space propulsion - maybe relativistic speeds!

    I feel so crushed!

    1. Re:Shit! Shit! Shit! Shit! Shit! .... by Anonymous Coward · · Score: 0

      Yes, the reported MILLINEWTON thrust was surely the missing link to warp drive.

      We *know* space is mostly empty with nothing but hostile dead rocks here and there. What's the appeal?

    2. Re:Shit! Shit! Shit! Shit! Shit! .... by theshowmecanuck · · Score: 2

      If they would have used an Oscillation Overthruster they would have got better results.

      --
      -- I ignore anonymous replies to my comments and postings.
    3. Re:Shit! Shit! Shit! Shit! Shit! .... by Brett+Buck · · Score: 2

      What's that watermelon doing there?

    4. Re:Shit! Shit! Shit! Shit! Shit! .... by theshowmecanuck · · Score: 2

      Well played. Laugh while you can, Monkey Boy!

      --
      -- I ignore anonymous replies to my comments and postings.
    5. Re:Shit! Shit! Shit! Shit! Shit! .... by Anonymous+CowWord · · Score: 1

      Yes, the reported MILLINEWTON thrust was surely the missing link to warp drive.

      The discovery, if real, would have not gotten us warp speed. The parent posted said "relativistic" speed, which means close to c, but not higher than c. If this discovery were true, then that implication absolutely holds as we would then have a mechanism where we could gain speed without need for a propellant.

      --


      Disclaimer: My opinions are my own and do not, in any way, reflect the opinions of my employer or university.
    6. Re:Shit! Shit! Shit! Shit! Shit! .... by Anonymous Coward · · Score: 0

      Yeah, just the need for a magical electricity source. No space for you, Nutter!

    7. Re:Shit! Shit! Shit! Shit! Shit! .... by Anonymous+CowWord · · Score: 1

      Empty space contains a very low concentration of hydrogen which could be used via fusion, not to mention there are solar panels that can, you know, generate electricity.

      --


      Disclaimer: My opinions are my own and do not, in any way, reflect the opinions of my employer or university.
    8. Re:Shit! Shit! Shit! Shit! Shit! .... by david_thornley · · Score: 1

      We have a way of producing thrust without propellant: fire off photons in one direction. A flashlight gives off a teeny bit of thrust when turned on. It's not particularly efficient, since the momentum of a photon is its energy divided by the speed of light, so you need a whole lot of energy to get measurably momentum, but it has the notable virtue of not contradicting a pretty fundamental law of physics.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
  7. Usually when an article is plugged on many major.. by Anonymous Coward · · Score: 0

    News outlets like this is because it is being obfuscated. There probably really is something to this. But I doubt it will be implemented by anyone outside of the elite.

  8. The NASA experiment is nothing like N-rays by Anonymous Coward · · Score: 5, Informative

    The NASA science is just fine: http://www.wired.co.uk/news/archive/2014-08/07/10-qs-about-nasa-impossible-drive

    1. Re:The NASA experiment is nothing like N-rays by cbhacking · · Score: 5, Insightful

      Thank you. The Fucking "Article" in the summary gets it so wrong I want to find the moron who wrote it and force him to actually read the paper that he gets almost completely wrong.

      Error 1) The Cannae Drive and the EmDrive are not the same thing, at least according to the inventor of the Cannae Drive. Every result that the article talks about for the EmDrive was actually from NASA testing the Cannae Drive.

      Error 2) The difference between the test and "null" devices was that one of them had slots on it (believed to be required for the Cannae Drive) and the other did not. According to Fetta (the inventor of the Cannae Drive, not just another person who built an EmDrive to test out), these slots are required. According to Shawyer (the guy who actually invented the EmDrive), they are not required. Looks like the EmDrive guy was right: they weren't required. This is addressed in Q2 of your fine link.

      Error 3) TFA never mentions this, but NASA Eagleworks *ALSO* tested Shawyer's version of the drive. It was over 3 times as efficient, producing about 91 microNewtons of thrust from 17 Watts of power (the Cannae Drive got 40uN from 27W). They didn't have a "null" device for that one, aside from a resistive dummy load... which produced no thrust when energized. Also, the tested drives produced no thrust when *not* energized.

      I really wish people would stop parroting the false claims in TFA.

      --
      There's no place I could be, since I've found Serenity...
    2. Re:The NASA experiment is nothing like N-rays by Anonymous Coward · · Score: 0

      Perfect rebuttal to the "clever" skeptics who haven't actually bothered to read the article correctly and are busy writing their link-bait rebuttals in the hope of getting their 5 minutes in the sun and some clicks through to their website.

      Bottom line, *if* what they are saying is true, it's absolutely awesome. Not warp drive but definitely a step up from the solutions we have now for space propulsion. I so hope it's real... Humanity needs this.

    3. Re:The NASA experiment is nothing like N-rays by Immerman · · Score: 1

      > definitely a step up from the solutions we have now for long term space propulsion

      Fixed that for you. Assuming it works as claimed, it basically replaces the need for reaction mass with the need for a much larger power source. I believe a good ion drive will give you *far* more thrust per watt, so unless you're planning to operate the thrusters long enough that your reaction mass would outweigh the larger power supply, an EmDrive would be a losing proposition. Some satellites might benefit from the change, but a conventional geo-magnetic drive would perhaps be an even better solution in near orbit.

      With interplanetary travel it might be a toss-up, especially for, say, a Mars colonization mission where you might want to carry along a nuclear reactor anyway. Even there though an ion drive probably doesn't require enough reaction mass to be significant. If you wanted to launch a multi-year exploration the asteroid belts though, there you're probably getting to the point where an inefficient but propellantless drive would start to pay off. And for timely interstellar travel there's no question, reaction mass is the limiting factor.

      Of course there's also the possibility that the current EmDrives are a very inefficient first attempt at harnessing a new phenomena and would, once they gained acceptance, be improved dramatically. In which case their mass, thrust, and/or maintenance requirements might begin to compare favorably to ion drives.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    4. Re:The NASA experiment is nothing like N-rays by Anonymous Coward · · Score: 0

      None of which really matters compared to the incoming prior for this experiment. It will take significantly more than the above experiments to proof the drive.

      Frankly, the prior probability of these 'drives' working, based on what we know so far about electromagnetic radiation and physics, is easily in the 1e-12 range. Even if these experiments combined make it a thousand times more likely to be legitimate, it's still a billion times more likely to be experimental error than a real effect.

  9. Stupid errors in "refutation" by Anonymous Coward · · Score: 5, Insightful

    The result from NASA may or may not be real. However, this refutation is bad science writing and bad science.

    There are two glaring errors in it:

    • The claim that the "null" experiment should not have a result. The null experiment is badly named; it would create thrust according to one hypothesis as to how this thrust is supposed to be generated, and not create trust according to another hypothesis. There is was a separate reference that should not produce thrust under either hypothesis; and that did not create trust.
    • That it creates thrust without having energy escape. This has not been claimed anywhere else; the emDrive is using energy to create the thrust and the energy is obviously escaping. (It is also, as far as I can read it, using lots more energy than it creates thrust.)

    Apart from these two actual errors in description, the only "evidence" the author has is "This looks sort of similar to cases where science has gone wrong in the past".

    That *is* clearly a warning sign, but it is not actually sufficient to say "This is wrong".

    1. Re:Stupid errors in "refutation" by cbhacking · · Score: 3, Informative

      Bigger stupid one: the "null" device wasn't even supposed to be an EmDrive. It was supposed to be a Cannae Drive, which has a similar design but was invented by a completely different person and (supposedly) operates on different principles. The inventor of the Cannae Drive claimed that the difference between the null and actual test devices would mean there were different results. He was wrong, as shown experimentally.

      The actual inventor of the EmDrive (whose device was also tested by NASA, months ago, and was produced twice the thrust on 60% as much power) says that the Cannae Drive is just an inefficient EmDrive in either null or "real" configuration. http://en.wikipedia.org/wiki/E...

      --
      There's no place I could be, since I've found Serenity...
  10. ridiculous by Anonymous Coward · · Score: 1

    The dogmatic scientists are at it again. Prove that the casimir effect has a relativistic effect in real world application and they spout off saying it's bad science. Next, you're gonna say, "Tesla had no impact on society".

    1. Re:ridiculous by Anonymous Coward · · Score: 0

      The casimir effect goes against their fundamental understanding of physics, so yes, it's most definitely wrong. People that think they're smart don't like to think they're wrong.

    2. Re:ridiculous by Anonymous Coward · · Score: 1

      > The casimir effect goes against their fundamental understanding of physics

      Fitting existing models, is not the bar for correctness. Many observations are unexplained, some paradoxical experiments are repeatable.

    3. Re:ridiculous by david_thornley · · Score: 1

      Last I read about it, the Casimir effect was because of virtual particle production, and therefore based on more or less understood physics.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
  11. Is it really "impossible"? by Anonymous Coward · · Score: 1

    One serious question I have about all this. The device isn't claimed to get energy from nowhere, or to be a perpetual motion machine. The device is claimed to consume electrical power and produce some small amount of thrust.

    Is that theoretically impossible? The only way we know of right now to produce momentum is to push on something, or throw something away (like rocket exhaust).

    When a falling object hits the ground and stops moving, if I am not mistaken the momentum is converted to waste heat. Would it be correct to say that heat is the motion of molecules, and thus the momentum doesn't disappear but is simply randomized? Or is that incorrect and momentum can be converted to a different form of energy?

    P.S. I would like this drive to be a real thing, but I am not very hopeful.

    1. Re:Is it really "impossible"? by Anonymous Coward · · Score: 0

      No, the momentum is transferred to the Earth, which recoils in its orbit very slightly, but coherently. Much of the *energy* is converted to heat, but that's a different issue altogether.

    2. Re:Is it really "impossible"? by penguinoid · · Score: 5, Insightful

      No, it is perfectly possible (and well understood) that you can produce thrust using pure energy with no mass. Just put a lightbulb and a reflector on your ship; as long as you can power the lightbulb you will produce thrust. The problem with this is that it is ridiculously inefficient, and since your power generation is not massless, this is roughly equivalent to using pathetically bad fuel.

      Also, don't confuse energy and momentum. They are separate things, and both are conserved independently of each other.

      The trick to making a good spaceship engine is converting energy efficiently into ship momentum. As far as we know this means creating high-momentum exhaust; conservation of momentum then means your ship gains momentum in the opposite direction. However, the problem is that to create high-momentum exhaust you either need high mass (and this means your ship carries, and has to accelerate, tones of fuel), or you create high-velocity exhaust (which due to the kinetic energy formula means you use a lot more energy).

      If you could find a way to skip the whole exhaust thing and transfer momentum directly into something not on your ship, you would have a space engine far superior to any we know of. The idea with this research was to transfer it into the quantum vacuum something-or-other. This would be analogous to how an airplane transfers momentum to the atmosphere or a boat to the water or a car to the land. In theory this could work and even be more efficient than using light as your exhaust.

      --
      Don't waste your vote! Vote for whoever you want, unless you live in a swing state it won't matter anyways
    3. Re:Is it really "impossible"? by rubycodez · · Score: 1

      nonsense, the ground is too elastic.

    4. Re:Is it really "impossible"? by Anonymous Coward · · Score: 0

      A little reading on Kinetic Energy is in order before you open your pie hole again.

    5. Re:Is it really "impossible"? by ultranova · · Score: 5, Interesting

      When a falling object hits the ground and stops moving, if I am not mistaken the momentum is converted to waste heat.

      You are mistaken. Energy is converted to waste heat (which is a form of energy, so total energy is unchanged). Momentum is unchanged - some of it is simply transferred to Earth.

      Conservation of momentum is just as fundamental a principle as conservation of energy. That doesn't mean that a drive that requires no fuel is impossible - because you can convert energy to matter - it just means that it has to dump the counterforce somewhere to keep momentum accounts balanced.

      --

      Forget magic. Any technology distinguishable from divine power is insufficiently advanced.

    6. Re:Is it really "impossible"? by Anonymous Coward · · Score: 0

      That has nothing to do with anything. The combined momentum of Earth + falling object is wholly unchanged by the collision, no matter what the elasticity of the ground is. All the elasticity changes is whether the ball bounces back up or goes splat -- i.e. the efficiency of the conversion of kinetic energy to heat.

    7. Re:Is it really "impossible"? by Anonymous Coward · · Score: 1

      A little reading on Kinetic Energy is in order before you open your pie hole again.

      Shouldn't it be tau hole since it goes all the way around?

    8. Re:Is it really "impossible"? by TapeCutter · · Score: 1

      The momentum is conserved as inertia. A force of some kind is required to change the inertia into momentum or vica-versa, the kinetic energy is (mainly) conserved as heat and sound, as you implied, heat and sound can be thought of as the kinetic energy of moving atoms. However the momentum/inertia is a property of matter, so it remains with the original object, regardless of whether the atoms are solid and falling or colliding and vapourising. And yes, no matter what happens the system as a whole will gain entropy (become more randomised).

      The odd bit about all this is that nobody has a clue what "causes" momentum or gravity, they are amongst a handful of "fundamental properties" of the universe that we are forced to accept at face value, in our efforts to understand the universe these "fundamental properties" serve a similar utilitarian purpose as the fundamental axioms of mathematics.

      --
      And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    9. Re:Is it really "impossible"? by Anonymous Coward · · Score: 0

      Furthermore, only some of the energy is converted to waste heat on short timescales. Some energy is converted into pressure waves (sound), other into deformation or fracture of the falling object or ground, etc. You could argue that all of these are intermediary forms and eventually all the energy is re-released (as heat), but those are completely different timescales.

    10. Re:Is it really "impossible"? by rubycodez · · Score: 1

      I was addressing what happens to center of earth in orbit: nothing. the elasticity will cause the *part* of the earth to deform to, and earth+ ball momentum will be conserved. But modeling the situation like a high school freshman as if they were rigid bodies is ludicrous

    11. Re:Is it really "impossible"? by wierd_w · · Score: 1

      This is probably very wrong. (yes. declarative.)

