On 1/8/2006 5:51 AM, Jay Honeck wrote:

And mechanical failures should have simple explanations, no? WHY did
one of the cam lobes fail? Why didn't ALL of the cam lobes fail?

Timeless issue. www.aviationconsumer.com has hours of reading on the
subject. The common factor is infrequent flying.

I suppose the *real* issue should be: Why do camshafts work at all? When
you sit down and rationally analyze what is happening inside your engine,
the danged thing should just throw itself to pieces in the first ten minutes
of operation.

Yet, most of them don't.

Some, however, like Ray's engine, do -- and in very peculiar ways. (Just
ONE cam lobe went bad?)

Why?

I wonder if this was the first cam lobe to actually fail. Have they all
been measured and determined to be within spec?

--
Mark Hansen, PP-ASEL, Instrument Airplane
Sacramento, CA