After reading about the S-69 ABC concept in the intermeshing thread, I looked at a couple websites and they said that the abc was able to fly faster because the dual rotors offloaded the retreating blades. My assumption is this, i believe that the angle of attack would have to be reduced in order to prevent RBS and the flap that would result from that. How did they reduce the angle of attack on the retreating blade? was it through some sort of mixing unit or something else?
OR am i on the completely wrong train of thought here? I can't imagine not having to change the angle of attack on the retreating blade because doesnt RBS result in flapback of the blades? as well as a very large increase of drag? Ok i have said too much. I await your answers. thanks