      The way I understood the quantum vacuum, was that it spontaneously produces particle and antiparticle pairs, that exist for a very tiny amount of time, recombine, and then disappear. The energy needed to create these particle pairs from "nothing" is not elaborated on well; it is a matter of some controversy as I understand. However, the existence of these particles has been experimentally verified, as they produce real, measurable effects.

      Likewise, a high energy photon has a certain probability of degrading into a pair of antiparticles with low mass, (electron positron pair), which then also recombines back into a high energy photon. This happens in the presence of matter, according to wikipedia. http://en.wikipedia.org/wiki/P... Even the very best made EMDrive is going to have SOME gas inside the chamber, so "Check".

      Since the virtual particles have charge, and the electron-positron pair have charge, a charge interaction is possible. Since the quantum vacuum is random, this means that light will suffer some small dispersion from the interaction even in deep space (which also has diffuse hydrogen atoms). The question that makes many scientists so angry, is that when this "real particle pair interacting with a not-real particle pair" happens, the vector of motion of the real particle pair can be altered slightly, as will the not-real pair. That seems to be the explanation for EMDrive. However, the not-real pair will vanish from existence, and the real particles will turn back into a photon.

      Energy is exchanged via the interaction, but the energy vanishes on one side of the interaction as the non-particles vanish into the quantum soup again.

      A device like the EMDrive tries to manipulate the probabilities of these interactions so that light, and electromagnetic fields in the device create additional interactions.

      When both the light and the virtual particle pairs emerge into "Being", they exhibit some electrical charge characteristics. This means that an ambient magnetic field (which will be induced by the cavity resonating with high energy microwaves) will also interact with this exchange. Some of the "momentum" will be conferred to the field, which will then push on the field's source-- the cavity walls.

      This means that the interactions going on inside the chamber, if you can cause a statistically relevant change in how the interactions proceed, can produce a net push against the cavity wall which will cause pushing against "light" trapped inside the cavity (the microwaves, as expressed as an antiparticle pair), and the virtual particle plasma that exists only for small moments of time before vanishing.

      This appears to violate conservation of momentum, because the other half of the equation literally disappears with the disappearing virtual particles.

      it is possible that the kinetic energy imparted to the vacuum particles does not actually vanish, but instead may manifest as a local increase in virtual particle density at the aft end of the device. This could be measured as an increase in the casimir force, if you wanted to check. That's a wildly unfounded idea mind, but I would be curious enough to look if I had the nanotech casimir force detection equipment to do it, and an EMdrive to test against.

    12. Re:Is it really "impossible"? by david_thornley · · Score: 1

      Momentum is not energy. If an object falls, it gains momentum in one direction, but its attraction on Earth means that the Earth gains the momentum in the reverse direction. When it hits, the kinetic energy is turned into heat (among other things), but the momentum remains constant.

      Violating the Law of Conservation of Momentum would be a really big deal, and would require a very large amount of physics to be revamped.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
    13. Re:Is it really "impossible"? by nusuth · · Score: 1

      Conservation of momentum is just as fundamental a principle as conservation of energy. That doesn't mean that a drive that requires no fuel is impossible - because you can convert energy to matter - it just means that it has to dump the counterforce somewhere to keep momentum accounts balanced.

      This device cannot work by ejecting mass it produces. The (lowest) quoted performance is 5.3 uN per W. If input energy is completely converted to ejection mass, the mass must be ejected at ~1500c to achieve the quoted force.

      --

      Gentlemen, you can't fight in here, this is the War Room!

  12. Oh come on!!! by Anonymous Coward · · Score: 0

    After growing up dreaming about space, only to be depressed by reality as I studied physics, grant me one or two days to be excited about renewed dreams of flying to the stars in my lifetime....

    1. Re:Oh come on!!! by JWSmythe · · Score: 2

      Unfortunately, it could only get you to one star in your lifetime, and we have a pretty decent view of it from here.

      --
      Serious? Seriousness is well above my pay grade.
    2. Re:Oh come on!!! by Anonymous Coward · · Score: 0

      no worries, this debunker didn't make a good case. More bullshit to feed the Fox News croud

  13. Obligatory XKCD reference by Anonymous Coward · · Score: 1

    http://xkcd.com/1404/

    1. Re:Obligatory XKCD reference by Anonymous Coward · · Score: 0

      is there an xkcd on obligatory references to xkcd?

  14. Don't have to go back 100 years by fermion · · Score: 5, Insightful

    25 years ago there was desktop cold fusion. A lot of people wanted it, there were conferences on it, probably at least a hundred million was invested in it over a year or two. but it was bogus. The hypothesis was sound, it was no completely unreasonable, but the experiments showing a positive results on the hypothesis were flawed. It is not that cold fusion does not exist as something that might happen, it is that we have not shown it happens. I don't want to muddle the situation, but there is a clear line between what can happen and does happen in the lab. Theoretical people have told me that their models are necessarily not connected with reality. They are math, and the math sometimes tells us what is going on, sometimes fools us, and sometimes is just bonkers. What differentiates all this is good experimental science, which is really hard to do. I mean really hard, and for the most part does not lead to a theory, but only data that can be collected by math. This is why even though Galileo did a lot of good research, it was 100 years before the math caught up and we were able to do what we now classify as as science.It is why electromagnetic, the speed of light, quantum mechanics, and what is to follow is going to drop out the math. Which is to say we have a very complex interactions. Virtual particles drop out the math. The math says that they must exist, but inherently can't do anything useful. This is in the same way that photons can be coupled so they may seem to act faster than the speed of light(maybe, until we get distances longer than the earth-moon system we cannot really know) but no one expects information to be communicated faster than the speed of light. The end result is that if you have an experiment that violates the math, you have to be very sure it is a good experiment, and the consensus is quickly building that this is not. There is a certain responsibility to being an experimentalist. One can't just willy nilly say there are 40 dimensions of energy is created from the aether. On can be sloppy with conclusions, as Einstein was with the photoelectric effect, or Milikin in his oil drop experiment, but one does have a responsibility to do ones best to control systematic errors, and not jump to conclusions when one does not fully understand those errors. Unless, of course, like the two cited authors you are lucky enough to be accidentally correct.

    --
    "She's a scientist and a lesbian. She's not going to let it slide." Orphan Black
    1. Re:Don't have to go back 100 years by 93+Escort+Wagon · · Score: 4, Funny

      Not to mention that ColdFusion tended to exhibit a lot of remotely exploitable bugs.

      --
      #DeleteChrome
    2. Re:Don't have to go back 100 years by gl4ss · · Score: 1

      I dunno about this.

      the article makes claims different to the news reports I read about the subject, like about the test environments and that they did use a dummy version which did not show thrust but this tfa claims the dummy version produced thrust, which of course would be a red flag, but as far as I can tell according to nasa from the news the dummy version did not produce thrust and this was brought up as a point about how precarious the experiment had to be... in those news articles most of the article was devoted to how they tried to minimize the error and false readings especially for the reasons highlighted in the TFA.

      so I still would like to see someone else do this experiment again.. or heck, just put a satellite up and see if it stays up with it.

      --
      world was created 5 seconds before this post as it is.
    3. Re: Don't have to go back 100 years by Anonymous Coward · · Score: 0

      [quote]Theoretical people have told me...[/quote]
      I have imaginary friends too, but I try to tell them to stay at home while I go to work.

  15. A little behind the times by mbone · · Score: 5, Interesting

    I thought that this take was pretty appropriate when all we had to go on was the conference abstract. Now, however, the full paper (still not peer reviewed) is out, and it is much better. I still think it is wrong, but I do not think it is bad science, and it will have to be refuted experimentally.

    Comments

    * the "null thruster" is something of a red herring from the abstract. Reading the paper, they have a true "null load," which shows no thrust, while the "null thruster" was a mod of a Cannae drive, and so more of a test of drive theory than the experimental setup, and, in any event, they tested several types of drives.

    * they did pretty much all of the things you would like to see (such as reversing the direction and making sure the thrust reverses).

    * they seem to have done a thoughtful and careful job, including testing in vacuum.

    So, I still think they are likely wrong, but this ups the ante. In my opinion, you can't just say "this is obviously wrong." I bet there will be a bunch of attempts to replicate it in labs all over the place.

    I find the theories here (and I have now read several in some depth) to be bad, either wrong, or handwavy, or both*. I would discount them entirely. In the unlikely event that this effect is real (and I mean, some non-standard physics effect), then the theory is likely to be something different than any of the proposals, The experiment's the thing, and the game now has to be disproving the Eagleworks results. Only once a bunch of people have failed to do that (or one person has done it) is there much else to say.

    * On pushing on virtual particles or quantum spacetime or whatever. These are 1 GHz photons, more or less. Such pushing would cause a _vacuum_ dispersion. Vacuum dispersion limits are set by timing of high energy photons from Gamma ray bursts across cosmic distances. These tests use ~ 100 MeV photons over ~10^10 light years, and so are many orders of magnitude tighter than the NASA Eagleworks results. This in my opinion rules out any photon - vacuum interaction as the cause of these anomalous thrusts.

    1. Re: A little behind the times by Anonymous Coward · · Score: 0

      New discoveries are cool. Then they go through the science wringer. If it works it will be explained why. If it doesn't we will learn something valuable about why the effect appears despite attempts to exclude externalities.

      This is exciting, especially if you are a nerd that loves science. Plain and simple.

    2. Re:A little behind the times by PvtVoid · · Score: 1

      In my opinion, you can't just say "this is obviously wrong."

      Yes you can: it's obviously wrong. Read the paper from the inventors on how the engine is supposed to work. It's a series of novice-level mistakes about physical principles and mechanisms. The entire idea is completely fucking batshit from the very beginning. The very fact that somebody actually got funding to build one of these absurd snake-oil devices indicates very little except that something is very, very wrong with the funding process. NASA is infamous for this kind of loony bullshit, and they really need to stop. It makes them look like morons.

    3. Re:A little behind the times by RightwingNutjob · · Score: 5, Informative

      * they did pretty much all of the things you would like to see (such as reversing the direction and making sure the thrust reverses).

      * they seem to have done a thoughtful and careful job, including testing in vacuum.

      So, I still think they are likely wrong, but this ups the ante. In my opinion, you can't just say "this is obviously wrong."

      Sure I can. Was the apparatus temperature controlled during the vacuum test? Was it tested in all orientations (not just backwards) to remove any gyroscopic weirdness from the rotation of the earth (think Michelson-Morley experiment). Was there EM coupling between the cavity, the torsion balance, and the chamber that could manifest as an anomalous torque, not thrust (that is, did they just make a big brushless motor)? Does the instrument register a thrust when the cavity is radiating but is bolted to the chamber floor and not the balance? Is there no thrust when it's oriented orthogonally? Does it still work if the power supply is electrically isolated from the vacuum chamber without a common return (ie did they build an electron gun)?

    4. Re:A little behind the times by mbone · · Score: 5, Interesting

      In my opinion, you can't just say "this is obviously wrong."

      Yes you can: it's obviously wrong. Read the paper from the inventors on how the engine is supposed to work. It's a series of novice-level mistakes about physical principles and mechanisms. The entire idea is completely fucking batshit from the very beginning. The very fact that somebody actually got funding to build one of these absurd snake-oil devices indicates very little except that something is very, very wrong with the funding process. NASA is infamous for this kind of loony bullshit, and they really need to stop. It makes them look like morons.

      I agree that the theory (or, at least, that theory) is obviously wrong. Cool, but from experimentalist standpoint, irrelevant. This paper, and the chinese paper, do not appear to the written by charlatans, they claim positive results, and so this will have to confirmed or denied by experiment. I have seen some very bad experimental NASA studies of new physics (*cough*warp drive*cough*), but this one doesn't appear to be so. If you see an obvious flaw in the full paper, please post it and I will publicize it.

      I would advise in general that you don't hyperventilate so much. This process will work out just as it should; I have no doubt that in a year there will be a dozen tests of this and we will likely know for sure one way or the other; in the meantime, I would take a $ 200 bet that the standard model will still prevail when this is over.

    5. Re:A little behind the times by PvtVoid · · Score: 1

      If you see an obvious flaw in the full paper, please post it and I will publicize it.

      I have a better idea: how about I ignore the whole sordid, over-hyped clusterfuck and go do something useful with my time? The Emfdrive company will go under like a submarine in short order, and we won't have to worry about them anyway.

    6. Re:A little behind the times by Anonymous Coward · · Score: 2, Insightful

      they did pretty much all of the things you would like to see (such as reversing the direction and making sure the thrust reverses).

      * they seem to have done a thoughtful and careful job, including testing in vacuum.

      So, I still think they are likely wrong, but this ups the ante. In my opinion, you can't just say "this is obviously wrong."

      Sure I can. Was the... Was it... Does it...

      That your comment got modded 5:informative is hilarious. How about you RTFM and not phrase your comment in the form of questions? This was NASA. If NASA believed any of those alternate explanations you cited, do you think they'd be stupid enough to damage their reputations by presenting this absent those prominent criticisms? I admit, my respect for the U.S. govt is pretty low, like wow, really low. But still, you're theory of NASA incompetence I find more staggeringly unlikely than a device which superficially breaks the 'law' of conservation of momentum. And of course the stated theory suggests that it is not really a violation of that law, but an effect when dealing with subatomic particles that were not part of the cruder models used when originating the verbiage of such old 'laws'. I want to believe... :)

    7. Re: A little behind the times by Anonymous Coward · · Score: 0

      Why so angry? As previously stated, future experiments will either validate or invalidate the results, and a year from now the whole thing will probably be forgotten (or we'll all be walking around on mars!).

      In any case, what's up with all the vitriolic cursing stupidity I see on Slashdot these days? Can't we all be calm and collected, and converse civilly with one another?

    8. Re: A little behind the times by Anonymous Coward · · Score: 0

      Do what? Masturbate? Watch hentai anime? Do a star trek marathon? It's not like you have anything meaningful to do, nerd.

    9. Re:A little behind the times by Michael+Woodhams · · Score: 1

      I agree. The theory can be rubbished in very simple terms: The inventors assume no new physics, and conclude their device will violate conservation of momentum. All the 'input' physics conserves momentum. Therefore their analysis is wrong.

