Paul--

Appreciate very much what you have made available in design
considerations for adapting the Wankel engine for aircraft use. Am
building a Pazmany PL1 with the Mazda 13B and are currently
designing/building the engine mount.

Am concerned about the compressive loads in lower tubing of the engine
mount when they are moved from the vertical plane to an oblique
situation--I know that an I beam is strong vertically but has no where
near the capacity when it is twisted.  Also have a question about the
relationship/ramifications of -3 degree drop from level of the engine
thrust line compared to the center line of the aircraft when we,
seemingly have to drop the engine 3" below the center line of the
aircraft for cowling considerations. We bought the PL1 in more or less a
quick build situation and are trying to finish it up.

Any suggestions/help you will provide will be greatly appreciated.

Tom Chapman

Send me a sketch of what you are doing with the motor mount
and and firewall hard points dimensions and I will do a 3D and
calc the loads.

3 inch  pitch line drop will change the pitch response of the
airplane with a sudden application of power. Lowering the thrust
line may add a pitch up tendency as the thrust line may  pass below
the CG. I have no idea where the CG is now so I cannot say for
sure what will happen.

I suggest making the down thrust angle adjustable using a Questair
Venture style strut rear motor mount so you can fine tune it.

Use 1/2 inch left and right threaded rubber rod ends from
McMaster Carr.

Paul Lamar ...No rotor no motor.

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