Trike wing Billow what causes it
Posted: Sun May 19, 2019 6:59 pm
I am aware that banking the trike wing causes billow on one side.
One side of the wing fabric tightens and the other (upper?) loosens a bit. This changes the airofoil shape/camber generating more lift/drag on one side.
Or because of the anhedral the lower wing vertical component of lift is less (opposite of what happens on most fixed wings)
I am battling to see what moves in the trike structure to cause the billow.
The wing keel is securely bolted to the wing leading edge tubes so cannot turn relative to the wing.
The only free moving part is the hang block and spreader bar bolting flange inside the wing. This is padded on the aquilla and is free to move left and right over the wing keel. It gives that thunk noise when the wing is tilted left and right when you are on the ground.
Anybody have and ideas?
One side of the wing fabric tightens and the other (upper?) loosens a bit. This changes the airofoil shape/camber generating more lift/drag on one side.
Or because of the anhedral the lower wing vertical component of lift is less (opposite of what happens on most fixed wings)
I am battling to see what moves in the trike structure to cause the billow.
The wing keel is securely bolted to the wing leading edge tubes so cannot turn relative to the wing.
The only free moving part is the hang block and spreader bar bolting flange inside the wing. This is padded on the aquilla and is free to move left and right over the wing keel. It gives that thunk noise when the wing is tilted left and right when you are on the ground.
Anybody have and ideas?