      If I give you a list of numbers which are all even and ask you to add them up, and you give me a sum which is odd, I know you've messed up. I don't need to check the details of your adding and point to exactly where you went wrong. This situation is analogous.

      So if the device *does* work (which I very much doubt) it will be pure wild coincidence, not due to any cleverness on the part of the inventors.

      (Note: these comments are based on the description of the EmDrive in New Scientist some years ago. I am unfamiliar with the Cannae Drive, so I don't know if it has the same theoretical flaw. If it *does* end up working, I will revoke my vow to never again subscribe to New Scientist.)

      --
      Quattuor res in hoc mundo sanctae sunt: libri, liberi, libertas et liberalitas.
    10. Re:A little behind the times by queazocotal · · Score: 2

      "* they did pretty much all of the things you would like to see (such as reversing the direction and making sure the thrust reverses).

      * they seem to have done a thoughtful and careful job, including testing in vacuum."

      Read the article carefully.

      They did not actually test in vaccum. They tested at atmospheric pressure, because they did not have suitable vacuum rated amplifiers.
      Spending half a page explaining how the vacuum system worked, only to have a throwaway line later in the paper (search on electrolytic) that they diddn't
      actually use it is at best shoddy writing.

      To quote from an earlier post I made on this.
      The net torque is zero - yes.
      The problem is that because the 'vacuum' chamber wasn't part of the measured system, you can exert torques against it without issue. Convection can do this and distort the measurement.

      A major reason why this can't be true - or if it is it's bigger than any Nobel Prize-winners discovery in history, and maybe all of them:
      The reported thrust in the NASA paper is 0.4N/kW.
      Power = force * velocity.
      If you put this on a railway car going at 10m/s, then you get 0.4W*10m/s = 4W out for 1000W in.
      If the car is going at 100m/s, it's 40W.
      At 3000m/s, 1200W.
      You take 1000W of this to run the engine, and you now have 200W of free energy.
      This can be arbitrarily scaled up.

      If it works, it is not only a space drive, it's a perpetual motion machine that needs no fuel and emits energy.

    11. Re:A little behind the times by delt0r · · Score: 1

      There is another problem with the emDrive. Given the shape of microwave cavities used in communications and powers involved, we would have seen the effect long before now.

      --
      If information wants to be free, why does my internet connection cost so much?
    12. Re:A little behind the times by delt0r · · Score: 1

      If you want to test every claim by people that don't appear to be charlatans, you will spend entire lifetimes just showing bunk is bunk (try anitgravity, free energy BS on youtube). Extraordinary claims need extraordinary evidence.

      --
      If information wants to be free, why does my internet connection cost so much?
    13. Re:A little behind the times by Anonymous Coward · · Score: 0

      You are describing a thing that needs a name. Let's call that thing "The Scientific Method".

      NASA published because they did enough experimentation to and got sufficient correlated results to produce a thesis. A thesis significant enough to them that they thought it merited publication with the attachment of one of the most respected names in science: NASA.

      Your questions are, in essence, a call for even more testing. If the device works, and based on their evidence, I believe that it does, then as they start to test with all of the experimental variations you suggest, their results should continue to be confirmed. Each time that happens, we should put another quarter in the meter.

      If however, it is an experimental error, then their results will not be confirmed. But at some point the experiments will be run 100s of times by different scientists and we'll have a thumbs up or thumbs down. Just because we're not there yet doesn't mean this is all bullshit. That's just one thesis.

    14. Re:A little behind the times by Anonymous Coward · · Score: 0

      You cant say something is "obviously wrong" and then justify that position with unanswered questions. An unanswered question is simply an unanswered question and not a proof of invalidity.

    15. Re:A little behind the times by Anonymous Coward · · Score: 1

      Actually it was 40 micronewtons which is 0.0004N using 28W not kW which works out to 0.0014236N/kW. Even if you plug that into what you said, you're arbitrarily adding power to the system because your train's initial state is 10m/s. No idea why we're even talking about velocity there though except that it was convenient for your attempt to show "power out of nothing". The debate isn't about that anyway, the debate is about how it generated thrust in a closed system. The thrust isn't greater than the energy being put into it (using your numbers it would be but your numbers are wrong). It is about how the system is generating thrust.

    16. Re:A little behind the times by Geoffrey.landis · · Score: 1

      That your comment got modded 5:informative is hilarious. How about you RTFM and not phrase your comment in the form of questions? This was NASA. If NASA believed any of those alternate explanations you cited, do you think they'd be stupid enough to damage their reputations by presenting this absent those prominent criticisms?

      Just as a minor correction, this was one lab group, at one NASA center. It was not "NASA" collectively.

      NASA is not a monolithic entity. Other scientists at other parts of NASA have expressed some amount of skepticism about the conclusion that the experimental results quoted are best explained as the thruster producing anomalous thrust. We all want to see these results carefully replicated.

      It would be better if these results had been reported as "here's a preliminary anomalous result that needs to be verified," instead of "OMG, a space drive!"... but they weren't.

      --
      http://www.geoffreylandis.com
    17. Re:A little behind the times by ceoyoyo · · Score: 1

      Which NASA is working towards gathering. What's the problem?

      Somebody convinced NASA that it was worth spending some money checking this out, so they build a small scale version and tested it. Results were positive, with some compromises in the experiment. The next step is to do a more rigorous experiment. If that's positive you invest a little more. Eventually, if everything goes well, you launch a test satellite. There's your extraordinary evidence.

      Many crazy ideas are not worth testing. This one isn't nearly as crazy as the media likes to make it sound. The leading theoretical explanations don't involve any violations of conservation of momentum.

    18. Re:A little behind the times by ceoyoyo · · Score: 1

      So you're arguing that NASA shouldn't test a potential new propulsion technique based on some shady logic founded on a description in a pop science magazine? Very rigorous of you.

    19. Re:A little behind the times by ceoyoyo · · Score: 1

      Your "major reason" is BS you made up. Have you heard of relativity?

      If you're going to use P = F*v then the v has to come from the thruster, not from however you got the train up to mach 10 in the first place. Congrats though, you managed to dazzle the mods with some "math."

    20. Re:A little behind the times by green+is+the+enemy · · Score: 1

      Yes, the paper handles the vacuum issue very badly (Sections II and IV contradict each other, and Figure 22 says "(In 750mm Air)"). However, convective air flow is unlikely to be the cause of the anomalous thrust. I would expect convection to have a slow time constant as objects heat up and cool down, but the thrust turns on and off quickly in the paper.

      I would like to see more plausible causes of the anomalous thrust. Any new physics discovery is extremely unlikely here, but so far the proposed explanations have been lacking.

      Ionization of air might be one such possibility. The very high-Q cavity with tens of watts of input power may reach electric fields strong enough to ionize the air inside the cavity. The ions/electrons/air would need to escape the cavity somehow to produce thrust.

    21. Re:A little behind the times by Anonymous Coward · · Score: 0

      Which NASA is working towards gathering. What's the problem? Somebody convinced NASA that it was worth spending some money checking this out, so they build a small scale version and tested it.

      sigh

      Nobody convinced NASA of anything. NASA is not some kind of infallible Borg mind. Some people at NASA did what you said. Some other people at NASA think they are idiots. Some people at NASA are not on fire.

    22. Re:A little behind the times by Electricity+Likes+Me · · Score: 1

      They did not test it in a vacuum.

      Go to the full paper, search for vacuum. See where that word never appears? In the experimental section describing their actual tests. Neither does "pressure". And yes, I've read the whole thing.

      They describe the capabilities of the device, in such a way as to imply they tested in a vacuum. But they never did it - they never explicitly say they did it, and in the conclusions they then say they need to test in a vacuum because they couldn't because they didn't have vacuum rated RF amplifiers.

      So no, no they did not test in a vacuum. They really try to hide it though.

    23. Re:A little behind the times by ceoyoyo · · Score: 1

      You're being pedantic (yes, in your other post too). NASA is a US government agency. Individual researchers in that agency are US government employees. As far as I can tell, this study was funded by internal NASA funds.

      Somebody convinced someone in a responsible position within NASA, with the power to allocate funds and probably assign personnel, that this was something worth looking into. Normal people understand that when you say "NASA did this" or "IBM did this" or "Microsoft did this" that you don't mean that every individual associated with one of those entities was involved, but that someone was, and that there was some kind of institutional involvement. Funding certainly qualifies.

    24. Re:A little behind the times by Immerman · · Score: 1

      Really? When was the last time a large microwave resonance cavity was use in communication installation where micro-Newton scale forces would be noticed? Hell, kilo-Newton scale thrust could potentially be overlooked - how often is a large resonance chamber operated without being firmly bolted down?

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    25. Re:A little behind the times by mbone · · Score: 1

      If you want to test every claim by people that don't appear to be charlatans, you will spend entire lifetimes just showing bunk is bunk (try anitgravity, free energy BS on youtube). Extraordinary claims need extraordinary evidence.

      Extraordinary claims need extraordinary evidence to be accepted, but certainly not to be tested further.

      And, yes, there has to be some judgement involved, and judgements can be wrong. Fortunately, it is a big planet with lots of people on it (and a few off of it), and so interesting ideas tend to get poked and prodded and put through the mill, regardless of the consensus viewpoint.

      (Yes, I know this is likely wrong, and that in 10 years it will likely be forgotten except by a small cohort who claim "coverup!". To those people, I will say, "show me the spacecraft using your drive," just as I say "show me a functioning power plant" to the cold fusion coverup believers today.).

    26. Re:A little behind the times by mbone · · Score: 1

      Ah, I have been thinking about that. The Pioneer 10 and 11 spacecraft had ~ 5 watt radios that were always on, yielding a force of ~ 1.7 x 10^-8 Newtons, directed away from the Sun. With a mass ~ 250 kg, that's an acceleration of 7 x 10^-11 m/sec^2, directed away from the Sun. As it happens, thanks to the so-called "Pioneer anomaly" we can model the acceleration of Pioneer 10 and 11 to order 9 x 10^-10 m/sec^2 (or a little better), so we can say, with great confidence, that the radio system force is or ~ 10^-7 Newtons.

      Now, this radio system does not have a large Q, but this about a factor of 400 smaller than the 40 microNewtons observed in the NAS Eagle Works paper. Note that radio is at prime focus, so photons do travel from there and reflect off the dish, so there is a Q of order 1. I would curious to see the predictions from the various theories for this case.

    27. Re:A little behind the times by mbone · · Score: 1

      If I get to see this in a presentation, I will ask about these. The temperature control is especially relevant. My guess is that the systematic problem is related to leakage of magnetic fields, i.e., basically your big brushless motor idea.

    28. Re:A little behind the times by david_thornley · · Score: 1

      The theory could conceivably be correct, although I'd consider that exceedingly unlikely, considering all the physics that it would invalidate. Math has things that are provable. Physics has things that have always been found to be true up to now, and which mesh intricately with other theories about other observations.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
    29. Re:A little behind the times by Michael+Woodhams · · Score: 1

      No, that is the point. The mathematics is provably wrong.

      --
      Quattuor res in hoc mundo sanctae sunt: libri, liberi, libertas et liberalitas.
    30. Re:A little behind the times by david_thornley · · Score: 1

      Math that is provable is not real. Math applied to physical situations is not provable. You can't prove anything in physics mathematically; the closest you can do is to show that assumptions are wrong.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
    31. Re:A little behind the times by Anonymous Coward · · Score: 0

      If you're an experimental physicist, then debunking bad but reasonable sounding science is your job (that means you get paid to do it!). Several good experiments that agree on the result qualifies as extraordinary evidence.

    32. Re:A little behind the times by delt0r · · Score: 1

      That was with 25 watts. There are cavities with truly massive powers in them. Many orders of magnitude larger than here. For example superconducting cavities used for linear accelerators. The forces they claim would be large enough to be noticed. Also if the force is less than 3.3 nN per watt, its no better than a pure photon drive. Ie just point your microwave transmitter backwards.

      --
      If information wants to be free, why does my internet connection cost so much?
    33. Re:A little behind the times by delt0r · · Score: 1

      Read the results again. They shown no effect outside systematic error. In God we trust, the rest of you show me the data. And the abstract is *not* the data.

      --
      If information wants to be free, why does my internet connection cost so much?
    34. Re:A little behind the times by Immerman · · Score: 1

      > Many orders of magnitude larger than here.

      Many is vague: let's put a real number on it and say 6 orders of magnitude, or 25 MW. Pretty good size I'd venture. Multiply that by ~40uN/25W and you've got all of 40 Newtons of force. How often do you really suppose a 25MW microwave resonator is operated in a situation where 9lbs of force would be noticeable? Unless I'm drastically overestimating the size of such a thing friction alone would likely hold it in place. And if not a single 1/8" bolt certainly would.

      Besides which, you're assuming your average microwave resonator would generate a force - and if there's anything at all to the claims that geometry of the resonator is an essential component then your average symmetrical resonator would not.

      Finally, if we take the NASA measurements as indicative of forces being generated we're talking 1600nN/W, almost 500 times the efficiency of a radio-drive. (Incidentally, where did you find that 3.3uN/W number? I've been looking for a trustworthy value for radio thrust). Besides which if it actually works at all, then we're talking about an entirely new propulsion technology - the efficiency can be expected to improve dramatically as our understanding of the physics behind it improves. You wouldn't expect a Babylonian steam engine to be able to haul a train up a mountain, would you?

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    35. Re:A little behind the times by delt0r · · Score: 1

      Many is vague: let's put a real number on it and say 6 orders of magnitude, or 25 MW. Pretty good size I'd venture. Multiply that by ~40uN/25W and you've got all of 40 Newtons of force. How often do you really suppose a 25MW microwave resonator is operated in a situation where 9lbs of force would be noticeable? Unless I'm drastically overestimating the size of such a thing friction alone would likely hold it in place. And if not a single 1/8" bolt certainly would.

      True, i should have run some numbers. In fact 25MW is not far off what accelerators use.

      Photon momentum is easy to calculate. E=mc^2 so the mass per second per watt is m=P/c^2, and its moving at the speed of light so multiply by c and you get momentum per second, or force F=P/c . That is for 1N of force you need 3x10^8 watts. Or for one watt 1/3e8=3.333x10^(-9).

