Slashdot Mirror


The Pentagon's Supersonic, Shape-Shifting Assassin

grammar fascist writes "CNN reports that Northrop Grumman is under contract to build a new supersonic, shape-shifting bomber by 2020. The main innovation is in its single, rotating wing. From the article: '[It] will cruise with its 200-foot-long wing perpendicular to its engines like a normal airplane. But just before the craft breaks the sound barrier, its single wing will swivel around 60 degrees (hence the name) so that one end points forward and the other back. This oblique configuration redistributes the shock waves that pile up in front of a plane at Mach speeds and cause drag. When the Switchblade returns to subsonic speeds, the wing will rotate back to perpendicular.'"

21 of 489 comments (clear)

  1. Shape shifting? by MustardMan · · Score: 5, Insightful

    So, having one part of the plane change its angle is now shape shifting? WOW. My laptop is a shapeshifter, because the lid opens. My car must be a shape shifter too, the sunroof can take several positions!

    1. Re:Shape shifting? by Anonymous Coward · · Score: 5, Funny

      Try opening your laptop at Mach 2.

  2. Wizard Weapons by Anonymous Coward · · Score: 5, Funny

    Go America! Fuck Yeah!

  3. Re:Stability? by evanbd · · Score: 5, Informative

    The reason it's hard is that now all the control moments are linked -- you can't roll the plane without causing pitch and yaw changes too. So you need to control all the surfaces in unison. This makes it complicated and hard to fly, but not necessarilly unstable. That's why there's a computer flying it, not a person -- once they get a good model of how it behaves, applying all the corrections at once isn't a hard thing for a computer.

  4. 2020? What about 1951? by Baldrson · · Score: 5, Informative
    This was known in 1951:
    The first to prove that such a wing has minimum wave drag was R.T. Jones (1951). More recently, inviscid CFD calculations proved that the best performances are obtained with a wing of aspect-ratio 10:1 with a cruise CL=0.068. The best yaw angle would be 68 degrees, and the wing would have the flying operation shown in Fig. 1 below.
  5. NASA did a test plane decades ago by n76lima · · Score: 5, Informative

    I recall seeing a NASA test plane with a swiveling wing at the EAA OSHKOSH airshow back in the early 80's. It was one place, jet powered, and was flown in the airshow with the wing rotated to a fairly steep angle several times. It was a proof of concept to explore control issues and to prove that the wing need not be swept BACK on both sides to improve aerodynamics at high speeds. They referred to is as the AD-1", an oblique wing aircraft.

    --
    We don't need no stinkin' sig!

    1. Re:NASA did a test plane decades ago by Geoduck_87 · · Score: 5, Interesting
      The control issues were also the subject of a well-regarded Ph.D. Thesis at Stanford in the early 1990's. The original NASA aircraft had the axis of wing rotation vertical in level, forward flight. The pivot joint was at the wingspan centerline.

      The conclusions of the Ph.D. thesis was that one gets a much more controllable AD-1 if one modifies the wing / fuselage configuration as follows:

      1. Tilt the pivot axis a few degrees away from the side of the aircraft that has the forward sweep of the wing.

      2. The wing needs to be mounted a few percent off its centerline (that's right, an asymmetric configuration).

      3. A couple other conclusions that I can not recall (anhedral / dihedral; spanwise changing airfoil; etc)?.

      Note: This was an analysis of the AD-1. The fuselage / wing interactions drove quite a bit of the specific stability / control based modifications. If one has a different fuselage (for example, the illustration in the CNN article), the specifics will change.

  6. NASA page on the AD-1 by TopSpin · · Score: 5, Informative

    Here is a link to the NASA page on the AD-1

    --
    Lurking at the bottom of the gravity well, getting old
  7. Britain isn't a major European economy? by torstenvl · · Score: 5, Insightful

    Britain - 5.1% Portugal - 4.3% Denmark - 4.2% Ireland - 4.2% Austria - 3.9% Luxembourg - 2.6 Netherlands - 2.4

    How about adding an option to post as an ignorant math-challenged fascist instead? 4.6 is nowhere near half of 5.1.

    As a side note, France and Germany have higher reported unemployment because they don't count part-time minimum wage jobs. HTFH.

    1. Re:Britain isn't a major European economy? by MustardMan · · Score: 5, Funny

      You really need more than a knee-jerk intellect to be using political terminology, so you don't end up just diluting the definitions.

      Shut up, commie!

    2. Re:Britain isn't a major European economy? by vertinox · · Score: 5, Insightful

      And where do you get "fascist" from? Do you even know what that word means?

