Paul, I have had some time to get back to my CAD education with Alibre.
I'm working out the cowl profiles, and was wondering if you had some
simplified models of
the 13b in combination with the RD-1c and Doddridge plate. I was hoping to
kinda stick
them in to make sure everything clears. I'm using the extended mount
dimensions for the
lightweight version of the 13b on the Zenith CH-640.
C. Smith

Try some of these.

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Here is what the jpgs renderings look like from that igs file I just
sent.

I have a model of your engine and motor mount.
Send me a sketch of what you want the cowl to look like
and I will send some renderings and igs if you wish.

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Here is the Rhino model I have.

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More views.

Looks like the best place for the rad
is underneath  with your extended MM.

PauL Lamar



C. Smith,  I am attaching a rhino file of the Mazda 13B which I got from the
newsletter. It is dimensionally accurate and I have used it on three
fusaloge designs since I got it.  You can erase any or all of the motor
mount tubes or rotate and extend them to your hard point locations. Besides
being dimensionally accurate it does not add significantly to the drawing
file size. I saved the dimensions of Jeff's motor mount plate when it was
being reviewed on the newsletter but have not done a solid model of it. The
attached file has a Schertz beam mount but can be swapped for Jeff's plate
since the attached file is an assembly drawing of the individual parts and
can be edited.

george grimes

Too big to publish George. Alibre probably won't load
3dm files anyway. Export it as igs and zip it to reduce
the size and send that.

Paul Lamar