Thanks, Bill. I'll give the url a try. I did take one of my motors
apart. It is a permanent magnet motor with "speed coils" inserted in
series with the motor as resistors to vary the speed. I'm also an
electrical engineer, BTW. The motor does generate when run in reverse
with a hand drill. Question now is whether towing it under sail will
generate enough to charge a battery. At 1100 rpm it put out over 5 volts.

BS

William Longyard wrote:
Jim Campbell at eCanoe is the most informed source out there for trolling
motors. He's an electrical engineer who holds a patent for trolling motor
innovations. He's a nice guy and very helpful when asked serious, concise
questions.

http://www.ecanoe.org/

Bill Longyard



"Bob S" wrote in message
...
Both Minnkota and Motor Guide produce electric trolling motors big enough
to use as auxiliaries on small sailboats. Has anyone tried running these
motors as generators to charge the on-board batteries? Does anyone know
the motor configuration (permanent magnet, shunt wound, series wound)?

BS