X-Mozilla-Keys:                                                                                 
Wrathall Mark wrote:

grobbins wrote:

Won't there be a possible o-ring wear problem due to vibration ?
Grant

Paul wrote
Does not appear to be a problem as these are widely used in airliners
and military aircraft as well as most European race cars.
Some NASCAR guys are using them as well.

I don't think the Airliner usage is relevant. The 777 only has them on
the airframe side air-conditioning system, which is not subject to
anything like the vibrations of an intermittent combustion engine
connected to a prop, (even a rotary:-)). Wear is probably not a big
factor in a race-car that gets inspected and rebuild after each race
weekend either. I thing Grant has a valid concern here.

 Use teflon coated O-rings
if you can find them in that size. Anodizeing the sleeve
will surface harden it greatly. The sleeve will be cheap
to replace as well. 

Paul Lamar
 
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