Aerodynamics of Rogallo wings
I'm just converting onto a weightshift microlight so have been trying to understand the basic aerodynamics.
I understand that Pitch stability comes from washout and reflex, and that reflex causes a rearward CP movement with AoA - but please can someone explain why reflex causes the CP to move rearwards?
Some of the articles talk about pendulum stability but I can't see how this is possible when the trike is able to freely pivot beneath the wing (presumably at the Aerodynamic Centre?). I could accept something based on centripetal force causing sideslip which leads to roll-in because of the sweep, but haven't seen this discussed anywhere. What's actually going-on?
I can see that billow-shift is a good thing, and that it can be improved with a floating cross-tube, but how do I explain the sequence of events when entering a turn with a wing having both of these "features"?
HFD