"Peter Gottlieb" wrote in message
. net...

"Jay" wrote in message
om...
For the people that didn't visit the Zenith link, thats a sheet metal
hinge, no moving parts, just flexing sheet. I've seen this up close
and its pretty slick. One of those "Why didn't I think of that!" kind
of moments.


I'm concerned about corrosion on such a flexing member and how the
imperfections introduced could concentrate stresses during flexing and
cause
premature failure.

Corrosion protection is critical on any metal airplane part. If you read
the dissertation on the web page, Chris Heintz goes into a lot of detail on
how they tested it for fatigue and they even damaged it intentionally and
tested it.

Rick