On Sun, 13 Jun 2004 00:04:25 -0700, "Peter Duniho"
wrote in Message-Id:
:

Well, we'd only climbed a few hundred feet when something in the airplane
started making a very strange noise. My friend's wife heard it too. It was
sort of a rapid "growling" sound, lasting a second or two at a time, with
maybe five or ten seconds between. It seemed most likely to be coming from
the engine, but it was subtle enough I couldn't rule out some sort of
airframe flutter.

From the description of the noise, it would be consistent with some
sort of vibratory resonance. Having actually experienced it, can you
rule that out?

It might have been my imagination, but it seemed like
whenever I heard the sound, there was a little deceleration from the
airplane.

As another has suggested, the tach/MP gage should help in diagnosing
any loss of power associated with the noise.


--

Irrational beliefs ultimately lead to irrational acts.
-- Larry Dighera,