Paul,

Most people don't know this, but Cessna built a helicopter in the late
fifties.  It had an extremely clever rotor head and a configuration that
is a natural for an automotive-derived engine.  A turbocharged 20B would
be a great engine for this machine.  Check out this website:
http://www.commercemarketplace.com/home/CollectAir/cessna.html

This is a large website with a lot of good helicopter history and
info.  There are also some very good drawings in it.

Steve Brazil


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