Got a helicopter aerodynamics question which is bugging me. I think I have got the "Billy and Johhny" solution but I would like to check my reasoning. The aerodynamic question is this:
Why does the disc tilt forwards when I reduce the collective (and vice versa)?
I think it is because the NR momentarily drops leading to an relative increase in flapping up on the retreating side (ie disc tilts forward). Although I don't think it has an impact on this phenomenon, my aircraft is a turbine with US rotation and anticipators. Any ideas?
