Will the EM Engine survive peer review, or be debunked like cold fusion?

Without having read the whitepaper or their actual research it is hard to say. This really hits home the importance of peer review in scientific research however. This might sound like a cop-out answer, but in every situation similar to this, either a mistake is pointed out, or physical law is redefined. It will be very interesting to see which. What should be obvious is that SOMETHING is going on.

It reminds me of the famed anti-gravity device favored by conspiracy theorists, developed by Thomas Brown. The killing blow there was that the physical effects did not exist in a vacuum, and thus lead to the discovery of previously unknown or at least not well understood effects of electrohydrodynamics.

My scientific gut tells me, that something similar will be found here. The important question will inevitably be, however, is if whatever is the cause - is it scalable. If it is not scalable, then it is just a scientific curiosity, and not actually usable as a source of propulsion. Either way, I look forward to finding out.

From what little engineering information is provided in the article, I'm going with "it will be debunked". While microwaves have momentum without mass, this doesn't help overcome the conservation of momentum law. The thrust provided at this point is so tiny, it might be the unseen result of an open system that appears to be a closed system. Very small amounts of EM energy or even ions or electrons emitted from the backside (outside flat portion) of the closed cone would make it an open system. Until the concept is scaled up to move thrust beyond the "error bars" in the test equipment, I remain skeptical.

And if had of course read of the em engine you'd mentioned here as well...