Paul and group,
I see that we have been making a large number of different Motor mount designs. 
Most of the designs are workable and should be
fine. One of the issues we need to be concerned with is long term reliability. 

Paul I wonder if it might not be a good idea to
put a schrader valve into one of the tubes of our motor mounts and pressurizing 
the mount to check for cracks. Paul you worked
on endurance racing cars, and if I recall correctly Porche used to put 
pressure valves on some uprights and A arms. The part
could be checked for cracks with just a pressure gage. You could do it 
once a week, or as part of the pre-flight. This would be
a good way to spot a failure due to fatigue. Lycoming mounts 
DO fail as well, could be good for them too.
Bill Jepson

Porsche used it on space frame chassis as well.
This is a very good idea. It should definitely be installed by at
least one commercial motor mount maker I can think of. I don't know why we
need to have a crash before he starts listening. Buyer beware.

Paul Lamar
 
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