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Old 05-04-2010, 09:51 AM   #6 (permalink)
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Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Geo Metro
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And here's option 1 of the two e-motors on hand:

This is the permanent magnet power steering pump motor from the forklift.

5.5 inches diameter, 11 in. long, 32 lbs.

It's only rated .88 hp, continuous duty at 48v.

Consider: the ICE is rated 15 hp, peak. But for perspective, the vast majority of the time I run the engine, I'm basically putting around at 1/4 throttle, just to get in and out of harbours/docks/anchorages. Probably using about 3 hp.

Of course, we all know electric motors can be run at outputs well above their ratings, provided you don't melt them. Since the motor won't be used in the boat for extended periods, I'm thinking a small one may be OK.

Option 2 is the twin / "backup" motor to the one in the ForkenSwift, though it's actually overkill in terms of power and weight (8 in. diameter, 15 (?) in. long, 110 lbs).

It's a bit of a Goldilocks situation: the ideal motor, the one that's juuuuuuuust right, is probably somewhere in between these two.

Maybe I'll drop by the forklift place and see if the guys have something else on hand that's surplus/headed to the scrap yard.
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