(Veeduber) wrote in message ...
to All:

I've never heard of anyone using steel strapping for hinges, nor
sewing them to
the spar.

Bravo, Bob!

I'd appreciate a sketch or two, and would be happy to post them on my
website if you're no longer enamored of Yahoo Groups. The gussets,
and the actual shape of the hinges I'm having a little hard time
following. I THINK I know what you're up to, but I've been wrong
before....unlike most of our fellow inmates on RAH.

How about pin-less hinges? Sew the strapping to the spars,
criss-crossing it on the hinge line, like we used to do for fabric
hinges on control line airplanes? Your flapper should reveal if it
will fatique before any conceivable service life would be up.