wrote in news:1169135944.927468.166880
@m58g2000cwm.googlegroups.com:



1/4" ply will bend more easily if you orient the grain
across
the bend instead of along it. The grain should be parallel to the
spars.
If it's 1/4" birch ply, that would seem a lot of overkill
for a wingwalk. If it's 1/4" pine or fir, it should bend without any
problem.


Well, I was planning to use birch in fact. hadn't thought about using
anything else but now you have me thinking. My real concern about
bending the stuff in the first place was, in fact, the stiffness of the
Birch ply. I imagined it never reall settling down. The 1/4 birch I have
is 12 ply and is like iron!

My son and I finished a small boat last year, using 1/4"
Chilean Pine plywood, and we put some impressive curves in it. See
this
picture of an identical boat:

http://www.glen-l.com/designs/outboard/dsn-sqtd.html


Thanks!