HP is HP what you need to reference is torque

Posted by jack cain on Wednesday, April 11, 2007 at 22:44:43 :

In Reply to: off topic horsepower question posted by ccsammy on Wednesday, April 11, 2007 at 22:31:17 :

HP is the measure of work done over time.

1 HP produced by an electric motor is equivalent to 1 HP produced by a gas or diesel engine.

What you want is to find a gas or diesel engine that produces the same amout of Torque at the specified RPM as your electric motor.

If you don't know the torque rating for your electric motor here is a formula for approximating the output.

A 1 horsepower (746.0 watt) motor operating at base speed of approximately 1750rpm produces 3 foot-pounds of torque.

That would put your torque rating at approximately 45 foot lbs. Your should look for a engine with at least this minimum rating in the specified RPM band,

Follow Ups:

• Great Info Jack, Thank You ntxt - Paul (in NY) 08:19:08 04/12/2007
  • David's explanation is better - jack cain 10:31:07 04/12/2007
• Re: HP is HP what you need to reference is torque - Jerry in Idaho 00:32:38 04/12/2007
  • Most train engines use what ? - wet coast bruce 00:49:16 04/12/2007
    • Re: Most train engines use what ? - M Fanoni 12:20:42 04/12/2007
    • Re: Most train engines use what ? - MoparNorm 08:34:57 04/12/2007
      • Yeah! - Mr.PG 03:18:17 04/13/2007
        • Re: Yeah! - MoparNorm 11:31:42 04/13/2007
          • Re: Yeah! - Mr.PG 15:55:56 04/13/2007
            • Re: Yeah! - MoparNorm 20:53:43 04/13/2007
      • Re: Most train engines use what ? - Jerry in Idaho 11:15:23 04/12/2007
      • Mine motors - David Sherman 10:36:10 04/12/2007

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