      Finally, if we take the NASA measurements as indicative of forces being generated...

      Lets be very clear, their data shows no such force. Just systematic error. If you get the same "significant" force from the negative control, then its systematic error and you don't make stupid claims.

      We understand EM forces and fields very very well. Quite frankly the original claims don't even past a basic "hinky meter" test. They certainly don't have any proper math/physics to back anything up.

      --
      If information wants to be free, why does my internet connection cost so much?
    36. Re:A little behind the times by Immerman · · Score: 1

      >Lets be very clear, their data shows no such force.
      Oh? Then why didn't their control load generate a thrust? As I recall they tested three devices this time: a Cannae drive, a null-Cannae drive (still supposedly a "valid" EmDrive design), and a resistive control load. Both drives showed roughly the same thrust, which changed direction along with the drive, while the equivalent resistive load showed nothing. It's possible that both drives were operating as ion drives (since they weren't in hard vacuum) or magnetically interacting with the lab equipment, but until such an error source is identified you cannot simply discard the results

      I agree the theory doesn't pass the hinky-meter test, but the tests to date all seem to suggest that *something* is happening - or do you know of a number of independent, well-run tests that have shown a complete absence of thrust? This would hardly be the first time a working technology was built upon a nonsensical theory. (I give you exhibit A - most of Western medicine until the last couple centuries.)

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    37. Re:A little behind the times by delt0r · · Score: 1

      Really look at the data. No the control that should show no thrust at all did (the cavity that should produce no thrust). The force amounts were hardly above the force meters minimum, so where you do expect fairly inaccurate results. Last but not least, it wasn't even done in a vacuum. Forces that small are just not credible with air. Its a 101 of tiny force measurement.

      Extraordinary evidence demands a better standard than... "you can't dismiss the results, but it may be X Y or Z". The fact that such things (air effects etc) were not taken into account is just plain shoddy experimental work with that level of force. Its up there with youtube videos of free energy machines. Either do your experiment properly or don't make claims that your experiment didn't even test.

      --
      If information wants to be free, why does my internet connection cost so much?
  16. Hmm... by Loopy · · Score: 1

    It is important and necessary to independently verify and reproduce these results, meaning that if you detail the setup and methods, anyone else can achieve these results for themselves with the proper equipment

    Interesting. I wonder what other popular and controversial "science" is missing this particular step.

    1. Re:Hmm... by pla · · Score: 1

      Interesting. I wonder what other popular and controversial "science" is missing this particular step.

      Well, in this case, NASA's version of this experiment lacks exactly that. They deliberately used a different design from that used (with reproduceable results) by both the British and the Chinese.

      Yes, Kudos to NASA for going to the trouble of setting up an actual "null" hypothesis test - Except, how about they try the experiment as documented before they go tweaking the conditions in unknown ways? Yes, they thought they built a zero-thrust version of the setup... Except, that presumes that Shawyer actually has the correct theory behind his understanding of the effect. He can have the underlying physics completely wrong, yet still have discovered one of the most important effects ever.

    2. Re:Hmm... by cbhacking · · Score: 2

      Sadly, you're actually wrong even though you're right. Shawyer never said that the "null" device wouldn't produce thrust. That was the claim of a guy named Guido Fetta, who invented something he calls the Cannae Drive (http://en.wikipedia.org/wiki/EmDrive#Cannae_drive). Shawyer just said that the Cannae Drive is an inefficient EmDrive, with or without the slots which distinguished the "null" device from the "real" one.

      Oh, and when NASA tested the actual EmDrive (which was months ago), it actually produced more than twice the thrust on just over half the power. Every result that TFA "reports" for the EmDrive is actually from the Cannae Drive test, not the EmDrive test at all! The author of that piece of dross needs to be hit with a clue-by-four...

      Note that I'm not saying the EmDrive is "real". I'm definitely not saying Shawyer has a valid explanation for how it works either, even if it does. However, the experiments so far disproved nothing except Fetta's theory of the Cannae Drive; arguably, it actually provided *support* for Shawyer.

      --
      There's no place I could be, since I've found Serenity...
    3. Re:Hmm... by pla · · Score: 1

      Ah, thank you for the correction! I didn't realize NASA's version actually came from someone other than Shawyer, or that they had in fact tested the original design (with more positive results).

  17. Author really knows his "bad science" by Anonymous Coward · · Score: 1, Informative

    He made three key points:
    -The thrust from all 3 experiments varied by 500%. -Duh, the Chinese used kilowatts and Nasa used watts of energy.
    -The thrust measured 30-50n was too close to the min tolerance 10-15n of the instrument. -3x-5x the min is "too close"?
    -OMG the control showed the same thrust as the actual drive! -Not true. But hardly surprising given the wording of the abstract. You would think he would read the paper before tearing holes in it.

    Don't get me wrong. I think the drive probably doesn't work. But this article is written by someone who is gleefully uninformed.

    1. Re:Author really knows his "bad science" by Nethemas+the+Great · · Score: 1

      Regardless of the author's misinformation/FUD campaign, this seems pretty damn easy to test. Throw the suspected best implementation(s) up on some micro-sats and see what they push. The British guy, plus two independently verified alternative implementations all showing something weird going on ought to be enough to merit a proper and definitive experiment or two.

      --
      Two of my imaginary friends reproduced once ... with negative results.
    2. Re:Author really knows his "bad science" by ceoyoyo · · Score: 1

      I imagine they'll get around to that, provided everything goes well, but they'd probably like to do some more ground testing before they invest millions putting up a satellite.

    3. Re:Author really knows his "bad science" by Immerman · · Score: 1

      Putting something in orbit is *expensive*, we're going to need something a lot more compelling than a couple marginal tests to justify doing so.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
  18. Review != accept by pla · · Score: 4, Insightful

    Just over a century ago, N rays were detected by over a hundred researchers and discussed in some three hundred publications

    And just over two hundred years ago, the French Academy of Sciences steadfastly refused to believe that rocks could fall from space, with an abundance of supporting evidence to demonstrate that these "meteorites" had clearly come from weather conditions right here on Earth picking up rocks and flinging them about.

    Funny thing about (good) science - It doesn't simply dismiss new ideas simply because they disagree with existing theories. Oh, but for the first time in human history we have it right? Yeah, about that unified theory of quantum gravity, Doctor...

    1. Re:Review != accept by mpe · · Score: 1

      Funny thing about (good) science - It doesn't simply dismiss new ideas simply because they disagree with existing theories.

      Nor dogmatically cling to "theories" in the face of evidence that they are at least incomplete.

      Oh, but for the first time in human history we have it right?

      Such an assumption does, unfortunatly, happen fairly frequently. Typically with at least one logical fallacy involved. Hence you end up with poor, junk even actual pseudo-science passed of as being good "science".

    2. Re:Review != accept by Anonymous Coward · · Score: 0

      It was barely over a hundred years ago that otherwise perfectly reasonable people were convinced that going over 35 miles an hour would be fatal, or that driving cars at all would kill women, despite lack of any actual science to back it up. Later it was 100 miles an hour that would kill you, then higher still. All proved wrong.

      In the history of human science, the first several ideas postulated by supposed experts often turn out to be dead wrong. It may even turn out that the standard model is wrong -in fact it probably is simply because human beings would have be pretty darn lucky, or smart, to get it all right. And we aren't usually that lucky and we sure aren't that smart. Surely a better idea will eventually come along.

      Whether this thing turns out to be something new we didn't (and don't) understand, or is something old we are misunderstanding, or complete fake, will probably come out in the wash.

      The one aspect I found most interesting, and which hasn't been mentioned, is the comparison between this concept and supposed UFO propulsion systems being EM in nature by methods and means we don't understand, with a very strong power source we don't have. If the alleged reverse engineering was actually going on, one might expect a weak device like this eventually falling out of the process as a poor attempt to emulate the technology. But ideas have to start somewhere.

  19. Experiment not the problem by pr0t0 · · Score: 5, Insightful

    It's the reporting. This wasn't a peer reviewed scientific discovery, and it didn't claim to be. It was just a paper that laid out how the experiment was done, and what the results were, nothing more. Just because IFL Science, like every other tech/science site, picks up the story and hints at trips to Mars in a matter of weeks, doesn't mean that's what the experimenters were claiming.

    This is how science works. You do experiments, you post your methods and results. Other scientists may do the same. If there is enough evidence that something may be at work, you do more. If you end up showing that everything we thought we knew about the universe was wrong, THEN YOU START CHANGING THE TEXTBOOKS.

    The law of conservation of momentum, like all scientific laws, comes with the caveat that our understanding of how the universe works is correct. They are not immutable. Given reproduceability, predictability, and strong empirical evidence, it probably is correct; but that doesn't mean it may not need "tweaking" in the face of new evidence. It could also be that no scientific principles are being broken here, it's just there's something else at play we don't understand.

    People who claim otherwise are really just religious zealots in a lab coat.

    --
    I'm sorry, but your opinion seems to be wrong.
    1. Re:Experiment not the problem by Mr_Nitro · · Score: 2

      that Sir is so good!!!! I am so fed up of IFLS websites with their zealots approach... science and expecially physics is _experiment based_ if they send the bloody drive in space and it moves... then as you said we change the goddamn textbooks. I am so fed up of these new armchair crusaders.....if someone is smart or lucky enough to come up with a crazy but working experiment he doesn't necessarily have to be able to explain the whole theory behind it, that could be someone else job. Sorry zealots but reality wins...always.

    2. Re:Experiment not the problem by cbhacking · · Score: 2

      Thank you. The hilarious thing is that this time, the zealots aren't even reading the report before "debunking" it. TFA (and, to be fair, lots of other sources) confused the recent NASA experiments on the Cannae Drive for experiments on the EmDrive. These are similar devices, but are invented by different people and their inventors claim different explanations for how they work. The actual inventor of the EmDrive (whose device was also tested, and produced more than twice as much thrust as the ~40 from the Cannae Drive as mentioned in TFA) is arguably vindicated by the result; having built something "different" but of basically the same design, it *also* produced thrust!

      Oh, and that "null" device? That was the lack of a supposedly-required feature on the Cannae Drive, without which it supposedly is inoperative. The *actual* EmDrive has never required any such modification (radial slots on the chamber). Shawyer (inventor of the EmDrive) is probably also wrong about how it works and or even whether it does... but not for the reasons that all the idiots - most of whom *don't* even have lab coats - are claiming.

      A good article refuting the claims of things like TFA (found by somebody else but worth reading): http://www.wired.co.uk/news/ar.... A more powerful test device is already in development and will be tried out at multiple labs on multiple apparatus. *THEN* we will see whether to change the textbooks...

      --
      There's no place I could be, since I've found Serenity...
    3. Re:Experiment not the problem by JasterBobaMereel · · Score: 1

      Exactly, this was a test to see if investigating the drive was worth pursuing at all, and if the the inventor was right about how it worked

      The outcome seems to be that as far as they can tell something is going on that might be interesting (but probably will not..) ..and the inventor is wrong on how it works

      If the drive is not exploiting some flaw in current theories, then it will turn out to be just a massively inefficient conventional drive, but if not it will be revolutionary

      --
      Puteulanus fenestra mortis
    4. Re:Experiment not the problem by Electricity+Likes+Me · · Score: 1

      *sigh*

      Nobody cares which drive it is, because they're both conical microwave waveguides which would violate fundamental laws of physics if they worked, being tested in ways which uniquely will fail to ever test the fundamental claim and have trivial explanations for the observed behavior.

      You can debunk by asking one simple question: did they test it in a vacuum? No? Then it doesn't matter what they saw unless they were producing staggeringly large amounts of anomalous force. You can get micronewtons out of the hot air coming off a CPU core.

    5. Re:Experiment not the problem by cbhacking · · Score: 1

      Ah, but can you get those uN to consistently point in the direction that the thruster is pointing? Can you explain why you get them off the thruster, but not off a resistive dummy load dissipating the same amount of heat?

      Don't get me wrong, they definitely need to test it in a vacuum. But saying "it doesn't matter what they say" is quite incorrect. The experiment was pretty thorough, it just used some components (for the power system, not the thruster itself) that won't work without atmosphere. They're working on a high-power version that will also work in vacuum.

      --
      There's no place I could be, since I've found Serenity...
  20. Bad Science by hackus · · Score: 1

    In otherwards, you can't make billions off of the infrastructure storing liquid hydrogen, billions off launch pad construction and maint contracts and most of all, nothing can go boom sp, instead of having to buy insurance and possibly building TWO in case of launch failure, there just isn't any good money....I mean good science in that or any idea that doesn't use rockets.

    Rockets=The Chinese were doing it long before we were and somehow nobody gets it that it is old hat.

    --
    Got Geometrodynamics? Awe, too hard to figure out? Too bad.
    1. Re:Bad Science by SuricouRaven · · Score: 1

      The thrust from these drives is far too low to launch with. You still need the big rocket to make orbit. Then you can switch to the new maybe-it-works drive. The acceleration is minuscule, but times that by a few months and you can still make a pretty good delta-V from it.

    2. Re:Bad Science by liquiddark · · Score: 1

      That depends,of course, on how well it scales. If you can get enough thrust from a small enough energy input, you can partially or completely remove the dependency on giant volatile chemical vats.

    3. Re:Bad Science by SuricouRaven · · Score: 1

      Given they are putting in kilowatts and getting hard-to-measure tiny thrust out... even if you improve it by five orders of magnitude, it's still not lifting the weight of the power supply from a 1G-surface planet.

    4. Re: Bad Science by liquiddark · · Score: 1

      They got micronewtons from watts, not kilowatts.

    5. Re:Bad Science by Neil+Boekend · · Score: 1

      The mass is relevant. The thrust/mass ratio has to be improved with a factor 1000 (wild guess) or so for it to be able to lift it's own weight.
      If it can lift it's own weight then it can accelerate with at least 1 g in space. Accelerate at 1 g for a year in space and you are quite close to 0.5 times light speed.
      That would be awesome, but I don't expect such improvements until we figure out how to do this with superconductors, preferably room temperature because it is difficult to shed heat in space.

