Re: Re: Re: Re: Proper Horse Power Conversion Calculations
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Posted by big fred on August 31, 1998 at 06:57:05:
In Reply to: Re: Re: Re: Proper Horse Power Conversion Calculations posted by John Healey on August 28, 1998 at 15:27:23:
: : Metric power is measures in kilowatts and Imperial power is measured in horsepower. there is 746 watts to one horsepower or 746 watts = 1 horsepower : Peter, I don't disagree that you can convert a horse power to kilowatts for use as a standard however, the real units of a horse power before conversion to another standard are still force,distance and time. For example if by hand I raise a bucket of water out of a well in a specific time I can calculate the horsepower it took to do that because I know the force(or weight ) , the distance , and the time. Knowing only these three things you are out of luck as far as putting the calculated HP in terms of Watts.However, if You now hook a motor to the rope and raise the same weight the same distance in the same time while measuring the motor voltage and current ( and knowing the motor effiency) you can calculate the Watts required to generate the same power. You can therefore make the conversion. The only point I am making is that the basis for all horsepower measurement is a mechanical measurement of force,distance, and time.John John, the watt is used by most engineers I know as the one unit of power in SI units, whether mechanical, electrical or thermal. It is equal to one Newton-Meter/Sec, with a Newton being one Kilogram-meter/second squared. My Mark's engineering handbook lists a metric horsepower also, and the conversion is 1 hp = 1.014 metric hp. Until I looked up metric horsepower this morning, I had never heard of it. Learn something new every day. Now what do you suppose is the origin of the metric horsepower?
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