This is a sketch of the tripod that connects
the rear T extrusion based motor mount bracket
to the firewall. This took a lot of time to
fabricate and weld up. I would not do it this way
again for a composite airplane like the Kis Cruiser.

I was dumb enough not to just copy Jim Griswold's
brilliant design on the Questair Venture and use
a simple 14 inch long strut with ball joints on both ends
hanging off the top of the firewall and connected 
to the front of the engine. Both front rubber mounts
are more than strong enough to take all the thrust,
locate the engine laterally and hold the thrust line 
in alignment in the horizontal plane so no help is
needed from the rear mount. The hanging strut will
only restrain the engine vertically. I'll do a sketch
and a picture of the Questair rear mount soon.

If you use a left and right threads on the strut 
and upper and lower ball joints you can quickly adjust the
the angle of the thrust line in the vertical plane.
One of the go fast secrets of the Questair Venture.

On the other hand with this tripod  I will have to use shims 
under the rubber bushing to adjust the thrust line angle
in the vertical plane.

I spent so much time on this tripod that I will
go with it for now. Picture after I get it 
powdered coated.

BTW A fabrication tip on the cup that holds 
the rubber bushing.

If you have a lathe, weld the plate to the top
of the short section of tubing first and then drill
the bolt hole in the plate on the lathe and turn down 
the final diameter of the plate. Much quicker than making 
a thick washer and trying to weld it to the top of the 
tube and keep it concentric. 

Paul Lamar
 
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