Horsepower

The horsepower (hp) is the name of several non-metric units of power. In scientific discourse the term "horsepower" is rarely used due to the various definitions and the existence of an SI unit for power, the watt (W). However, the idea of horsepower persists as a legacy term in many languages, particularly in the automotive industry for listing the maximum power of internal-combustion engines.

Related Topics:
Unit - Power - SI - Watt - Automotive - Internal-combustion engine

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An earlier, and now largely obsolete, usage refers to a type of machinery, known variously as a horse power or horse-power, in which the pull or weight of a horse or horses was converted into power to drive other machinery, such as a thrashing machine. (1864 Webster .. 3. Horse-power. A machine operated by one or more horses; a horse engine.)

Related Topics:
Thrashing machine - Webster

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The various types of horsepower (metric) are:

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