Originally posted by aircat
Hey to all, when I do loops my plane does cork screw looking thing. The plane is similar to an ugly stick but has a clark-y air foil. At first I thought the wing or tail was warped or flexing but I don’t see any sign of problem , other than that it flies very well .
Any suggestions would be appreciated.
Thanks
Aircat
waow, I see you get a lot of answers, but.....Not the obvious one !
Assuming that everything else is correct, plane straight, center of gravity ok (Should have nothing to do with the cork screw thing..), ailerons properly set to neutral, there is 2 things to check:
(1)-Be absolutly CERTAIN that your elevator 2 halfes are aligned, and move with the exact same throw.
(2)- At the top of the loop, when you don't have much speed, you get the maximum K-factor, that is the torque of the engine apply a strong yaw effect, which only the PILOT can correct.....So, check the pilot... ;-)
Bernard