[AR] Re: NASA test of quantum vacuum plasma thruster (was "Anyone heard of this?")
- From: qbert@xxxxxxxxxxxxxxx
- To: arocket@xxxxxxxxxxxxx
- Date: Mon, 04 Aug 2014 13:29:33 -0600
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20140006052.pdf
Don't tell us most of us agree with you, you need to tell
them...There is of course the problem as to defining what actually is
causing the motion...
Robert
At 06:09 PM 8/2/2014, you wrote:
There's essentially no chance that a thruster can work where you
turn it on, feeding only electricity through it, and with nothing
leaving it; where you switch it off, and you're now moving faster.
This is what the emdrive is claimed to do.
If you could do that, we're in perpetual motion territory; because
it violates both conservation of momentum, and (more subtly) it can
be shown to violate conservation of energy.
The emdrive paper tried to fix that by using the kinetic energy
equation in one frame of reference, but you can show that energy is
violated in every other frame of reference except the one he did the
calculation in. So he's done something wrong. You can fix it, if you
introduce an efficiency variable, and set the variable to zero.
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