I threw this together, it includes some assumptions, but I think it's pretty close to reality. I strongly suspect what part of the FEMA process is that? that the Egg fuel bleed system actually drops the outlet pressure enough that the pump is able to move the small bubble of air at the pump inlet. If you have a well designed system, what exactly would that look like (or NOT look like) that air is displaced automatically and there is no value to the bleed system. I tested my plane and it definitely self primes.  How exactly did you do that?  Which failure modes and what possible situations did you test for? The Egg crash plane would not pump fuel hours after the vapor lock.  Why exactly?  Are we sure they actually got to the bottom of it all? It was not a self priming fuel design.

Back to lurking, this my quota of posts for week. ;-)

-al wick

Jim;  Lighten up.  I don’t see why Al W. should be held to a higher standard of specificity than you, or anyone else.

Al G.