Chinese building Anti Gravity Drive (Emdrive)

Inquisitor said:
Basically, what he's saying is that the tapered walls of the waveguide cause the microwave photons to be approaching at a smaller angle from the normal when hitting the large end-wall than the smaller end-wall. The result of this is that they impart more impulse on the larger end of the cone than the small end.

This much is correct, but his bluff is that he's ignored the impulse in the direction of the smaller end that the photon imparts on the waveguide when it hits the tapered side-walls. It turns out that if you take this into account, the impulses all cancel each other out nicely, and the device goes nowhere (not that this is particularly surprising, given that we've fully understood Newtonian mechanics for quite a long time now).

So, essentially, he's cleverly concealed some aspects of the system's dynamics in order to get the answer he wants out of his calculations, and is relying on people's ignorance for his credibility. Unfortunately for him, someone with a PhD in relativistic electrodynamics (which is very relevant to this) came along and blew his arguments out of the water :)
Click to expand...

Have you thought that there might be some unexplained force in action that we can't measure that allows it to do what it claims?
 
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