X-Mozilla-Keys:                                                                                 
One of the problems in making a mount is you have 
to provide for about 1 1/2 degree side thrust in 
most homebuilt designs. Sometimes down thrust as 
well.

I found a bunch of 1" by 1 1/2" by 3/32" thick punched angle
lying around. The holes are about 3/8th dia. on one inch
centers. I think it is used by the garage door opener
industry for installing electric garage door openers. 

I am going to bolt up a 36 by 18 by 18
diagonally braced box. I can then provide 3D hard points
within the torsionally ridgid box for the motor mount
tubes. The perfectly orthogonal box will also provide 
a measurement reference system for getting the side and 
down thrust angles correct.

When I am done I can unbolt it and it won't take up 
a lot of storage room. I will upload some pictures
soon.
 
Paul Lamar
 
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