      To be fair, fascist just mean some one who believes in a strong powerful government over everything else. We just made it a dirty word after WWII because Itality referred themselves as such.

      Of course National Socialism isn't a bad economic policy for a government to have either, but no one would dare use the phrase when talking about modern day governments.

      But still it derides the point that our economy is most likley doing really good right now because of massive military and government spending... Actually kind of like National Socialist Germany in the 1930's. However, such an economy is not sustainable in the long term.

      Germany invaded other countries and looted them and used slave labor to make up for this problem, wheras our war economy just throws it into the big pile of national debt and sell it off to China, Japan, and other places.

      If tomorrow Japan and China decide to either A.) Stop buying debt or B.) Demand their debts back ASAP we'd be hosed.

      Of course they'd be hosed too when the world market economy collapses so for right now they keep buying and profiting on our massive spending.

      --
      "I am the king of the Romans, and am superior to rules of grammar!"
      -Sigismund, Holy Roman Emperor (1368-1437)
  8. Maybe not a waste by Screwy1138 · · Score: 5, Insightful

    While projects like this can easily be seen as waste, they do a couple things.
    This money goes to create hi tech jobs, rewarding people for getting engineering/science/sometimes computing degrees, potentially supporting universities themselves.
    These projects generate knowledge by testing out technologies and supporting businesses or universities that sponsor research.

    In my opinion, this is not waste, even if the end product never comes to be.

    Certainly, this can only go so far, you wouldn't want all your money going to high tech / low success projects, but it is reasonable to have money going towards these things.

  9. Re:Isn't "Assassin" in the title inflammatory? by Winterblink · · Score: 5, Funny

    What's so inflammatory about it? I mean what do you think this thing's supposed to do, fly in at supersonic speeds to deliver a payload of Snickers bars to satisfy the hunger of the enemy?

    --
    "I'm a leaf on the wind. Watch how I soar."
    -Hoban Washburn
  10. Re:Swing Wing Designs by ceejayoz · · Score: 5, Informative

    With the upgrades done over the years, it still the the best carrier fighter we have.

    With the upgrades done over the years, it still the the best carrier fighter we don't have.

    Fixed that for ya. They've been decomissioned since March.

    It has range, computer power, ability to lock onto six different targets at the same time and shoot them all down, and doesn't need to be pointed at the bogeys after the missles are fired. The F-18 Hornet is a short range fighter, and has to keep itself pointed in the general direction of the bogeys until the missles hit.

    Incorrect, to my knowledge. Fire-and-forget is based on the weaponry, not the platform firing it. Just about every air-to-air weapon - the only exception being the AIM-7 Sparrow, which is being phased out for the AMRAAM - the F/A-18 launches is fire-and-forget and doesn't require external guidance from the launching aircraft. It can carry more payload, too, if Wikipedia is to be believed.

  11. Re:Swing Wing Designs by HotBlackDessiato · · Score: 5, Funny
    I thought the consensus was that moving wings were a Bad Idea?
    As long as they remain attached somehow.
    --
    "If you don't have eyes you shouldn't have wings" -- Carl Pilkington
  12. Re:Budget Priortites by Reaperducer · · Score: 5, Insightful

    The thing that the military adds to R&D that academia lacks is urgency. The military responds to a threat, or a perceived threat. Academia can spend generations arguing the same theories to death.

    --
    -- I'm old enough to have lived through six different meanings of the word "hacker."
  13. Re:Correction: stale data. by torstenvl · · Score: 5, Interesting

    Except that it's false to say "Americans can afford to drive SUVs." What you really mean -- unless you intend to deceive people -- is that SOME Americans can afford to drive SUVs. Many others (thirty-eight million Americans) have "insufficient income to provide the food, shelter and clothing needed to preserve health" (Figures from the Census Bureau, definition quoted from the Orshansky Thresholds used thereby).

    I think there are fewer than thirty-eight million SUV drivers in the United States. If I'm right, then from a purely quantitative perspective, the Swedes have a better standard of living than a purely capitalist United States would have.

  14. Re:Budget Priortites by Monster_Juice · · Score: 5, Insightful

    WOuldn't it be more efficient to take the war out of it and spend the money on pure R&D?

    R&D is Research & DEVELOPMENT. You have to build something when you are done otherwise it is not R&D, it is just R. It is also not R&D&War.

    Better yet why not just provide incentives for private enterprise to do R&D and give the money back to the taxpayers?

