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post #2 of Old 05-21-2019, 11:51 PM
TUDOR
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Join Date: Jun 2009
Location: Sault Ste Marie, Ontario
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Re: Powering a 12 ton boat; need advice on big DC motors

Cooling

Can you use a large squirrel cage fan (oversized furnace fan) and duct in cooling air?

The 40 hp table motors at the steel mill where I worked live in an environment that can be as much as 50C and draw air from the oil cellar at 30C for cooling. The motors can be operated on as much as a 20% duty cycle

Rule of thumb - 1 hp electric motor = 1.25 hp gas engine

I'm not sure if a diesel equates the same way.

Bob

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