>Positioning Flaps
>. I have my flaps positioned so that the bottom of the flaps
>are flat with the bottom of the wing. I noticed at Oshkosh that others
>have the
>flaps positioned so that that they align with the top surface of the wing &
>level with the ailerons. What affect will this have on performance? Which is
>better?
>Chuck Rhoads
Chuck
The flap top surface should be slightly concave, ie flaps up a tiny bit.
Have a look at the TE of a decent glider. Don Dykins original airfoil
section does show this but it isn't clear in the plans. You will have
better cruise performance with a little bit of reflex on the TE
Graham
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