I have a SPAD that has bad aileron flutter, I can see it and hear it only on one wing.
When it happens the wing drops RH .
At a level flight its OK only when banking using rudder or ailerons or speed if thats what you call it.
It done it again on finals for landing but droped the wing had no height left and hit the deck....

there is no free play in controlls and only one wing......

Any ideas thanks..