    Well other than the giving money back part, the US government does this all the time.

    How about R&D through the space program?

    Have you ever heard of NASA?

    Wouln't that be better then making new bombers to drop bombs on miami on a band of al-quada sypathisers?

    Please use facts when making an argument. This is just a dumb statement that shows you have no good points to argue.

    --
    Slashdot +1 funny -4 Insightful +1 informative -2 Redundant
    Karma: Somewhere between SCO and Microsoft
  15. Re:What a great idea by poofyhairguy82 · · Score: 5, Interesting
    some of us regular people think we could reduce spending to a mere $100 billion, spend the other $400 billion on health, education, infrastructure, etc., and still have more than enough power to defend our country from anyone else in the world. We outspend the next 20 countries combined---we don't need to spend that much.

    Then regular people like yourself need to open their eyes.

    We could spend much less than we do now and defend our nation from any "real" threat- that is true- but most of our military spending is not to defend us from threats. The U.S. spends so much on the armed forces for the same reason that at one point the U.S.S.R had enough nukes to destroy the entire planet a few times over- we want to make the idea of (a major nation) going against us in any significant way (as in more than "we don't support what you are doing") a horrifying thought. We want to have so much power that the rest of the world is FORCED to follow our lead or pay the price for getting in front.

    China and India have over a billion people each. The economic force of such numbers mean that realistically THEY should be the superpowers, not us. But they (in my lifetime) will not dare challenge the authority of the U.S. because they know that we have a millitary that can take them back to the stone ages if they cross us. Because of our military, we get access to cheaper and more resources than they do (Iraq oil anyone?) Because of our military, we will stay on top of the world long after when we should no longer be.

    There is also that whole "military spending leads to domestic jobs" thing as well.

  16. At what time where you in Sweden? by Iloinen+Lohikrme · · Score: 5, Insightful

    As a Finn I was just wondering, at what time where you in sweden?

    Because when Wartburg was a popular car in Finland, it would date to 1950s, that would make you a really old slashdotter. Mayby you are mixing Wartburg with Lada? Lada was a soviet made car which was also imported to Finland, but it was never popular, and if you mixed those two, then it would date you to 1980s.

    Thought, you are quite right about the fact that having and driving a car in both Sweden and Finland is very expensive, but that's because the car taxes double the cars price and gasolines price, which btw. is just right, because personal driving is expensive to goverment (roads) and to enviroment (polution) and thus taxes should be taken to compensate those costs. Now days there thought is talk about moving to strictly taxing gasoline, and not cars, that would be logical, and it would make people think more about having a own car when a liter would cost from 2 to 3. The reason why americans are driving SUVs is because US goverment is subsidizing personal driving, by not taxing car owners the cost that are associated with using cars.

    On a note, I too think that scandinavian countries tax too much, and there is too much goverment control, our unemployment rate is too high, and the official numbers are cleaned by putting people in to education and to early pension. Thought, I think that american system isn't the answer, thought it has some good points, the society should take care of it's weaks and unfortunates, and provide a minimum level of living, that is the only way in which we can say that everybody is in the same line in life and that people try and take risk in their lifes, without worrying ending up in the street.

    PS. The most popular car in Finland in now days is Toyota, same too in america, or it will be soon ;-)

  17. Re:Budget Priortites by Jeremi · · Score: 5, Insightful
    The current group of fanatics we are fighting feels anyone who is not a member of their culture/religion is not worthy to live and must be killed. They would be trying to destroy us even if we stood in the corner with our hands in our pockets, and they are doing this even to people who sympathize with them.


    Your statement is correct as far as it goes, but what you've failed to realize is that "the current group of fanatics" is not a fixed set of people. Like the particles of water vapor that form a cloud, there are constantly individuals entering and leaving the "set of fanatics", and its appearance as a fixed object is an illusion. Like a cloud, its size will grow or shrink depending on the environment around it. Which is why so much of the USA's recent actions have been not only ineffective but counterproductive: if a military operation kills N terrorists, but inspires (more than N) people who were previously non-combatants to become terrorists, then our effort in that operation has actually harmed us more than doing nothing would have.


    The "War On Terror" is not some video game where you can win simply by killing until there are no 'baddies' to kill. It is a political struggle for the hearts and minds of humanity. The terrorists know this, and use it to their advantage. It's time we did the same. When the bulk of the world can't tell the "good guys" from the "bad guys" anymore, the terrorists are winning.

    --


    I don't care if it's 90,000 hectares. That lake was not my doing.