Flypaper 2,
Not to be rude, but my experience in full-scale planes(I'm a private pilot) shows that engaging flaps will increase lift and drag. This will cause the nose rise (assuming the same throttle position) - not fall. Other RC pilots that I've talked to agree that this is the case (as I observed others stating that the nose falls during flap deployment and I as these people why this would be the case) . . . My JR 378 Heli is my first computer radio, and they have a means to mix in elevator trim (down) with the deployment of flaps/flaperons . . . I'm sure that most, if not all other recent computer radios have this ability. The only scenario that I can think of that would cause the nose to fall would be if the power was reduced during flap deployment . . . I'm also assuming a standard wing/stab setup . . not canard, delta or whatever . . . I'm not familiar with their flight characterstics.

Regards,
Mark F. Sanderson