> >> Paul, Would Teflon work? As I recall teflon isnt rated to more than

 >> 280 deg f continnous. But of
 >> course neither is rubber, perhaps the cooling holds down the temp but
 >> I don't know exactly how.
 >> Bill Jepson

 > Teflon is the highest rated plastic commonly available. Somewhere
 > between 600 and 800 F. For awhile all new rotor housing inner surfaces
 > were coated with teflon. Not only is it the highest temp plastic it
 > is also inert to almost all chemicals. Notice that the TES O-rings
 > are rated 100 degrees higher (500 F) than Viton (400 F). The rotors
 > in a 13B run 500 degrees F millimeters away from the oil scraper
 > O-rings so
 > this is why I am pushing so hard for teflon encapsulated silicone
 > O-rings.
 > Here is a chart for O-ring characteristics.
 >
 > Slotted Teflon cylinders in the seal location should be tried as they
 > have a much much lower resonant frequency. Those tiny, fat, C shaped,
 > cylindrical metal corner seals are resonating and shattering.
 > Teflon was not around when Felix Wankel designed the corner seals :-)

 I suppose it is worth a try, but not in an airplane, the corner seals
 are not really a problem piece.  I think that the rubber plugs help
 startup, it seems like the solid corner piece cars start a little
 harder.  I think the stock ones stand up amazingly well.  You can
 always use the solid ones, most racers do.

 Hans

   I run the corner seals with the rubber plugs in one of my engines
and they mushed out and when I was in a hurry to get flying one time
and tried to find some Rob Golden told me to leave them out as they
only made any difference at low RPM so I did and found that it ran
fine without them.
  I do prefer to run the early corner seals from the 84 -85 GLESE
without the plug holes but they were not available new when I built
my last engine so I assume they are history now.

   Ken

   Correction It is the apex seals from the 84 - 85 GLESE that I use,
the corner seals are from the 12a engines.

  Ken

 
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