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[YF] In a new round of testing, NASA confirms yet again that the 'impossible' EMdrive thruster works - Page 2

post #11 of 47
Quote:
Originally Posted by Just a nickname View Post

If you emit EM radiation, same principle apply BUT if the EM radiation is enclosed, it will "collide" with the other side thus resulting in a net zero momentum gain for the device.

The theory, as far as I understand it, is that relativistic effects mean that the there is a net difference in the momentum in the driven direction vs the return direction for the EM waves. Makes little sense to me, but apparently it works.

Quote:
Originally Posted by Just a nickname View Post

Even if it was working, the only advantage over nuclear propulsion is that you save some weight (radioactive material + whole system) but I doubt it offers any propulsion advantage beside that.
So no, it wouldn't help NASA go to mars with it.

The one major advantage is that it doesn't have the word "nuclear" in the title. Seriously.

Also the fact that it is essentially fuel less means that it could be useful for going further than Mars. With it we could actually put a probe in orbit around Pluto within someone's lifetime, or go investigate all the Jovian moons with a single probe. Or we could send something out to the limits of our system and then bring it back. Or even just shuttle back and forth to the moon, or build a device to collect and potentially de-orbit space debris. There are lots of possibilities.
Quote:
Originally Posted by Just a nickname View Post

Also, the question isn't if it works but WHY it works. You can emit light and be propelled but the light isn't enclosed otherwise it wouldn't work. This thing is "working" on its own which is IMPOSSIBLE.
Remember the faster than light neutrino. NOPE.

And that is why they are testing it rather thoroughly, trying to eliminate all the possible other causes of the thrust readings. The faster than light neutrino was dismissed during peer review of the data, which is the point of a peer review. The Eagle Lab is producing a paper for peer review now, so the scientific community will get a chance to weigh in on it soon.
Quote:
Originally Posted by Just a nickname View Post

Physic law are universals, the only so called interest the NASA has is how it works. Media make it sounds like we just broke the law of physic hermygawd clickbait.

Physical laws may be universal, but our understanding of them isn't. Heck, we don't even understand gravity yet - it's still a theory.
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post #12 of 47
More info:
http://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/
Quote:
Dr. White’s computer analysis also shows that increasing the input power focuses the virtual particle flow from near omnidirectional at the low powers used in the NASA experiments, to a much more focused jet like beam at the higher power (kilowatts as compared to less than 100 Watts) used in the UK and China experiments.

The simulation for the 100 Watts input power (as used in the latest tests at NASA) predicted only ~50 microNewtons (in agreement with the experiments) using the HDPE dielectric insert, while the 10 kiloWatts simulation (without a dielectric) predicted a thrust level of ~6.0 Newtons. At 100 kiloWatts the prediction is ~1300 Newton thrust.

The computer code also shows that the efficiency, as measured by the thrust to input power ratio, decreases at input powers exceeding 50 kiloWatts.

A note of caution is that Dr. White’s simulations do not assume that the Quantum Vacuum is indestructible and immutable. The mainstream physics community assumes the Quantum Vacuum is indestructible and immutable because of the experimental observation that a fundamental particle like an electron (or a positron) has the same properties (e.g. mass, charge or spin), regardless of when or where the particle was created, whether now or in the early universe, through astrophysical processes or in a laboratory.

Another reason is that the Quantum Vacuum is assumed to be the lowest possible (time-averaged) energy that a quantum physical system may have, and therefore it should not be possible to extract momentum or energy from the Quantum Vacuum.

If true, sounds like scientists are on the verge of a major breakthrough in understanding dark energy and the fabric of space-time itself. Baby steps to a warp drive!
post #13 of 47
Quote:
Originally Posted by DNMock View Post


If true, sounds like scientists are on the verge of a major breakthrough in understanding dark energy and the fabric of space-time itself. Baby steps to a warp drive!

haha oh yeah rolleyes.gif
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post #14 of 47
Since the force is really tiny and the device probably has a different thermal profile on one side versus the other, perhaps the measured force is just the difference in radiation pressure emitted by both sides?
post #15 of 47
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post #16 of 47
Quote:
Originally Posted by DNMock View Post

More info:
http://www.nasaspaceflight.com/2015/04/evaluating-nasas-futuristic-em-drive/
If true, sounds like scientists are on the verge of a major breakthrough in understanding dark energy and the fabric of space-time itself. Baby steps to a warp drive!

Just to add to this, that article is quite old now, but if you head to their forums some of the people taking part in the various experiments are posting -

https://forum.nasaspaceflight.com/index.php?topic=38577.0
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post #17 of 47
Quote:
Originally Posted by Particle View Post

Since the force is really tiny and the device probably has a different thermal profile on one side versus the other, perhaps the measured force is just the difference in radiation pressure emitted by both sides?
It is my impression from multiple articles I've seen on the subject that this second phase test eliminated thermal variables as a cause.
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post #18 of 47
Quote:
Originally Posted by Syan48306 View Post

Hell. Just test it in space and see if it propels a ship. If it does, don't bother explaining it. Just ride it to mars.

uhh, not finding out the cause means not being able to improve upon it.
post #19 of 47
I'm just waiting for them to bolt one of these (capable of running up to 30kW output), a pair of ISS-class main solar arrays, and a cheap set of instruments to a spacecraft chassis then throw the result into a high orbit for testing and see what happens.
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post #20 of 47
Quote:
Originally Posted by Syan48306 View Post

Hell. Just test it in space and see if it propels a ship. If it does, don't bother explaining it. Just ride it to mars.

That sounds like the best plan I have heard so far.
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Overclock.net › Forums › Industry News › Technology and Science News › [YF] In a new round of testing, NASA confirms yet again that the 'impossible' EMdrive thruster works