Subject: Backward alternators
From: Rotary Engine
Date: 5/27/2008, 8:19 PM
To: AAA Put this in the To box



       Hi Paul,
       One of the pix in this posting shows the alternator riding
       "backwards"
       from its normal orientation ( pix # Rb13b006.jpg ). This means the
       cooling fan built into the alternator is turning the opposite
       direction
       from its designed intent. Do you or anyone on here know if this will
       lead to an overheating problem considering the high electrical
       demands
       of EFI systems? Thanx,  Dave M

       I don't know.

       Paul Lamar ...No rotor no motor.


   YES!

   We had a flight test airplane with heavy duty alternators, this was
   a Cessna
   Skymaster with a heavy amp load, we burned out several of them before we
   determined that the ram air cooling was opposed to the cooling fan
   vanes.

   Do it right!

   Bob


Dave,

Some alternators are designed to run CW and some CCW.  Pick one that
runs the direction you intend to turn it and you shouldn't have a
problem with cooling.

Mark S.


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