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Horse power   Listen
noun
Horse power  n.  
1.
The power which a horse exerts.
2.
(Mach.) A unit of power, used in stating the power required to drive machinery, and in estimating the capabilities of animals or steam engines and other prime movers for doing work. It is the power required for the performance of work at the rate of 33,000 English units of work per minute; hence, it is the power that must be exerted in lifting 33,000 pounds at the rate of one foot per minute, or 550 pounds at the rate of one foot per second, or 55 pounds at the rate of ten feet per second, etc. Note: The power of a draught horse, of average strength, working eight hours per day, is about four fifths of a standard horse power.
Brake horse power, the net effective power of a prime mover, as a steam engine, water wheel, etc., in horse powers, as shown by a friction brake. See Friction brake, under Friction.
Indicated horse power, the power exerted in the cylinder of an engine, stated in horse powers, estimated from the diameter and speed of the piston, and the mean effective pressure upon it as shown by an indicator. See Indicator.
Nominal horse power (Steam Engine), a term still sometimes used in England to express certain proportions of cylinder, but having no value as a standard of measurement.
3.
A machine worked by a horse, for driving other machinery; a horse motor.






Collaborative International Dictionary of English 0.48








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"Horse power" Quotes from Famous Books



... evidence of the highest authorities on this point, it appears to have been conclusively established, that the cost of upholding steamship machinery has of late years amounted, on the average, to about L6 per horse power per annum, being about 12 per cent. per annum, on the prime cost of the machinery, which annual outlay is but one of the grand points of current expense in which steamship proprietors are concerned." Now, ...
— Ocean Steam Navigation and the Ocean Post • Thomas Rainey

... ligneous portions of the plants and setting the latter free for other uses. The power thus silently exerted is enormous; for every ton of carbon separated in twelve hours necessitates an expenditure of energy represented by at least 1,058 horse power, but the action is spread over an enormous area of leaf surface, rendered necessary by the small proportion of carbonic acid contained in the air, by measure only 1/2000 part, and hence the action is silent and imperceptible. ...
— Scientific American Supplement, No. 441, June 14, 1884. • Various

... sheddeh o nusbeyteen, Ibbi sheddeh o heftedeen, etc., with a keen sympathy with their difficulties and well-smudged tin slates. An additional evil is that the Arabic books printed in England, and at English presses here, require a 40-horse power microscope to distinguish a letter. The ciphering is like ours, but with other figures, and I felt very stupid when I discovered how I had reckoned Arab fashion from right to left all my life and never observed the fact. However, ...
— Letters from Egypt • Lucie Duff Gordon

... machine, and Carville followed me down stairs. He got in and waved his hand. With a spring the car leaped from the kerb—no other word will describe the starting of that car. I suppose it must have been at least a hundred horse power. In a flash it was round the corner and gone. I climbed into my cab and made my humble way to Liverpool Street, eventually reaching Wigborough, and taking up the daily round and the ...
— Aliens • William McFee

... and one-third feet deep to the structural deck. The strength and safety of the hull are increased by five water-tight compartments. Propulsion is effected by a pair of modern stern paddle-wheel engines capable of being worked up to over two hundred and fifty horse power, giving her a speed of ten miles an hour. She has stateroom accommodation for twenty-two passengers, draws three and a half feet of water aft, and eats up half a cord of wood an hour. She will carry to the northern posts their trading-goods ...
— The New North • Agnes Deans Cameron

... feel the nawin's of hunger. And after we went through Machinery Hall we went through the machine shops, at a pretty good jog, and the power-house, where there is the biggest engine in the world—24,000 horse power. ...
— Samantha at the World's Fair • Marietta Holley

... tests and calculations, at which he was an expert, and applied the brake test, to see how much horse power the ...
— Tom Swift and his Wireless Message • Victor Appleton

... from the "forty-horse power" of a steam-engine. That mad wag, the Reverend Sydney Smith, sitting by a brother clergyman at dinner, observed afterwards that his dull neighbour had ...
— The Works of Lord Byron, Volume 6 • Lord Byron

... a strange animal. We cannot calculate on his forces like that of an engine; and, though an impulse draw with a forty-horse power at what appears willing to yield to one, yet in contempt of calculation the movement is not effected. Neither grief, philosophy, nor love could make Perdita think with mildness of the dereliction of Raymond. She now took pleasure ...
— The Last Man • Mary Shelley

... whipped a slave to death, it put the fear into the other slaves. The brother of the man who owned my mother had many black people. He was too mean to live, but he made it. Once he was threshing wheat with a 'ground-hog' threshing machine, run by horse power. He called to a woman slave. She did not hear him because of the noise of the machine, and did not answer. He leaped off the machine to whip her. He caught his foot in some cogs and injured it so that it had to be ...
— Slave Narratives: A Folk History of Slavery in the United States - From Interviews with Former Slaves: Indiana Narratives • Works Projects Administration

... small muscles but splendid vitality. If we are to test vitality in muscular terms at all—that in itself being a quite indefensible assumption—we must do so in terms of endurance, and not in terms of horse power or ass power, at any ...
— Woman and Womanhood - A Search for Principles • C. W. Saleeby

... her large arms, we seized her hands vigorously; the captain laughing heartily as did the other passengers at the tug now being made. We pulled with a will, but Mrs. Walker remained on the deck. A one horse power was needed. The pullers took breath, and again took hold, this time calling upon the captain to lay-to a helping hand; the captain prepared to do so, and as she was being raised, he having a good foot-hold, ...
— The Underground Railroad • William Still

... travelling through that state, a few years since, on my way from Providence to New London, at a time when a new road had just been opened. It was on a Sunday, and the stage—a four-horse power, you must know—had never yet run through on the Lord's-day. Well, we might be, as it were, off here at right angles to our course, and there was a short turn in the road, as one would say, out yonder. As we hove in sight of the turn, I saw a chap at the mast-head of a tree; ...
— Homeward Bound - or, The Chase • James Fenimore Cooper

... thickness from 18 in. to 20 in., behind which is an inner skin of steel 2 in. thick. The engines are being constructed by Messrs. Humphreys, Tennant & Co, London, and are of the vertical triple expansion type, capable of developing a maximum horse power of 13,000 with forced draught and 9,000 horse power under natural draught, the estimated speeds being 16 and 171/2 knots respectively at the normal displacement. The regular coal supply is 900 tons, which will enable the ship to cover a distance ...
— Scientific American Supplement, No. 810, July 11, 1891 • Various

... gang worked. He saw to it that the cotton was took to the gin. They used oxen to pull the wagons full of cotton. There was two gins on the plantation. Had to have two for it was slow work to gin a bale of cotton as it was run by horse power. ...
— Slave Narratives, Oklahoma - A Folk History of Slavery in the United States From - Interviews with Former Slaves • Various

... first known as the Prentiss & Page, and later as the Page mill. There was a time when all the coffee establishments in New York sent their coffee to Prentiss & Page to be ground. Some of the places roasted by hand, others by horse power; and if by steam, it was limited, and they did not have ...
— All About Coffee • William H. Ukers

... considerably well peopled, with folks that are good marks; and if there is no real right down good preacher among them, we build a handsome Church, touched off like a New York liner, a real taking looking thing—and then we look out for a preacher, a crack man, a regular ten horse power chap—well, we hire him, and we have to give pretty high wages too, say twelve hundred or sixteen hundred dollars a year. We take him at first on trial for a Sabbath or two, to try his paces, and if he takes with the folks, ...
— The Clockmaker • Thomas Chandler Haliburton



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