On Thu, 30 Sep 2004 07:06:42 -0700, "Jerry J. Wass"
wrote:

You're probably not driving it fast enough to cool itself--They'll put out
their rated amps at a low speed, but they're used to turning quite fast in
long time operation.
Calculate the cruise rpm from the auto it came from, then on your plane---

I drove one on my lathe as fast as I could, both fwd & reverse & could
find
hardly any difference in cooling air output.

I thought they went really fast because of the large pulley on the
flywheel. ASS sells an oversize driven pulley to slow them down. Some
people throw away the fan and instal a blast tube from the pressure
side since the fan has nowhere to draw cool air from anyway.
Drew


Paul Lee wrote:

I am using a mini Denso 45A alternator that just went on me when I put
the whole load on it. The load is not more than about 30A but is
continuous. Had another similar size alternator quit under load. What
is the problem/solution?

Since these automotive alternators are CW rotation (the cooling fan,
not the rest of the alternator) is this the problem - or does it
matter much? Or where can I get a lightweight CCW alternator or a
replacement fan for it? Or the rated load capacities are peak and need
bigger alternator for continuous 30A?

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SQ2000 canard: www.abri.com/sq2000