> Anyone got any info or pointers to references on wing trailing edge
> thickness and profile?
>
> Miles
Well, Dr. S. Hoerner says keep 'em under .4% of wing chord. That's
about 1/8", which seems the way they come out w/o worrying about it.
Square corners are theoretically draggier, but at that dimension it
should be insignificant, and they won't paint well anyway.
Someone can correct me if I'm wrong, but sharp edges on ailerons are
supposed to be desirable for competition aerobatics, as it gives them
a small dead zone (hence also the Flettner strips on the trim tabs).
But that could drive a Navaid autopilot nuts and would be more damage
prone. Effect of "sharpness" on the flaps should be insignificant, I
would think.
Regards,
Fred F., A063
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