Wrathall Mark wrote:

Thanks Perry and Paul for driving down to root cause on this, which in this
case sure looks like the broken tension bolt set off the this chain of
events. I will ammend the tension bolt page of the best practices page to
place more emphasis that application of RTV for bolt damping is recommended.
It is interesting that the comment was made that this is a known trick in
the racing community. There are a hell of a lot more 13B's in race cars than
in aircraft, so we should be learning from their experiences rather than
reapeating there mistakes. If anyone can think of an other known best
practices from the racing scene, please let us know.

Machining the water grooves is one I can think of. Could someone please
write up a summary of the weakness it addresses, the expected improvement
and the method of performing this. A simple email with attached pictures
would suffice.

Mark Wrathall
www.rotary.microcosman.com

 
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