Paul,

There are two JPEG pictures on this website that show a very nice bed mount
that I am considering copying.  What do you think?


http://www.express-builder.com/forum/messages/3/16.html?1143666106



Doug Fir

The CG of the Cont. engine is back about half way unlike our engines.
There is no 14 inch long PSRU mounted on the front of the engine like our
typical installation. That moves our eng. CG forward under the front rubber
bushings so they must take all the load. The rear go along for the ride.

As a correct space frame the design is seriously flawed. We have been saying this
on here for almost the last ten years :)

I have one like that in my C182. Over the years Cessna have added myriad gussets
and in some cases doubled up telescoping tubes to fix cracks and perhaps AD's. The top
tubes get so much heat from the exhaust they corrode badly under the heat shields.
I had to have mine rebuilt.

That is one reason for the Schertz beam as it moves the tubes out and
away from the exhaust. It is designed to take all the load on the front
rubber bushings. Jim Griswold, excellent engineer that he is, recognized these short
comings and that is why he designed  the beam system for the Questair Venture.

Paul Lamar ...No rotor no motor.

The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2006 All world wide rights reserved.