Bob White wrote:

Hi Paul,

I have attached some photos of my rear motor mount for critical
analysis.  I cobbled this together just to see how it would look.

The two bolts on the left (pilot's) side are 8 MM.  The three on the
right side are 1/4 inch.  Both support bolts are 1/2".  The spacing on
the top bolt is about 6 inches, and the bottom about 3 inches.  The 1/2
inch washers are being used temporarily for spacing, and will be
replaced with smaller diameter tubing.  The rod used for the mount is
1/2" mild steel, and total length is about 13 inches.

The top plates are 1/4 inch thick, and the bottom are 1/8 inch.  (It's
what I had laying around.)  The angles at the bottom were originally
part of the landing gear and this area is very well supported.  I forget
what the spacing was on the front mount, but I think it is 28 inches. If
I grab the rear of the engine and shake it, the whole plane moves, and
it seems very solid latterly.

Assuming a final weight on the rear mount of about 60 lbs., will this
support 300 lbs for my typical 5 G landing, or is it woefully
inadequate?  Do I need any lateral support?

Thanks,
Bob White

- - - - - - -
http://www.bob-white.com
N93BD - Rotary Powered BD-4

That is almost good enough. You need a bracket between those two flanges
on the 2nd gen front cover you are using. I'll draw something up.
Do you have somebody close by that can tig weld?

BTW you can get rubber rod ends from, McMaster car that would be better
for this purpose..

Paul Lamar
 
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