horsepower

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Related to horsepower: torque

horsepower,

unit of powerpower,
in physics, time rate of doing work or of producing or expending energy. The unit of power based on the English units of measurement is the horsepower, devised for describing mechanical power by James Watt, who estimated that a horse can do 550 ft-lb of work per sec; a
in the English system of units. It is equal to 33,000 foot-poundsfoot-pound,
abbr. ft-lb, unit of work or energy in the customary English gravitational system; it is the work done or energy expended by a force of 1 pound acting through a distance of 1 foot. It is equal to 1.356 joules.
per minute or 550 foot-pounds per second or approximately 746 watts. The term horsepower originated with James Watt, who determined by experiment that a horse could do 33,000 foot-pounds of work a minute in drawing coal from a coal pit.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Horsepower

an obsolete subsidiary unit of power. It was first introduced in the 18th century and continues in use in various branches of technology, mainly in automotive engineering. Horsepower is designated as ls. (Russian, loshadinaia sila), PS (German, Pferdestärke), CV (French, cheval-vapeur), and HP or hp (English). In the USSR and certain other countries 1 hp = 75 kilograms-force per m/sec ≈ 735.5 watts (W); in the USA and Great Britain 1 hp = 550 ft.lb/sec ≈ 745.7 W.

horsepower

[′hȯrs¦pau̇·ər]
(mechanics)
The unit of power in the British engineering system, equal to 550 foot-pounds per second, approximately 745.7 watts. Abbreviated hp.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

horsepower

A unit of power equal to 746 watts.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

horsepower

A measure of mechanical power equal to 550 ft-lb/s or 745.7 watts.

horsepower

1. an fps unit of power, equal to 550 foot-pounds per second (equivalent to 745.7 watts)
2. a US standard unit of power, equal to 746 watts
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

horsepower

The power of one horse. With regard to computers, which are clearly not compared to horses, the term is used to refer to speed in general. For example, "that machine has a lot of horsepower" just means that it is fast by comparison to contemporary models. See MHz.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
Powerful V8 engines produce either 275 or 302 horsepower, and the computer-controlled suspension holds the road firmly in its grip while also ensuring occupant comfort.
Note that AC inverters can only be adapted to extended frequency, constant horsepower, operation in those applications that use induction motors.
With the concept of technical efficiency assuming variable return to scale (TEvrs), that the boat worked with capacity less that its maximum capacity, the highest value was 1 , with engine of 40 horsepower. The lowest value of TEvrs was 0.
The six-cylinder has more power (325 horsepower, 354 pound-feet of torque), but the car is more than 260 pounds (118 kilograms) heavier.
Later ratings used firebox "heating area" to determine boiler horsepower, which closely followed the ratings used by some companies.
Assume impeller diameter and air density are constant, so the fan horsepower shall be increased 1.33 x 1.33 x 1.33 = 235% for one fan.
"It's very possible that we may expand the horsepower range, but we aren't coming out with an ag tractor," Blewett says.
"Maximum Horsepower: How to Strengthen Your Sales Force Quickly" is a manual focusing on this critical concept.
Under the teensy hood there's a choice of a 2.4-liter four-cylinder with 173 horsepower, or, in the Sky Red Line, a meatier 2.0-liter turbo four with 260 horsepower.
Horsepower keeps going up with the 2008 vehicles as well, though auto engineers say they're improving fuel economy at the same time.
As it is written now, the new standard applies to particulate matter and oxides of nitrogen emissions from all diesel-powered vehicles with 25 horsepower or greater.
But since almost all the gas engines in use are coupled with 80-inch and smaller mills, this horsepower is perfect.

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