      --
      Well, I might have a way, but it only works on a semi spherical planet in a vacuum.
  21. Does this mean... by Anonymous Coward · · Score: 0

    ... we might get an actual hoverboard before 2015?

  22. just stick one on a Cygnus supply vessel by Anonymous Coward · · Score: 0

    Orbital Sciences has a Cygnus supply vessel to supply ISS. Why not just stick on of those devices on a Cygnus, and see how long it takes to deorbit. An accurate test.

  23. Bad Science Reporting by Anonymous Coward · · Score: 0

    How many times have I read as a 'matter of fact' that curved (or warped) spacetime is responsible for gravity in online articles and made for TV science specials?

  24. what exactly is this "bad science"? by silfen · · Score: 5, Insightful

    How to fool the world with bad science

    What does that even mean? The Chinese reported some result, NASA tried to reproduce it, and didn't get very convincing results. Any halfway reasonable person looks at what was reported in the press and says "hey, nothing really to see here, they didn't really prove or disprove anything", to which one might add "how nice that people try some new and crazy stuff occasionally".

    Which part of that chain of events is supposed to constitute "bad science"? Who exactly is supposed to have been fooled? Which step along the way does Siegel consider "bad science" and why?

    Instead of making a rational argument for the cost/benefit of this particular experiment, Siegel goes off on some tangent about N-rays, supposedly illustrating the foolishness of some experiments. But there are many other cases where weird observations and experiments that most people thought never could work opened up entirely new areas in physics and biology. If one can learn anything from the history of science, it's that you should sometimes try crazy and foolish experiments because occasionally, they yield a big payoff.

    the impossible space engine that runs off of microwave power reflected inside a cavity

    Nobody knows whether reactionless drives are "impossible" or not; anybody who makes definitive statements one way or the other is a charlatan at this point, including Siegel.

    Sure, it violates the known laws of physics,

    The known laws of physics violate the known laws of physics, because they are not only incomplete but internally inconsistent. Somewhere along the line, you will have to do experiments whose results might violate the known laws of physics if you want to make progress.

    On the contrary, this is bad science because: The results are not robust, in that they are not identically-or-similarly reproducible by different teams.

    I still don't know what that "this" is that Siegel is referring to. How do you know that the results aren't reproducible or robust if you don't try to reproduce them?

    Siegel has the kind of dull mind that we don't want to teach our next generation of scientists or kids, and it is disturbing that guys like him are actually active in science education. Kids: try stupid things that violate known physics. Try things that sticks-in-the-mud like Siegel tell you don't work. And try to reproduce other people's experiments, both the ones that everybody believes and the ones nobody else could get to work.

    1. Re:what exactly is this "bad science"? by Anonymous Coward · · Score: 0

      "Siegel has the kind of dull mind that we don't want to teach our next generation of scientists or kids, and it is disturbing that guys like him are actually active in science education. Kids: try stupid things that violate known physics...."

      I agree with the general tone and insight and think in general, especially in regards to this specific situation, and I think he handled it poorly especially given his role.

      However, as a bit of context, while your words are entirely reasonable and sound, a variation of them is generally given by every single crackpot and fraudster (scientist or not) as to why their snakeoil should be taken seriously. "Yes, my wonder magic tonic may seem too good to be true, but haven't others things seemed too good to be true yet turned out to be true, so shouldn't you give me a few hundred million to keep testing?"

      When you are in the position of a gatekeeper of sorts between hard science and the public, you see way more of this than your average scientist or science nerd does. Every crackpot brings you their idea, and every person you know brings the idea a charlatan is peddling to them. After awhile, when 9999/10000 you are repeating why these things simply aren't workable so you shouldn't invest in a perpetual motion machine, you just kind of go into that mode on the 10001th time.

      Basically, I agree with you 100%, but his situation deserves a little more context.

    2. Re:what exactly is this "bad science"? by PPH · · Score: 1

      Somewhere along the line, you will have to do experiments whose results might violate the known laws of physics if you want to make progress.

      Agree. But this sort of thing opens up opportunities for a kind of denial-of-service attack on our science infrstructure. Crackpots in low wage countries publish dubious experimental results. NASA attempts to replicate, spending some multiple of what the original 'research' cost to produce. Money that could have been spent on something else.

      In the end, who wins this game?

      --
      Have gnu, will travel.
    3. Re:what exactly is this "bad science"? by silfen · · Score: 1

      Experiments on reactionless drives really are the least of our worries; those are so "out there" that they are not at great risk of replication unless they make a pretty good case for themselves.

      If there is a "denial of service attack" on science, it's health, genetics, psychology, economics, and social science studies; they are mostly wrong, meaningless, and often have costly and dangerous consequences. They don't even have "crackpot" theories behind them, they often have no theory at all behind them.

  25. Cold_emDrive_Fusion by Anonymous Coward · · Score: 0

    Seems the NASA quantum-naughts are on to something !

    Did the "revelation" occur after or before Colorado legalized weed !

    Ah. The NASA "emDrive" will be "smoking" for years to cum. ;-)

  26. Pretty easy to test by HangingChad · · Score: 1

    Just put a payload experiment in orbit and see if you can drive it around. If the scientists running the experiments accounted for the motion of waves on a beach five miles away, I'm pretty certain that makes it worth a payload slot. We could dick around down here for years arguing about whether the results are valid or not, or we could put one up there and try it.

    Sounds like the perfect cubesat experiment.

    --
    That's our life, the big wheel of shit. - The Fat Man, Blue Tango Salvage
    1. Re:Pretty easy to test by cbhacking · · Score: 1

      The problem with that idea (much though I'd love to see it) is that the current experimental apparatus - the one that produce only-barely-detectable thrust - is already much too large for a cubesat, and that's ignoring the need to power it. The Chinese tested a much more powerful version, but they had to use kilowatts of power to get that much thrust; again, the whole thing is way too big for a cubesat. You're talking a moderate-sized (and priced, by satellite price standard) satellite here, and you'd need something like a dedicated Falcon 9 launch to put it in orbit.

      Mind you, I'd love to see that launch. Hell, I'm sure Elon Musk would love to see that launch too; his dream of regular space traffic between Earth and Mars gets a lot more likely if he doesn't need to invent a new chemical rocket engine (which even then wouldn't make the trip nearly as fast as a scaled-up EmDrive might) and in the mean time, launching all the parts for such a ship (plus of course the early experimental platform) will need to be done with something that can reach escape velocity from the surface, and he just happens to have the cheapest way to do that. If it doesn't work, well, he's already working on the new engine anyhow. Win-win.

      --
      There's no place I could be, since I've found Serenity...
    2. Re:Pretty easy to test by Anonymous Coward · · Score: 0

      Sure the test units they are messing around with are fairly large, because the supposed effect is so small and there is too much noise (magma movement, magnetic fields, earthquakes, etc) here on earth to measure any possible thrust otherwise. This device basically sounds like it is a magnetron inside a specially designed metal tube, it should be easy enough to shrink it down to a cubesat experiment and in space they would simply have to point in the direction of the orbit and instruct it to run the "drive" whenever there was enough power. If it works its orbit will slowly raise over time, if not we know its crap. Maybe involve some college students & other experiments as well so its not a complete loss in the likely event that the "effect" is disproved.

    3. Re:Pretty easy to test by mbone · · Score: 1

      Propose it to the NASA Cubesat Launch Initiative.

  27. Some great quotes on statistics... by s.petry · · Score: 2

    "In earlier times, they had no statistics, and so they had to fall back on lies". -- Stephen Leacock

    "Statistics: the mathematical theory of ignorance." -- Morris Kline

    "Facts are stubborn, but statistics are more pliable." - Mark Twain

    "Torture numbers, and they'll confess to anything." - Gregg Easterbrook

    And of course..

    "42.7% of all statistics are made up on the spot." -- Steven Wright

    --

    -The wise argue that there are few absolutes, the fool argues that there are no probabilities.

    1. Re:Some great quotes on statistics... by wonkey_monkey · · Score: 1

      "People can come up with statistics to prove anything. Forfty percent of all people know that." - Homer Simpson

      --
      systemd is Roko's Basilisk.
  28. Yep. by Sir+Holo · · Score: 2

    Yes, N-rays were a false pursuit. (See book "Diamond Dealers and Feather Merchants")

    Cold fusion also. The palladium was soaking up hydrogen, which the original experimenters (Pons & Fleischmann?) misinterpreted as demonstrating room-temperature cold fusion.

    The public needs understand that un-refereed reports are not fact. Further, even refereed journal articles are not fact. It is only after others reproduce experiments and find confirming results that we get closer to "fact." Even then, it's just "confirmed theory."

    Why the popular press loves to breathlessly report on recent journal articles as "fact" only confuses the matter.

    1. Re:Yep. by Horshu · · Score: 1

      "Why the popular press loves to breathlessly report on recent journal articles as "fact" only confuses the matter." I take it you don't believe that a 13 year old girl will revolutionize battery power with her science fair project?

    2. Re:Yep. by matfud · · Score: 1

      Sir Holo,
      Thanks for the book reference. It sounded interesting so I just bought a copy.

    3. Re:Yep. by Sir+Holo · · Score: 1

      It's a fun read.

      Enjoy.

  29. BLINDED BY ARROGANCE by Anonymous Coward · · Score: 5, Informative

    It's sad how pathetic the pretenders on Slashdot are sometimes. So full of themselves and sure that they are smarter than the next guy.

    I know it's appeal to authority, but NASA doesn't employ idiots. And if you had bothered to do even a simply Google search you would have found this which sheds some more light on the situation.

    Just to save you the effort, the abstract sucks (most likely written by a public relations flunky), they were very careful in setting up the experiment, it WAS done in a vacuum, there is something there. Note that they didn't explain it, they just report their observations.

    But you go ahead and stick with your second year physics student attitude.

    1. Re: BLINDED BY ARROGANCE by Anonymous Coward · · Score: 2, Informative

      Appeal to authority is only a fallacy in a deductive argument, so there's no need to qualify. If appeals to authority were all that bad, people wouldn't go to see doctors when they got sick or to mechanics when their cars broke down. We trust authorities because of a web of beliefs we have about education, certification or licensing, the incentives professionals face to render the best available guidance, etc.

    2. Re: BLINDED BY ARROGANCE by Anonymous Coward · · Score: 0, Insightful

      I trust my doctor because I can verify that he knows what he is talking about. Same with my mechanic. If you trust these people blindly because of their "authority", you're a fool.

    3. Re:BLINDED BY ARROGANCE by Anonymous Coward · · Score: 0

      Exactly - The guy who wrote the article certainty doesn't understand 'bad science' if he thinks this experiment was such.

      His reasons for it being bad science;
      "The results are not robust, in that they are not identically-or-similarly reproducible by different teams."
      I believe they made conditions are repeatable as they possibly could, i'm not sure why this claim is made?

      "The results are not significant, in that they are not distinguishable from a setup that should give a null result."
      The results of science does not make the science bad....????? What an imbecile.

      "And even if the results were significant (and they are not), they are too close to the minimum threshold of detection to warrant the claims of “discovery.”
      No discovery is being claimed.... Initial experiment has reported interesting effects and further can now be justified.

      Bad science? Bad article more like it.

    4. Re: BLINDED BY ARROGANCE by Anonymous Coward · · Score: 0

      He's also dead wrong. The null device had physical modifications to its internal structure, however those were specifically tied to the theory behind that particular device. The null device was still em resonant cavity, it just didn't have the slits sling the edges. The guy who wrote this article may ultimately be correct about this being a sham, but his reasoning is just as big a sham.

    5. Re: BLINDED BY ARROGANCE by Anonymous Coward · · Score: 0

      What are you talking about? Appeal to authority in order to try to give weight to one hypothesis over another is absolutely and utterly flawed to the extent that someone using such a tactic has his credibility fundamentally undermined.

      This has nothing whatsoever to do with the fact that expertise exists. Experts can give weight to a hypothesis they support by giving actual evidence in favour of the hypothesis - that is after all why they support it. It's amateurs who want to seem like experts who use appeals to authority.

    6. Re: BLINDED BY ARROGANCE by Anonymous Coward · · Score: 1

      Your example is flawed, we go to doctors and mechanics because they are experts, not authorities.

    7. Re: BLINDED BY ARROGANCE by dywolf · · Score: 2

      No. Fallacies are not automatically incorrect. They are, in most cases, only *potentially* incorrect.

      In the case of Appeal to Authority, the phrasing itself is misleading, because the actually fallacy, the actual problem, using comes from citing a non-authority as an authority. IE, its really an Appeal to an Inappropriate Authority.

      --
      The guy who said the election was rigged won the presidency with the second-most votes.
    8. Re: BLINDED BY ARROGANCE by dywolf · · Score: 3, Insightful

      you just described what the other guy said about certifications, licenses and education.
      you're saying the same thing, while disagreeing with him.

      --
      The guy who said the election was rigged won the presidency with the second-most votes.
    9. Re:BLINDED BY ARROGANCE by Anonymous Coward · · Score: 0

      I know it's appeal to authority, but NASA doesn't employ idiots.

      Yes, it is an appeal to authority. NASA employs thousands of people spread over many centers. In any organization of that size (or ANY size, for that matter), you have your smart people and your idiots and everyone in between. Some of these centers are set up and/or supported with pork funding, which means that there is plenty of opportunity to do "bad" research. NASA has had its share of "free energy" or "zero-point physics" people, anti-gravity people, psychic believers, etc., etc., etc. I've worked with some of the guys who were the first and biggest proponents of the "Face on Mars," and one of them worked at NASA and the other has done his fair share of research with NASA funding. I don't know anything about the NASA people and contractors whose names are on the conference paper. I quick look in the NASA publication database turned up very few references for me, at least with having to do with this kind of research, which (to me) suggests they are junior researchers and/or new to this field.

      When I first saw the article about the conference paper, I assumed it must have come out of the Glenn center because I thought that is where the thruster researchers were. However, it is out of the Houston center, out of a newly-establlished thruster lab (combine shiny new lab that somewhat duplicates what is at a different center, with Houston, that really smells like pork). I don't know anything about these guys. Maybe they have been careful and diligent, maybe not. Maybe they set up their experiment well, maybe they're not very familiar with their instrumentation. The magnitude of what they say they've measured is very small. I find it to be just as arrogant to cast aspersions on people who have criticisms of this research and technology because it threatens their "brilliant little guy being held down by The Man" narrative.

