Originally posted by ddekel
Hi
I read many explanations about this stuff.
The more common one talkes about the side-slip
which causes the A/P to roll back
But when we fly 2 channel glider with wing dihedral
in order to turn we create yaw (side-slip)
by the rudder --->> dihedral translate it to bank (roll)
into the turn !!!
So how roll-back moment is created by the dihedral when having
gusts?
If I understand properly what "roll-back" means ( English is not my first langage), here is how dihedral works: In straight and level flight, both wings have the same projected surface, which is smaller than the actual surface. Under gust, the lower wing being closer from "flat" has a greater projected surface, hence generate more lift, so the lower wing goes up....That's simply how it works, and why dihedral give roll stability.
In a turn on a 2 channel, you increase the external wing speed, thus increasing the lift. As soon as you let go on the rudder, the plane retrieve straight and level attitude by itself for the same reason.
Bernard.