German Scientists Confirm NASA's Controversial EM Drive

MarkWhittington writes: Hacked Magazine reported that a group of German scientists believe that they have confirmed that the EM Drive, the propulsion device that uses microwaves rather than rocket fuel, provides thrust. The experimental results are being presented at the American Institute for Aeronautics and Astronautics' Propulsion and Energy Forum in Orlando by Martin Tajmar, a professor and chair for Space Systems at the Dresden University of Technology. Tajmar has an interest in exotic propulsion methods, including one concept using "negative matter."

Comments

Re: Looking more and more likely all the time...

[alvinrod]

Skepticism is healthy, and when something sounds too good to be true, it usually is. However, this is being repeatedly validated by multiple credible sources, which means that it should be accepted. If the crowd here is skeptical, it's only because we've see so much junk science over the years that has been latched onto and all the damage such things do. Look at the anti-vaccination movement, which has resulted in an increase in cases of diseases that were practically non-existent for decades.

Everything that's generally accepted today went through similar amounts of skepticism at some point and was borne out by repeated studies to prove its validity. Anything less and you've got something more akin to a religion and articles of faith.

Physics time!

[cbhacking]

It appears to impart momentum to something without an opposite momentum imparted to anything else... you know, the basic concept of how every other propulsion system in the world works?

When you walk, your feet push against the ground, imparting a (tiny, relative to the mass of the Earth) amount of momentum to it at the same time that your feet impart momentum to your body.
When you sail a boat, the sails alter the momentum of the wind, and an opposite alteration is imparted to the momentum of the boat.
When a rocket engine fires, it releases exhaust with a lot of momentum going one way, and the rocket receives the momentum going the other way.
This model holds for any kind of propelling of anything. Even a flashlight projecting photons imparts a tiny, tiny bit of momentum to your hand, to your body, to the earth. Magnetic propulsion, chemical propulsion, ion propulsion... all of them operate on the principle of "we go this way, by making something else go that way".

The EM Drive appears to go one way without making anything else go the other way. It releases no exhaust, pushes against no solid or fluid, emits no photons, and interacts with no external magnetic fields. We don't know how it works (there are a number of theories, none of which are that widely accepted), and we still aren't 100% sure it does work (maybe it's still all experimental error... that becomes less likely with each independent verification, but extraordinary claims call for extraordinary evidence), but if it does work it does so in a way that is outside our current understanding of physics. That is a Really Big Deal.

One way or another, this is exciting!