It is not a good idea to weld on the RV socket tubes
for the landing gear. Tends to warp them and it is
hard to ream them out afterwards because they are so big.

Here is a rear motor mount design that will merely clamp
on to the existing motor mount tubes.

BTW here is the text I added to the motor mount suggestions
on the web site.

"FABRICATING YOUR MOTOR MOUNT.

Drill holes in a thick steel plate, bolt down the orginal mount, remove 
any tubes that need to be removed, heli-arc  weld on the new tubes and 
send it out for normalizing and re-heat treat. Then re-ream the bolt
holes."


Paul Lamar                       rvrearmt.gif
 
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