What effect on a bi-plane would the wing incidense be if say both wings (upper and lower) are set the same . I know that it is desirable to have the upper wing stall first so it should have a bit of negative in it. But if both wings were set the same what effect would it tend to have on the flight of the plane??? Lets say both have 1.5 to 2 degrees of positive.

Thanks for any thoughts .