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On 23 Jul 2006 21:21:19 -0700, "abripl" <ignord_eml@hotmail.com>
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 am afraid I would have to dissagree. Not ALL do. Perhaps SOME.
On counter-rotating marine engines, both alternators are the same.
--
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Re: Problem with auto alternators
