billyshaw22
Active member
The main thing that i found when getting any biplane to fly straight in all orientations is to have the bottom wing 0 deg, or parallel with thrust line, no dihedral and the top wing ether 0 deg or slight negative (leading edge slightly down) and no dihedral. If you are flying at higher speeds a slight negative incidence in the top wing is good, but make sure there isn't positive in the top wing, it can cause extra stress and try and pull it off. Another factor is if you put dihedral in the wing or wings. The dihedral will tend to make the plane climb to the canopy in knife edges. this could actually cause a snap roll when you apply rudder without giving the right amount of down elevator at the same time