      You can't have thin skin to work in research science and engineering. The process is meant to be based on skepticism and if you can run the gauntlet with the core of your results intact, you've done very well. The larger your claim is to extending into new physics, or overturning physics, the more scrutiny you'll receive and the harsher your criticism will be. It is meant to be this way.

    10. Re:BLINDED BY ARROGANCE by sycodon · · Score: 3, Insightful

      Science is a process.

        If you execute the process badly, that's "Bad Science".

      If you execute the process correctly, or at least as best you can given the known parameters, etc. then you can't call it "Bad Science", even though the results are unexpected and controversial. I would expect that even the most cynical observer would be curious as to what is happening here.

      Since his article contained several factual errors related to how the experiment was conducted, it is obvious that he did not even read the full report but just the POS Abstract or even worse, various news accounts.

      So actually, HE is the one engaging in Bad Science Reporting.

      --
      When Fascism comes to America, it will call itself Anti-Fascism, and tell you to give up your guns.
    11. Re:BLINDED BY ARROGANCE by Wraithlyn · · Score: 2

      The really dumb part is how they look at the "null device" showing a positive result, as somehow being evidence that there is no positive result.

      What it really means they don't understand the effect enough. They had a hypothesis (from the Cannae inventor) that these carved grooves in the sides of the chamber were what caused the thrust. So they tested that hypothesis. The hypothesis turns out to be incorrect. That's how science works. It doesn't disprove the observed effect itself. It means we have to do more testing to get a better understanding of what is going on here.

      Skepticism is good and healthy and all, but we have multiple independent teams getting something here, and that deserves further investigation. Is it possible there is some problem with all the results? Of course! Does that mean we should ignore these results and dismiss them because "we know it can't work"? ABSOLUTELY FUCKING NOT.

      (Oh, and the parent is incorrect about them performing the testing in a vacuum.. they couldn't because some of their equipment couldn't handle it, full vacuum testing is indeed planned for the next slate of tests)

      --
      "Mind, as manifested by the capacity to make choices, is to some extent present in every electron." -Freeman Dyson
    12. Re: BLINDED BY ARROGANCE by Woek · · Score: 1

      Thank you for this!

    13. Re:BLINDED BY ARROGANCE by azav · · Score: 0

      its* appeal to authority


      it's = it is.

      Learn this.

      --
      - Zav - Imagine a Beowulf cluster of insensitive clods...
    14. Re:BLINDED BY ARROGANCE by sycodon · · Score: 1

      "I know it is appeal to authority..."

      or

      "I know its (possessive) appeal to authority..."

      The first has a missing word, but is still more accurate than the second since "I know" cannot possess anything.

      --
      When Fascism comes to America, it will call itself Anti-Fascism, and tell you to give up your guns.
    15. Re: BLINDED BY ARROGANCE by Anonymous Coward · · Score: 0

      A fallacy is an error of logic. It is incorrect.

      An appeal to authority happens when you say something is absolutely correct because some perceived authority figure (whether or not they're genuine) said so. It might be a *good idea*, based on evidence, to trust the authority figure, but saying they're right because of who they are is logically fallacious.

    16. Re: BLINDED BY ARROGANCE by dywolf · · Score: 3, Insightful

      then you misunderstand fallacies.
      nearly every defined fallacy has a condition or conditions easily satisfied in which the original statement is correct and not fallacious.

      "Correlation is not causation" is hte biggest one you see on slashdot. its a warning, a guide, but its not true 100% of the time. sometimes correlation IS causation. or really whats happening is its saying "hey, there might be something here, we need to look further...but careful, it could be coincidence"

      Appeal to Authority is another that can easily have situations in which its not automatically wrong. and its exactly as I said: the fallacy usually arrives from citing a non-authority as an authority. "I'm not a scientist, but Bobby over there tells me GW is a hoax." Now unless Bobby-over-there is a phd in climatology and current in the field, and not funded by oil companies....he may not qualify. But if Bobby IS that current, established, and well regarded phd, then his opinion on the science and evidence ABSOLUTELY does carry more weight than a non-experts, and its not fallacious in nature, merely potentially so until you know his background and reasoning. we appeal to authority because we are not experts. but if we cant cite experts and automatically wrong for doing so, then either you're doing the work of the ignorant for them, or we must all become experts at everything.

      --
      The guy who said the election was rigged won the presidency with the second-most votes.
    17. Re: BLINDED BY ARROGANCE by Anonymous Coward · · Score: 0

      Quote:

      "An argument can be fallacious whether or not its conclusion is true."

      The number one mistake of amateur logicians is to think that fallacies affect the factual accuracy of the argument being made. They do not.

  30. Science needs experimental data by Dereck1701 · · Score: 1

    To scientifically prove/disprove something you need experimental data, which is exactly what NASA seems to be doing in this case. The results are less than stellar but as long as they are not burning any significant amount of money whats the issue? If we really want to know if this thing works or not just put it in a small cubesat and piggyback it on another satellite launch, if it can change its orbit then we know it works, if it can't we know its useless. Again no significant amount of resources should be expended and the inventors shouldn't profit in any way until the effect is proven, but sometimes the most astounding discoveries start out as a little unexplained quirk that someone plays around with.

  31. Closed system NOT! by Anonymous Coward · · Score: 0

    Just remember, a power (nuclear electric) is the input, microwaves, or whatever else (remember heat exchanger panels voyager) are the output. Yes you must follow conserve rules. But you have free input to give off. It ain't just a closed circle around the microwaves, duh. I'm investing in this.

    1. Re:Closed system NOT! by Immerman · · Score: 1

      Sure, conservation of energy is maintained, but conservation of momentum is *not*, at least not according to the currently accepted standards (though the relativistic analysis or virtual plasma or something else might possibly be able to maintain it)

      Though given the miniscule thrust measured you could be right, it could be, like the Pioneer anomaly, the result of radiation pressure. In which case this would be a very bad investment - there's much more efficient ways to harness radiation pressure as a thrust source than accidental leakage. Still not efficient enough to actually be useful without a low-mass fusion reactor on board though.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
  32. The article is flat-out wrong. by cbhacking · · Score: 5, Insightful

    Oh for fuck's sake... Time to debunk this shit, again.
    TFA got it wrong as well, so I suppose I can't blame you people for getting it wrong too, but please try doing a little more research?

    A little background: The EmDrive was invented by a guy named Shawyer. It was tested by NASA, among others, and found to produce about 91 microNewtons. (I'll address the 30-50 that TFA talks about too.) That's way less than the Chinese found, but NASA was also testing it at much lower power and say they are planning to test a higher-power version.

    The article mentions "... and a third person, Guido Fetta, have built three separate versions of the EmDrive". This is wrong, at least according to Fetta. Fetta invented what he calls a "Cannae Drive" (http://en.wikipedia.org/wiki/EmDrive#Cannae_drive) which resembles an EmDrive but supposedly works on a different principle. In particular, Fetta believes that his drive requires radial slots in the chamber to operate. To test this, two versions of the Cannae Drive were (also, separately from the EmDrive test) tested by NASA: one with and one without the slots. Those tests both produced the same thrust (30-50 microN, about half what the EmDrive produced), which disproves Fetta's theory as to how the Cannae Drive is supposed to work.... and nothing else.

    The null test device that everybody is so dismissedly claiming claiming disproves the EmDrive wasn't even supposed to be an EmDrive! Fetta, inventor of the Cannae Drive, was disproven. Shawyer, inventor of the EmDrive, was actually vindicated because according to his theory, the Cannae Drive (slots or no) is basically an inefficiently-shaped EmDrive.

    I don't know why this is so hard for people to understand.

    --
    There's no place I could be, since I've found Serenity...
    1. Re:The article is flat-out wrong. by edcalaban · · Score: 1

      I don't know why this is so hard for people to understand.

      Because they don't read anything other than the sensationalized articles.

  33. Another case, perhaps? by fyngyrz · · Score: 1

    The trick to making a good spaceship engine is converting energy efficiently into ship momentum. As far as we know this means creating high-momentum exhaust;

    If one considers gravity in our nominal 3d space, isn't it correct to say that gravity imparts momentum without anything comparable to "high momentum exhaust"?

    Serious question -- the physics are beyond me, but the curiosity isn't. :)

    --
    I've fallen off your lawn, and I can't get up.
    1. Re:Another case, perhaps? by cbhacking · · Score: 2

      A little background (good question): To the best of our knowledge, there's no such thing as gravity "on" something; all gravity is *between* things. Think of it like magnetism (in fact, if you change the constants and swap charge and mass, the formulae for computing magnetic attraction and gravitational attraction are the same). When the Earth's gravity imparts momentum to an object (an apple you drop, say), the apple's gravity imparts the same momentum on the Earth. Of course, since momentum is mass times velocity, and the Earth masses ludicrously more than an apple, the delta-V of the Earth is basically imperceptible. Momentum is still conserved, though.

      Now, as far as a space drive goes... we can't use gravity as a drive right now, because it always just pulls towards nearby massive objects (and because we can't control it in any way). We can accelerate using gravity - you've probably heard how some space probes would "slingshot" around massive planets to gain a lot of speed on a different vector - but in order to do that we first need an acceleration that we create ourselves, so that we don't just fall straight down the gravity well.

      So yes, gravity imparts momentum (to both spacecraft and the planets they slingshot around) without *itself* involving a high-momentum exhaust... but only because the spacecraft already had a lot of momentum in the correct direction for the maneuver. Getting *that* momentum has, so far, always required an exhaust.

      There are other options for generating thrust in space - light drives (the "exhaust" is just massless photons) and solar sails (where the high-momentum particles come from something else, like a star), for example - but neither are currently practical. Of course, even if the EmDrive happens to really work (which the experiments support but have definitely not yet proven) it isn't yet practical either. NASA has tested a *lot* of experimental drive types. However, at this time, all of the ones that have actually flown are reaction drives (throw something out the back of the ship, get an equal and opposite reaction forward). That may change at some point in the future, though.

      --
      There's no place I could be, since I've found Serenity...
    2. Re:Another case, perhaps? by penguinoid · · Score: 1

      If one considers gravity in our nominal 3d space, isn't it correct to say that gravity imparts momentum without anything comparable to "high momentum exhaust"?

      This is the principle behind the "slingshot" maneuver, which allows you to transfer momentum to a planet without using fuel. It can be used to speed up your ship or slow it down, depending on whether you pass behind or in front of the trajectory of the planet. (I suppose you could count the planet as being a portion of your exhaust) However, you have to be much less picky about where and when you're going, because this maneuver requires a planet. However, it is sufficiently worthwhile that scientists are willing to wait decades for the right planetary alignments for certain missions.

      --
      Don't waste your vote! Vote for whoever you want, unless you live in a swing state it won't matter anyways
    3. Re:Another case, perhaps? by delt0r · · Score: 1

      Are you falling toward earth or is earth falling up to you? In reality its both. That is why momentum is conserved. In fact conservation of momentum follows from the fact that you can only have forces * between* things and that they are opposite, ie pull together, push etc. Things here can also mean photons.

      --
      If information wants to be free, why does my internet connection cost so much?
    4. Re:Another case, perhaps? by fyngyrz · · Score: 1

      So I think the answer to what I was thinking is in the "the apple imparts the same momentum to the earth" bit.

      Although... I'm having a lot of trouble seeing the apple pulling on the earth as hard as the earth is pulling on the apple. How could it?

      The thrust (ah ha ha) of my question was observing there is, viewed in 3D terms, a force that acts across a vacuum without intermediary "thrown" particles. So the implication is, at least to me, that another such force might be possible. No?

      --
      I've fallen off your lawn, and I can't get up.
    5. Re:Another case, perhaps? by fyngyrz · · Score: 1

      ok, but that's not really what I was asking, or at least, if it was, I'm confused.

      Let me try again: Gravity acts across a vacuum without having imparted momentum to intermediary particles.

      Could there not, conceptually at least, be another force that can act across a vacuum, perhaps to a local mass or a distant one, or to something else entirely, that does not require spitting particles out the spaceship's tail?

      --
      I've fallen off your lawn, and I can't get up.
    6. Re:Another case, perhaps? by delt0r · · Score: 1

      There is nothing magic about the fact there is nothing in between you and the planet. All forces act over a distance. When i want to push a ship, i must push against something else. Sure that something else does not need to be on the ship to conserve momentum. I could perhaps invent anti gravity and push against a planet that is near. We don't know how to do that, but such a thing would conserve all the laws we generally assume will never be broken.

      So short answer, Yes. However no such force has been found or postulated in any realistic fashion.

      --
      If information wants to be free, why does my internet connection cost so much?
    7. Re:Another case, perhaps? by ceoyoyo · · Score: 1

      All (known) forces are between two charge carriers: electric charge for electromagnetism, mass for gravity, colour for the strong force, etc. You can use electromagnetic interactions to accelerate mass out the back of your rocket and because of that force symmetry the result is that your rocket accelerates in the opposite direction. You can drop a rock and it will accelerate towards the Earth, but the Earth also accelerates towards the rock. The symmetry means that momentum is conserved. Essentially, in order to change your momentum, you need something to push (or pull) on, thereby changing it's momentum, conserving total momentum.

      For a reactionless drive you want to be able to change your momentum without pushing or pulling on anything. That idea has all sorts of problems. One of the proposed mechanisms for the EM drive is that it isn't actually reactionless at all: the asymmetric design of the drive canister causes the microwaves to push asymmetrically on the sea of virtual particles that are always popping up and annihilating. So the drive actually would have an exhaust, it would just be virtual particles that were encountered along the way instead of fuel you brought along.

    8. Re:Another case, perhaps? by Immerman · · Score: 1

      Think of it kind of like a massless spring connecting a tiny object to a huge object - the tension in the spring, a.k.a. the force pulling the two objects together, will be the same at both ends of the spring, and both objects will move toward each other. But the force that sends the tiny object careening towards the huge one will barely budge the huge one.

