1HP = 1HP Re: Welp. Long winded answer.

Posted by buickanddeere on March 04, 2007 at 18:46:34 from (216.183.144.25):

In Reply to: Welp. Long winded answer. posted by steve from mo - dangit! on March 04, 2007 at 06:27:52:

1 electric HP = 1 internal combustion engine HP.
Where the confusion stems from is the electric motors ability to be momentarly overloaded to 225-275% times of it's rated capacity and still keep running. For a few seconds anyways which maybe enough to clear the overload.
Run a 7.5HP electric motor on a 10HP load and in a few minutes it will heat up and trip the thermal protection.
The internal combustion engine will keep loosing rpm and stall if the shaft torque exceeds 15-30% of the engine's torque when running at it's max HP rated rpms.
10HP is about the largest single phase motor you will find. 16HP is the largest I've found without going to a written pole motor.

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