- Nov 14, 2009
- Rocky Mountains
Somewhere long ago I read a report on sharp trailing edge vs rounded. Since then I've always tried to get a nice sharp/squared off trailing edge. Reason being kind of an unpredictable reverse Gurney flap effect for the rounded trailing edge. IIRC the paper didn't note much difference in drag, just a small change in lift coefficient.Lots of composite planes fly around with conveniently blunt TEs, even planes where a lot of attention has been paid to drag reduction. As a practical matter, I don't think you'd see a difference in performance.
I think a nice sharp/square edge is easier to build to look straight....especially on moldless composite.