      Nevertheless momentum is conserved. Let's say the huge object is one billion times times more massive than the small one. The same force will thus cause one billion times less acceleration (F=ma, or a=F/m) and the change in speed will be one billion times smaller (deltaV = at). When we look at the momentum of the huge object we'll thus get
      momentum change = (deltaV_huge) * (mass_huge)
      substituting with the relationship to the tiny object (one billion times slower, and one billionth times the mass) we get
      = (deltaV_tiny / one billion) * (mass_tiny * one billion)
      = deltaV_tiny * mass_tiny

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    9. Re:Another case, perhaps? by Rockoon · · Score: 1

      Although... I'm having a lot of trouble seeing the apple pulling on the earth as hard as the earth is pulling on the apple. How could it?

      How could it not?

      I think the fundamental problem here is that you don't accept that the force is mutual. There arent two forces (one pulling on A and the other pulling on B) .. there is a single force between the two (the force between A and B) ..

      Its what happens when the force is applied that reveals the differences you observe. In plain english what we call inertia is an objects resistance to changes in motion. Objects with more mass have more inertia. The earth resists changes in motion far greater than the apple does. So while the force between Apple and Earth is a single thing, the acceleration imparted is not equal.

      After all,

      force = mass * acceleration

      ...with a little algebraic voodoo, this becomes

      acceleration = force / mass

      --
      "His name was James Damore."
    10. Re:Another case, perhaps? by Cito · · Score: 1

      And if you slingshot around the sun you go back in time.

      At least Star Trek taught us that :-P

    11. Re:Another case, perhaps? by fyngyrz · · Score: 1

      ok, I see it now -- you're exactly right, I was seeing it as two forces. Thank you!

      --
      I've fallen off your lawn, and I can't get up.
    12. Re:Another case, perhaps? by fyngyrz · · Score: 1

      That was also very helpful to my conceptual model. Thank you kindly.

      There are some very sharp people on slashdot. :)

      --
      I've fallen off your lawn, and I can't get up.
    13. Re:Another case, perhaps? by fyngyrz · · Score: 1

      So short answer, Yes. However no such force has been found or postulated in any realistic fashion.

      So conceptually, a drive might exist, compliant with the science we know, that does not push stuff out the back of the ship, but instead, acts on something else, somewhere else. As long as it acts on *something*, yes?

      --
      I've fallen off your lawn, and I can't get up.
    14. Re:Another case, perhaps? by Anonymous Coward · · Score: 0

      The amount of force exerted on the apple is identical to the amount of force exerted on the Earth. The Earth is billions of times more massive than the apple. Mass could be defined as a resistance to changes in momentum.

      In short moving the earth towards the apple would require alot more force due to the earths resistance to being moved.

    15. Re:Another case, perhaps? by Anonymous Coward · · Score: 0

      All the fundamental forces (it used to be 4, but I think we're down to 2) act across a vacuum without requiring intermediate particles. In fact, the forces are going to be acting on any particles that happen to be intermediate. The forces are also omnidirectional, so in theory you could use Alpha Centauri's gravity to pull your ship towards it, but you'd have to get close enough that Alpha Centauri's gravity is much stronger than the gravity of everything behind you. There's no way to create a gravitational field (or magnetic field) that would pull you to a specific distant object, unless it's the closest object in range.

      It's possible (but really, really unlikely) that there's a fundamental force we've missed, which would translate across a vacuum, but it's hard to imagine how that would allow us to 'ride the wave' to someplace distant. Note that generating a field requires energy and it would be tremendously inefficient to generate an omnidirectional field to pull yourself in a specific direction. You'd be wasting more than 99% of that field strength, in which case it's probably more efficient to just bring rocket fuel.

    16. Re:Another case, perhaps? by ceoyoyo · · Score: 1

      I recognize your username I think I've been able to answer one of your questions before. They're interesting, and you've got a great way of asking for clarification if you don't like the answer you get. Reminds me of the nineties on Slashdot. ;)

    17. Re:Another case, perhaps? by delt0r · · Score: 1

      Yes. But this drive claims to use EM force. We understand that the best.

      --
      If information wants to be free, why does my internet connection cost so much?
  34. Chill by whodunit · · Score: 1

    I remember being fascinated by the initial reports of the EmDrive years ago, and I was very, very frustrated that so-called "scientists" preferred to sneer at it and declare it impossible rather than pursuing such a fascinating possibility with, you know, those things they call experiments. I thought that's what scientists did - explore new things, chase the frontier - and that the potential to learn something new, the potential that there was a previously overlooked mystery right under their noses, would be unbearably exciting for them.

    How hard is it to build one of these damn things, strap it to a lab bench, and test it? And then test it in a vacuum, underwater, upside down, in a house, with a mouse, with green eggs and ham, etc? Isn't that what scientists are paid to do? Test things? Over and over, under every conceivable scenario? The test these fellows did is great and all, but it should have been done years ago. If the EmDrive and its permutation(s) are bullshit, then why wasn't it killed and buried years ago, with the inescapable power of repeatable experiments and test results? We spend millions trying to detect cosmic particles that aren't there, and then spend MORE millions to NOT detect those cosmic particles to a greater degree of accuracy, but nobody can be fucking arsed to strap a microwave gizmo to a lab bench, flip a switch, and see if this is a world-shaking breakthrough or just another sad data mistake? Thanks for nothing, poindexters.

    1. Re:Chill by Sobrique · · Score: 1

      There are plenty of things that persist despite not being scientifically valid. Like homeopathy, for example.

    2. Re:Chill by St.Creed · · Score: 1

      The placebo effect is well documented and scientifically valid. The name it goes by is only relevant due to the way it enforces said effect. And saying placebo effects are useless is silly: it's much better to have someone cured from a placebo than from chemicals (or hormones), especially when dealing with children where the final effects of hormones and chemicals are not all that well understood.

      --
      Therefore, by the (faulty) logic you're using, you're just a cow with a keyboard - osu-neko (2604)
    3. Re:Chill by serviscope_minor · · Score: 1

      was very, very frustrated that so-called "scientists" preferred to sneer at it and declare it impossible rather than pursuing such a fascinating possibility with, you know, those things they call experiments.

      Well volunteered! So you found a group of like minded people to look at it, or put your own time and money in right? Right?

      Or are you disappointed that a bunch of people you don't know aren't spending their time doing something you wanted them to do rather than something they wanted to do?

      I thought that's what scientists did - explore new things, chase the frontier - and that the potential to learn something new, the potential that there was a previously overlooked mystery right under their noses, would be unbearably exciting for them.

      Yep that's exactly what they do and they'd rather actually do that than waste time chasing unicorns.

      There are thousands of free energy and antigravity breakthroughs on Youtube. Every single one would be an overlooked mystery under everyone's nose and unbearable exciting IF it worked. But none of them do.

      If "scientists" (seriously who? they? them? the government? private people? who?) jumped on every "exciting new descovery which breaks the laws of physics", they's spend their entire lives debunking bullshit and none inventing new stuff and doing science.

      How hard is it to build one of these damn things, strap it to a lab bench, and test it? And then test it in a vacuum, underwater, upside down, in a house, with a mouse, with green eggs and ham, etc?

      I don't know. Not very. Feel free to do it yourself. It's science. No one's stopping you.

      Isn't that what scientists are paid to do? Test things? Over and over, under every conceivable scenario?

      No. Scientists are not paid to test random shit of the internet over and over in every conceivable scenario. They are paid to descover new things.

      Thanks for nothing, poindexters.

      You have a very overdeveloped sense of entitlement.

      --
      SJW n. One who posts facts.
    4. Re:Chill by Electricity+Likes+Me · · Score: 1

      The placebo effect doesn't cure actual disease. It's controlled for because when you give someone anything, chances are they change a lot of their behavior and state of mind, and we know those things have actual impacts on the way the body reacts to stressors. But it won't result in a colony of bacteria tearing through your stomach to actually die off.

      No doctor prescribes placebos, and we don't plan on treating people with placebos. We worry about them, especially because in cases of looking for improvement rather then easily quantifiable effects, its a big deal, and also because we know even with quantifiable effects, a subset of the population are likely to clear up an issue regardless of intervention.

    5. Re:Chill by Neil+Boekend · · Score: 1

      Placebo's are not suitable for all cases. However, they are suitable for some. They are even the best for some.
      You can't treat cancer with placebos. You can treat the side effects of chemo with placebos (to some extent).
      You can cure many types of headaches, migraines, concentration disorders and many other things with placebos. If the placebo is selected properly the side effects are minimal. If the placebo is presented properly the nocebo effects are minimal.

      Some doctors do use placebos, because they are sometimes the best way to go. A low density vitamin C tablet from the pharmacy can cure a lot more than vitamin C deficiency. Especially if it is not covered by insurance. Especially if it is expensive.
      There is, however, a stigma to it because the most effective method requires lying to your patient. Even if that is the best way to cure them it feels iffy to any half decent doctor.

      There is value in homeopathic stuff: it is expensive and does no harm (except to the wallet).
      I wish I could go back to believing in it because that would help me in some areas. Alas, that ship has sailed.

      --
      Well, I might have a way, but it only works on a semi spherical planet in a vacuum.
  35. The Relativity of Wrong by TapeCutter · · Score: 1

    So the earth really was flat for awhile?

    To the limits of measurement at the time, yes From the link - Nowadays, of course, we are taught that the flat-earth theory is wrong; that it is all wrong, terribly wrong, absolutely. But it isn't. The curvature of the earth is nearly 0 per mile, so that although the flat-earth theory is wrong, it happens to be nearly right. That's why the theory lasted so long

    --
    And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    1. Re:The Relativity of Wrong by letherial · · Score: 2

      All he really is pointing out is the ignorance of man. We believed it was flat for so long simply because we could not see a curve, but yet it still existed and its still a ball. You cannot have a flat ball. If you look at it from a distance you dont wonder if its a flat land or a round ball. It isnt nearly right, its completely wrong and only human ignorance would say it was 'nearly right'

      No it was very much 100% wrong, nearly zero is not zero. Thats like saying 2+2 is nearly 5, its technically true, but utterly wrong, math is absolute.

    2. Re:The Relativity of Wrong by AthanasiusKircher · · Score: 2, Insightful

      It isnt nearly right, its completely wrong and only human ignorance would say it was 'nearly right'

      No it was very much 100% wrong, nearly zero is not zero.

      I suppose you're also absolutely opposed to teaching Newtonian mechanics to intro physics students, too -- right? I mean, after all, we now know it "was very much 100% wrong." Sure, relativistic effects are basically irrelevant at normal speeds, but "nearly zero is not zero." So, we need to revamp our physics curriculum and introduce full-blown Einsteinian space-time to our students immediately on their first day... who cares if they won't have the math to do much with it, or if they'll never be able to do a lab experiment in the physics classroom with sufficient precision to display relativistic effects? We know Newton was "100% wrong," so let's stop teaching our students that ignorant nonsense!

      Of course, I'm being sarcastic here. Why do we still teach Newton when we know it's "wrong"? Because it's a good enough approximation for most purposes. Most of the measurements we take in everyday life will never require us to take relativistic effects into account, because most of our everyday measurement devices don't have sufficient precision to even show those effects at normal speeds. In effect, Newton's theories make sufficiently good predictions for everyday purposes, so we still teach them.

      That's the point of science -- to make good predictions. We can now teach Newton to do physics at normal speeds in everyday life, but we have caveats that say, "If you're going too fast or if you're in an intense gravitational field or... well, you need a better model." Science is not about debates concerning the ultimate nature of reality; it's a tool.

      And we do the exact same thing with the flat-earth model. We use maps all the time, which are generally projected onto a 2-D surface. All 2-D projections of the earth have flaws -- they either screw up distance or distort shapes or area in some way or whatever. And maybe that's an argument to use more globes and computer simulations of globes for students (since many map projections are very misleading)... but we still have little reason to worry about this when we're looking at a map of a small area unless we're firing long-distance projectiles or doing complicated surveying or something.

      Science is a tool, and we use a model that has sufficient accuracy for the task. At one time, we didn't have sufficient tools or applications to worry about the curvature of the earth, so for scientific purposes it was irrelevant. The models weren't "100% wrong" -- they were merely sufficient for the necessary accuracy. Same thing with Newton.

      Science is not concerned with questions about the ultimate nature of reality -- that's something for philosophy or religion or something. It's not really concerned with whether claims about that ultimate reality are "right" or "wrong" or whatever -- what matters is that we can have a sufficiently predictive mathematical model. For some purposes, the flat earth model was reasonably good... which -- as Azimov pointed out in the GP's link -- is why smart people made use of it for so long.

    3. Re:The Relativity of Wrong by blue9steel · · Score: 1

      No offense to our ancestors but anyone who climbed a mountain and held up a straight edge against the horizon would notice that it's not flat. I've seen this myself.

    4. Re:The Relativity of Wrong by dfsmith · · Score: 1

      Clearly mountain climbing bends straight edges; because the horizon is flat* at the bottom. Maybe it's a property of wood at high altitude? B-)

      * Well, bumpy. With trees and (probably) mountains too.

    5. Re:The Relativity of Wrong by david_thornley · · Score: 1

      Wrong. Any sailor who lost sight of shore knew the world couldn't be flat. Stand on the shore, and observe a ship heading out to sea. You'll notice that it gets obscured from the bottom up. It's not an effect of wave action being increasingly visible against a ship that looks smaller.

      Not to mention that, at the very beginning of what developed into scientific inquiry, philosophers had a reasonably accurate measurement of the Earth's circumference. Since then, both mariners and educated people knew it was round.

      Columbus based his attempt to reach the Indies on a ludicrously small value for the circumference. Nobody laughed at him for thinking the world was round, but rather for using a value that had been known as too small since the ancient Greeks. Due to dumb luck, he found land that nobody in Europe had known about.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
  36. Front page news huh? by Trogre · · Score: 2

    I haven't seen any of the articles, but I'm guessing the news about it has been spread in this fashion:

    Rocket companies hate this. NASA has built a new type of engine using a simple trick. You will NEVER believe what happened when they switched it on. When I saw it, my mind was blown!
    (Photo with a couple of red circles around guys in lab coats)

    --
    "Nine times out of ten, starting a fire is not the best way to solve the problem." - my wife
    1. Re:Front page news huh? by Anonymous Coward · · Score: 0

      I haven't seen any of the articles, but I'm guessing the news about it has been spread in this fashion:

      Rocket companies hate this. NASA has built a new type of engine using a simple trick. You will NEVER believe what happened when they switched it on. When I saw it, my mind was blown!
      (Photo with a couple of red circles around guys in lab coats)

      Care to talk about the Kennedy assassination? 9/11?

