On 23 Jul 2006 21:21:19 -0700, "abripl"
wrote:

One known problem is that aircraft engines turn CCW looking at the prop
but auto alternators have cooling fins optimized for CW. But thats not
apparently as much a problem as the pulley nut potentially comming
loose. For CW rotation the engine torque will tend to tighten the
pulley nut but for CCW it will tend to loosen it. It happened to me
today )on the ground) after 60 hours of use and the alternator was not
charging just spinning the pulley. Make sure you check your pulley nut
tightness ocassionally if you are using an auto alternator.


Are you telling me that all the aircraft versions of alternators have
left hand threads? Or even that alternators on engines that run
"backwards" or have the alternator on the back of the engine(like on a
Renault R12) have left hand threaded rotors?
I'm afraid I'd have to dissagree. Not ALL do. Perhaps SOME.
On counter-rotating marine engines, both alternators are the same.

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