On Jul 27, 6:21*pm, Bob Kuykendall wrote:
Last weekend I got a bit more information about the "Llewellen
Modification" mentioned below. It is said to be a steel reinforcing
strap applied to the outside of the wing along the wing main spar for
2/3 semispan or so. If that is true, it's great from a structural
perspective. From the aerodynamic perspective, maybe not so much...

Thanks, Bob K.

I knew someone who flew in such a modified L-13 in OZ. 9600 hours on
the airframe at the time IIRC. Commented that it didn't appear to
affect performance.

Whether someone will attempt a US AMC based on this mod remains to be
seen.

Frank Whiteley