    2. Re:Front page news huh? by david_thornley · · Score: 1

      OK - since this violates certain physical laws, it probably means others don't apply, so we can investigate to see if the 9/11 attacks caused Kennedy's assassination. Happy now?

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
  37. Republic of science by TapeCutter · · Score: 2

    Insightful? - Seems like the new generation of slashdotters have never heard of Karl Popper, much less what he had to say about the "Republic of science" (AKA scientific consensus). The whole idea of peer-reviewed publications and repeatability is aimed at arriving at a consensus among peers. Without it, all you're left with is an appeal to the authority of individual scientists, naturally the authority you pick will be the one that's telling you what you want to hear, therefore Science (with a capital 'S') will fail to progress, and stop being so damned useful.

    --
    And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
  38. So instead of being a reactionless drive ... by Ihlosi · · Score: 1

    ... it conjures its reaction mass from thin air, err, vacuum?

  39. Nerd fight!!!! by TapeCutter · · Score: 1

    I want to find the moron who wrote it and force him to actually read the paper that he gets almost completely wrong.

    The measure of a person's character is not found in the way they handle success. The guy who writes the SWAB blog is usually pretty good, been following him for years. If he has read the comments here, I'm pretty sure he's (re)reading the paper now.

    Disclaimer: I've never heard of this device but I'm stocking up on popcorn in anticipation of Ethan's follow up blog.

    --
    And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    1. Re:Nerd fight!!!! by ceoyoyo · · Score: 1

      I was surprised. He's usually pretty good. But this article is crap. Maybe someone hacked his blog.

      The results, as he described them OR as actually reported in the paper, are weak support for the EM/Cannae drive. You can't conclude that it actually works from those results because there were some compromises in the experiment, like not running everything in a vacuum. But you also can't conclude it doesn't work.

      This is a far better article.

  40. NASA Centennial Challenge by Anonymous Coward · · Score: 0

    It just occurred to me, if this effect is real--if this drive actually works, then it is worth billions of dollars, especially to NASA.

    It seems like a good use of the taxpayer's money to me to make this a centennial challenge with a nice juicy prize. NASA could publish a specification for this and give a prize to the first team to meet the specification, as tested by NASA. To cut down on wasting NASA's time and money, the claimants would first have to have their apparatus tested by an independent organization, to NASAs standards, at their own expense.

    I propose a prize in the form of $100 million cash and a license agreement to license the technology on a royalty basis.

    If it's real, we all win. If it's not, we don't lose anything but the relatively small costs of managing the contest.

  41. space drive by Anonymous Coward · · Score: 0

    All this reminds me of Harry Harrison's story, Toy Shop. There is also a story by Poul Anderson (I am sorry I cannot remember the title) where a NASA administrator funds a crackpot only because he needs to be seen doing something—success results, and the story ends with his seeing his Russian counterpart at a conference, and having the intuition that his opposite number made the same decision, for the same reason!

  42. Truth by DarthVain · · Score: 1

    Now you are talking about Truth. Truth has nothing to do with science, other than it is possibly the unattainable goal. If you want to talk about Truth go to Phil101 class.

    So yes, at a certain point in time the earth really was flat, as that was the currently accepted theory that most of the world believed in. It became un-flat if you will when others postulated a theory other than the generally accepted facts, did experimentation to prove it, and then convinced other scientists with their work that their theory had more merit and should be accepted as the new ideal. As you may recall, many were persecuted for their various beliefs mostly because if didn't fit with religious dogma. If you consider that the church was a even larger part of society and government at the time there are certainly analogs where things like Climate Change for example do not fit some political ideology and thus have a harder time gaining traction.

    Science is about trying to better describe the world around us using experiments that are repeatable using acceptable standards. Leave "Truth" out of it.

    1. Re:Truth by Immerman · · Score: 1

      Don't be silly - the Earth was always round(ish). That it was *accepted* as being flat is an illustration of your point that science is interested in successively more accurate approximations rather than truth, which it is generally accepted we'll be unable to recognize as such even if we eventually find it.

      The takeaway should be that we should recognize that the science we know is always probably wrong, it's just the most accurate explanation we've yet come up with. Not that the old explanations were correct until we came up with new ones.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
    2. Re:Truth by DarthVain · · Score: 1

      I think that is what I said. However you are applying hindsight to the idea, allowing for what we know is a "roundish" world... they did not know that back then. Only now can we look back and scoff, what idiots, of course it is round and not flat, we have satellites zooming around it and such taking Google map pictures and the like!

      To go into the whole Phil101 again, but rather than talk abouit Truth, talk about "Perspective". From their perspective, in time, and what science was telling them at the time, the world was flat, and thus it was so. Perspective is about what is observable, which is important from a science perspective, as without being able to observe results to confirm ideas, what you have is pretty speculative.

      We get that all the time in high physics, where mathematically something might be postulated, but it is of a scale we cannot yet observe to test results. There are plenty of pretty far out "theories" out there, particularly presented on slashdot, where some scientist speculates about black holes, or dark matter, or anti-matter, strings, or any of a number of exotic things which are particularly hard to either observe or test. This is why consortium spend billions of dollars to build things like Colliders, in the hope that it will allow us to actually observe and test things we could previously not perceive and thus not really advance science in any meaningful way.

      So I don't think it is all that silly at all, because the principle still affects us in the now, and likely forever will. It is easy to look back and ridicule and say well of course this is this way, that is for granted!

    3. Re:Truth by Immerman · · Score: 1

      Yes - we were definitely wrong then, we are probably wrong now, and the universe has carried on according to whatever it's actual, scientifically unknowable mechanisms have dictated. The lesson is not "the earth was flat for a while", it's "don't imagine scientific bedrock is permanent", the implications are very different.

      --
      --- Most topics have many sides worth arguing, allow me to take one opposite you.
  43. What it was not about [Re:The article is flat-o... by Geoffrey.landis · · Score: 1

    Oh for fuck's sake... Time to debunk this shit, again.
    TFA got it wrong as well, so I suppose I can't blame you people for getting it wrong too, but please try doing a little more research?
    A little background: The EmDrive was invented by a guy named Shawyer.

    I have have a copy of the paper in question, "Anomalous Thrust Production from an RF Test Device Measured on a Low-Thrust Torsion Pendulum," and have read it in detail. It does not reference Shawyer. This paper is not about the "EmDrive."

    It was tested by NASA, among others, and found to produce about 91 microNewtons. (I'll address the 30-50 that TFA talks about too.) That's way less than the Chinese found, but NASA was also testing it at much lower power and say they are planning to test a higher-power version.

    "Way less" means "over four orders of magnitude less." The Juan et al. test-- reference 1 in the paper-- did not test a thruster at hundreds of kilowatts input power! At best, you can say that the JSC test was testing something different form the Chinese test. They did not replicate the Chinese tests in any way.

    ...To test this, two versions of the Cannae Drive were (also, separately from the EmDrive test) tested by NASA: one with and one without the slots. Those tests both produced the same thrust (30-50 microN, about half what the EmDrive produced), which disproves Fetta's theory as to how the Cannae Drive is supposed to work.... and nothing else The null test device that everybody is so dismissedly claiming claiming disproves the EmDrive wasn't even supposed to be an EmDrive!

    The EmDrive was not mentioned or referenced in the paper being discussed.

    Fetta, inventor of the Cannae Drive, was disproven.

    Correct. This is a valid conclusion of the results of the paper.

    Shawyer, inventor of the EmDrive, was actually vindicated because according to his theory, the Cannae Drive (slots or no) is basically an inefficiently-shaped EmDrive.

    Shawyer was not mentioned nor referenced in the paper. The EmDrive was not mentioned nor referenced in the paper.

    I don't know why this is so hard for people to understand.

    It is hard for people to understand because in an article about the results of a paper "Anomalous Thrust Production from an RF Test Device Measured on a Low-Thrust Torsion Pendulum," you reference a garbage-dumpster full of other stuff that is not mentioned nor referenced in that paper.

    --
    http://www.geoffreylandis.com
  44. Opportunity cost by sjbe · · Score: 1

    This process will work out just as it should; I have no doubt that in a year there will be a dozen tests of this and we will likely know for sure one way or the other; in the meantime, I would take a $ 200 bet [xkcd.com] that the standard model will still prevail when this is over.

    The problem is the opportunity cost. Is disproving obviously crackpot ideas really the best use of money, brains and time? While sometimes seemingly crackpot ideas actually turn out to be not-crackpot but that is the exception that proves the rule. In this case it looks like snake oil, smells like snake oil and behaves like snake oil. Extraordinary claims, extraordinary proof, etc.

    1. Re:Opportunity cost by mbone · · Score: 1

      Well, if I had been asked to review a proposal to do this work, I almost certainly would have given it a poor review. If I had been on the NASA proposal review panel reviewing proposals and reviews (a task I have done in the past, and might do again in the future), and the proposal pile included this one, I almost certainly would have voted against it.

      However, that was (hypothetically) then. This is (actually) now. As an experimentalist, with two (the Chinese, and this NASA) sensible looking papers claiming "anomalous" results, it can't just be ignored and it has to be looked into. And, this is cheap science - it won't take a LHC to disprove it. I don't have a University Lab, but, if I did, and if it was suitable, I would be thinking of getting physics undergraduates to do this test next term - which would be a good teaching opportunity, even if the ideas turn out to be BS.

      Now, if you want to talk about the enormous opportunity cost from string theory, I would have a lot to say, but not in this thread.

  45. Its, Ethan, its by azav · · Score: 1

    "at it's core"

    Um, at its core.

    It's = it is

    Learn this.

    --
    - Zav - Imagine a Beowulf cluster of insensitive clods...
  46. repro by Anonymous Coward · · Score: 0

    Instead of writing articles let's setup test rigs and get a repro... omg people

  47. Bit of a spelling error in the article. by Minwee · · Score: 4, Funny

    The term that applies here is either "Bad Journalism" or "Bad Science Reporting". Calling it "Bad Science" and leaving it at that is giving the real charlatans a free pass.

    Scientist: "Hey, this is weird... We just put together something that shouldn't work but it sort of looks like it did."

    Headline: "NEW EXPERIMENT PROVES THAT EVERYTHING WE KNOW ABOUT PHYSICS IS WRONG!"

    Scientist: "It's not that... Look, here's a copy of a presentation we just gave to the rest of the department. There's a tiny and barely measurable bias in our results that we should be able to explain away but can't."

    Headline: "SCIENTIST WITH TWO ASSES HAS RESEARCHERS BAFFLED!"

    Scientist: "Um, that wasn't a press release, just a little paper we threw together to discuss our results. It's for other people familiar with what we're doing, and who know what words like 'bias' mean."

    Headline: "LEAKED INTERNAL DOCUMENTS REVEAL NEW LAWS OF PHYSICS!"

    Scientist: "I'm just going to back away slowly now and call some nice friends of mine who can show you out of the building. Try not to make any sudden moves..."

    Headline: "SCIENTISTS INVOLVED IN COVERUP OF REVOLUTIONARY NEW SPACE DRIVE!"

    Scientist: "Well, look at that. I just put a minus sign instead of a plus sign in one of the equations. If you do the math over again the results make a little bit more sense this way."

    Headline: "REVOLUTIONARY SPACE DRIVE SCIENTIST WITH TWO ASSES IS A FRAUD! HOW WERE WE ALL FOOLED?"

  48. Cold Fusion is real by Anonymous Coward · · Score: 0

    http://www.youtube.com/results?search_query=MIT+cold+fusion+2014

    It has always been real, and only High Energy physics and theory have said otherwise. DOE review 10 years ago said it was normal science.

    1. Re:Cold Fusion is real by Anonymous Coward · · Score: 0

      desktop cold fusion

  49. Easier to be a skeptic by WaffleMonster · · Score: 3, Insightful

    TFA itself has committed the sin of not reading the fucking article. They and their cohort of skeptics read only the summary from NASA without even bothering to get the full paper before drawing exceedingly obvious yet wrong conclusions.

    There is nothing wrong with dismissing something you assume is crap and don't want to waste your time with... as a practical matter there is only so much time we all have to make assumptions to operate. The problem arises when we forget or pretend we didn't make them.

    When you go that extra step of actively debunking you should no longer be able to hide behind your own ignorance and laziness. All those "skeptics" who think they know something simply because they elect to operate under the safety of default position need a good checking from time to time.

    Whatever ultimately happens at least NASA has the guts to go there and actually run experiments which is more than you'll ever get from the armchair skeptics.

  50. Previous Test, I was there. by Anonymous Coward · · Score: 0

    I was there when, back in January of 2011, the Cannae drive was tested at Niowave, Inc in Lansing, Michigan (http://accelconf.web.cern.ch/accelconf/pac2013/talks/weyb1_talk.pdf). I cannot / should not speak for everyone involved but lets just say the test results did not entice Niowave, Inc to invest in his project when the money ran out. Let's also imagine that the cost to continue testing it was relatively negligible. However, if you do a search for nothing comes up.

    Sorry I'm posting ac. If you think about it... it makes sense as to why. Ama would be dishonest, so, some questions welcome.

  51. THE VAZ by Anonymous Coward · · Score: 0

    Oh Well! Back to the ole VAZIMIR engine created by former astronaut Chang Diaz. Tests on the VAZ are scheduled on Space Station Freedom for 2014 :)

  52. Not bad science by jbee02 · · Score: 1

    You have a theory. You test it. You get results. thats good science regardless of the odds of getting favorable results

  53. The post is actually "bad science" by Anonymous Coward · · Score: 0

    Never trying an experiment because of ideological purity or arrogance is the ultimate "bad science". Sadly this isn't obvious despite being true. Actually trying the experiment even when everyone says it can't be so is always "good science".