On Wed, 07 Sep 2005 12:18:46 GMT, john smith wrote:

Is it? Why would it be shorter than any other engine TBO? Do you have a
reference? If my engine's running out, I'd like to read up on it and find
out what's different.

Yes, hundreds of owners who fly competition aerobatics.
In competition aerobatics you are constantly and repeatedly going from
full throttle to idle. There is no in between setting.
The only time you fly at a given power setting for any length of time is
when you are flying from one contest to another.

Also maneuvers such as snap rolls produce some pretty stong forces on
the front seal and bearings when done at full power. That prop is
like a big gyroscope.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com