[NSRCA-discussion] Hatori Short Pipe O-Rings

[Woodward, Jim]

Hi Guys,

 

What is the final verdict on these O-rings?  Will a warm run "melt" the
O-ring?  Does the viton replacement fit tight enough over the header?
Recently my plane is getting really messy, where as before there wasn't
a drop of burnt fuel ahead of the exhaust stinger.  I replaced the
o-ring but still had the mess.  I pull the motor last night and checked
out everything and the motor looks great, bolts were tight, with no
indication of any leakage from the motor or header to motor/flange
attachment.  

 

I am using the Nishioka spring clamp mount.  All things considered and
experienced, I think I prefer the stock Hatori mount that comes with the
pipe.  The Nishioka seems to allow for more fore and aft pipe slippage
during running due to the thin vertical white plastic supports (checked
while running the plane upside down to try and determine spray pattern
and such -  in which I didn't find one, which leads me to believe that
it starts to happen maybe later in the flight or heat cycle, versus the
small amount of running I did as a cursory check.

 

Thanks,

Jim
 
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