ORIGINAL: jimmyjames213
could this also be caused by the fact that the rudder usually isnt centered? it is usually larger in the canopy side so the plane can rotate on takeoff. this would cause a small pitch to the belly in knife edge position. this may not be tha main reason but it could be a factor.
the CFD Simulations I have done so far seem to reveal it is predominantly a Stab height positioning phenomona....
I do want to run some follow on simulations to investigate the influence of the asymetrical vertical....