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RE: TR4 fan Q2

To: <triumphs@autox.team.net>
Subject: RE: TR4 fan Q2
From: "Randall" <tr3driver@comcast.net>
Date: Mon, 7 Nov 2005 11:46:38 -0800
> The fan motor must have a permanent
> magnet field,
> because reversing the polarity of the input changed the direction of
> rotation.

AFAIK all of them do.  Certainly all of the aftermarket ones, as that's how
they reverse when mounted as a pusher.

Interestingly enough, the DeRale fan I bought also said to remove and
reverse the fan blades when mounting as a pusher.  Doesn't change airflow
direction of course, but the blades are more efficient one way than the
other.

Randall


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