Perry Mick wrote:

Paul wrote:
  I think you need to go down on the wall thickness of that big tubing.
  1/8 inch thick is going to be too heavy. 0.065 will be plenty strong.
   Also the four tubes holding the mounts in position could probably be
  1/2 inch OD .049 wall. So too could be the diagonals to the front of
  the engine. Just a small 3/16 bracket picking up only a few pan
  bolts at the front of the engine will be required as most of the
  load is out near the center of the engine.

Well, if that's all it takes at the front then there is no need to
bother with the 12A front cover.  I'll go the pan bolt route and see
how it works out.

  BTW you might want to think a bit about getting the engine
  out of the mount for maintenance. I know rotaries last a long time.
  Perhaps a bolt in tube here and there.

I think it be removable if the right bracket under the engine is a
bolt in piece like this latest drawing shows.

--
Perry J. Mick
Duckt N7XR
http://www.ductedfan.com

Forget the exit duct on top of the rads. Waste of weight.
Don't forget to taylor the inlet duct as shown however.

Paul Lamar
 
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