In a message dated 12/28/2005 7:02:19 PM Pacific Standard Time,
atlasyts@bellsouth.net writes:
Monty,
Carbon
is old-speak, most are going for Tracys' ceramic seals. The take a while to
break in, but seem to last very well. Rotor housing wear hasn't
been a problem for anyone not using a 100,000 mile motor to start with. Ed
Anderson ran into some trouble with ROTOR tip seal slot wear, check
yours carefully. I defer to Tracy, Ed and Lynn as to the corner seals,
nobody I know has really worn out a motor. (including racers in sedan
classes!)
Bill
Jepson
Bill, Tracy's seals are not ceramic. They are made from a super secret
Unobtainium metal:)
Buly
To everybody on fly rotary, MEA CULPA. Incorrect listing for the ceramic
seals!
Tracy's seals are listed as a "Proprietary alloy" that is not a derivative
of gray cast iron as most are. (Mazda's as well) I was thinking of ceramic
seals. Then Tracy's seals and blurted that out.
Lynn, My dad was a ceramic expert. The softest true ceramic is so hard that
it can only be machined using diamond grinding processes, hence the "stupid"
prices. (I agree that the actual ceramic seals are hideously expensive)
Monty, I do still say that carbon seals are not a good Idea for an
aircraft engine. Go with something more durable like Tracy's or the high priced
ceramic. Fortunately for us Tracy's seals are getting good reports from the car
guys using them at ridiculous RPM and pressure. They should last well in our
engines. Tracy's seals are much cheaper as well so let's get some!
Buly, I am planning to start an UNOBTAININUM mine real soon, wanna buy
stock?
Bill Jepson