Horsepower Defined

Have you ever wondered the origin and meaning of the term "horsepower? Horsepower is a unit of measurement that is used to define the rate in which work is done. There are various standards and types of horsepower.

The most 2 well known horsepower terms are mechanical horsepower and metric horsepower. Mechanical horsepower is often refereed to as imperial horsepower is 745.7 watts. Metric horsepower is 735.5 watts.

James Watt, a Scottish engineer used the term in the 18th century for a comparison of the output of draft horses versus steam engines. Since then the term has been adapted for measurement of the output of other engines.

Today the term horse power is used frequently when referring to all types of engines. A dynamometer measures the torque, then converts it to horsepower by using the formula Torque x RPM 5252. In the English system horsepower is used to express the rate at which mechanical energy is used.

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