Yes, John, its actually quite simple to prove my theory. Hold a piece of paper betwween the finger and thumb of each hand at each of the paper end so that the paper "dangles". Now blow over the curved top of the paper (rather like the enhanced airflow created by the jet efflux) and you wil see it rise as the pressure above the paper falls, its a good demo of Bernoulli's theorem, basic aerodynamics, and this, I would suggest, is what causes the pitch up of the Kingcat, such that a huge engine angle is required to control it without elevator input !

Of course it's only theory and the only proof is to run a computer simulation or put the thing in a wind tunnel. More learned people, aerodynamicists, than I may care to comment.

My Bobcats don't have such a large angle and do pitch up, somewhat, on increase of power.

Regards,

David Gladwin.