General Knowledge - General Science - Discussion

Horsepower (hp) is the name of several units of measurement of power, the rate at which work is done. The most common conversion factor, especially for electrical power, is 1 hp = 746 watts. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses. It was later expanded to include the output power of other types of piston engines, as well as turbines, electric motors and other machinery. The definition of the unit varied between geographical regions. Most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on January 1, 2010, the use of horsepower in the EU is only permitted as supplementary unit.

Horsepower (hp) is the name of several units of measurement of power. The most common definitions equal between 735. 5 and 750 watts. [1] Horsepower was originally defined to compare the output of steam engines with the power of draft horses in continuous operation. The unit was widely adopted to measure the output of piston engines, turbines, electric motors, and other machinery. The definition of the unit varied between geographical regions. Most countries now use the SI unit watt for measurement of power.

Horse power is used 5 ways.

Hydralic horsepower is 745.699872 watts.

Metric horsepower is 735.499872 watts.

Electric horsepower is 746 watts.

Boiler horsepower is 9809.5 watts.

Mechanical horsepower is 745.699872 watts.

Horsepower is a unit of measurment of power. It measure the capacity of any electical motor or appliance in camparison to horse's power. In 1859, john mackliene used this unit first to define power of engine.

A foot-pound-second unit of power, equivalent to 550 foot-pounds per second, or 745.7 watts.

Metric HP = 746 watts.
British HP = 735.5 watts.

What is draft horses? Please explain.