> "Ronald Metcalf" <poberfl...@hotmail.com> writes:
> The AS504x airfoil sections appear to be a big improvement
> over the RAF48.
> I am interested in the strange "tuck" underneath the trailing
> edge - the last few mm seem to droop down leaving a
> concave area right at the back (underneath).
FWIW, the old Maloof c/s propeller blades have a similar
"tuck" carved into the last 20% or so of the trailing edge of
their airfoil underside. I, too, am curious "why?"
Art Cacella 1970 American AA-1 N6155L "Dinkie"
1972 KR-1 Plans, still not started <sigh>
( but four metal homebuilts underway )
Winston-Salem, NC
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