"Morgans" wrote in
:


"Bertie the Bunyip" wrote

Not to mention one extraordinary J-3 that just went on forever. I
think it did over 4,000 hours without even a top end and it lived in
the pattern.

Yep.

As many times Jay says over and over that pattern work will wear out
an engine, I just don't think that is a given.

The biggest thing I believe that backs it up, is that the average HP
output per hour is less than what it would be at an all day long 75%
cruise power setting.

That, plus the fact that the average single engine mill is built hell
for stout, and does not make much power per C.I.

True. The thing that kept this engine going was probably the fact that it
ran most of the day almost every day. No time for the oil to settle, so
startup wear was minimised, and of course corrosion didn't get a chance to
take hold because the oil never really drained away completely.


Bertie