Andy Durbin wrote:


According to Thomas, Fundamentals of Sailplane Design, the wing twist
of the ASW-20 is 2.5 deg (page 210). Isn't twist designed into a wing
to prevent the tip stalling before the root?

It is also used to adjust the lift distribution for decreased drag, and
since the airfoil also changes from root to tip, it might be hard to
determine (just from the numbers) why the designer chose to put twist
into the wing.



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Eric Greenwell
Washington State
USA