"f the axial length is equal to the diameter of the small end.." "..thrust should be reversed. "
So it's only a lucky guess that the original design produced any thrust at all in a measurable direction?
This is pretty exciting news as a viable explanation is the first step to moving beyond cut-and-try designs.
However with something this big we need to be very cautious as extraordinary (and they are) claims need extraordinary evidence.
The payoff for a system that turns electricity directly into thrust with no mass loss for everything in LEO and beyond is of course huge.
Biting the hand that feeds IT
