delta drag
while our fastest club planes here run 8x9's, i hear that the Plyon guys dont go over 7" in pitch, you get more from RPM than pitch after that. fine if your engine will rev higher than the 18000 max most fast sport engines have.
one reason the big scale planes go faster, there bigger, real planes go even faster than that. most small planes will do 120 without thinking, and they are hardly aerodynamic.
thats just the way physics works. if you wanna get real space age, i also saw ages ago a nose cone with a small rod with a blunt face, i think the idea was to create a shockwave the rest of the plane would fly in, like driving & following a big lorry, it would have less drag. not sure if this worked, another was some sort of plasma fire on the point that did the same thing.
i think those racers are the way to go, what other type of pilot would de-tune a plane from 200+ to 190mph just to make it better in the turns!!!!