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Horse power   Listen
Horse power  n.  
The power which a horse exerts.
(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.
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

... then, his sixty deaf men under old, angry, ill-conditioned Prejudice. We read of engines of sixty-horse power. And here is a man with the power of resisting and shutting out the truth equal to that of sixty men like himself. We all know such men; we would as soon think of speaking to those iron pillars about a change of mind as we would ...
— Bunyan Characters - Third Series - The Holy War • Alexander Whyte

... the big new ships which has been completed for the Grand Fleet. Below we have the number and calibre of the guns, the thickness and extent of the armour, the length, breadth, and depth of the vessel, her tonnage, her horse power, and her estimated speed. Everything is correct except the speed, which I happen to know is considerably greater than the figure ...
— The Lost Naval Papers • Bennet Copplestone

... coming by dead walls emblazoned with the finest examples of the lithographer's art, and by half-page advertisements in the Daily Evening News. On the contrary, it was a shabby little wagon show, which, coming overland on short notice, rolled into town under horse power, and set up its ragged and dusty canvases on the vacant lot ...
— From Place to Place • Irvin S. Cobb

... the water power of the United States (we like to get something in which we can excel our American cousins), and lying near the great centres of population too. Let me give you three examples. Within easy reach of Vancouver on the west coast there is at least 350,000 horse power, of which 75,000 is now in use. Winnipeg, the metropolitan centre of Canada, where more than in any place else can be heard the heart beat of the Dominion, has 400,000 horse power available, of which she now uses 50,000. Toronto lies ...
— The Major • Ralph Connor

... loveliness of John Jones; who, on the furthermost seat—far from the vain convenience of pew and velvet hassock—sits, and inwardly blesses the one shilling and fourteen shillings costs, that with more than fifteen-horse power have drawn him from the iniquities of the Jerry-shop and hustle-farthing,—to feed upon the manna dropping from the lips of the Reverend Doctor FAT! There sits John Jones, late drunkard, poacher, reprobate; but now, fined into Christian goodness—made a ...
— Punch, or the London Charivari, Vol. 1, October 9, 1841 • Various

... England set invention working on a definite, continuous {8} object. As the shafts were sunk to lower and lower levels, it became impossible to pump the water out of the mines by horse power, and the aid of steam was sought. Just at the close of the seventeenth century Savery devised the first commercial steam-engine, or rather steam fountain, which applied cold water to the outside of the cylinder to condense the steam inside and produce ...
— The Railway Builders - A Chronicle of Overland Highways • Oscar D. Skelton

... stinking paragraphs he'll put in the papers about himself: 'His second son, Mr. John Roden Conway, is taking out two Roden field ambulance cars which he will drive himself—'Mr. John Roden Conway and his field ambulance car. A Roden, 30 horse power.' ...
— The Romantic • May Sinclair

... make the engine," explained Norman. "It represents all the money Moulton and I have ever saved, some we haven't saved but expect to save, and all that we could borrow of our fathers. It's eighty horse power, came all the way from France, and if anything happens to it, we're bankrupt ...
— On the Edge of the Arctic - An Aeroplane in Snowland • Harry Lincoln Sayler

... construction of the machine upon which his fame rests. At last it was done, and did its work so perfectly that there could be no question of its success. Experiments showed that with it, one man, with the aid of two-horse power, could clean five thousand ...
— American Men of Mind • Burton E. Stevenson

... adopted is as follows:—Multiply the mean diameter of the rim by the number of its revolutions per minute, and square the product for a divisor; divide the number of actual horse power of the engine by the number of strokes the piston makes per minute, multiply the quotient by the constant number 2,760,000, and divide the product by the divisor found as above; the quotient is the requisite quantity of cast iron in ...
— A Catechism of the Steam Engine • John Bourne

... line was completed by Stephenson, he had great difficulty in getting permission to use an engine instead of horse power on it. Finally, Stephenson's new locomotive, The Rocket,—which first introduced the tubular boiler, and employed the exhaust, or escaping, steam to increase the draft of the fire,—was tried ...
— The Leading Facts of English History • D.H. Montgomery

... Watt's steam engines of the larger kind, an hourly consumption of ten pounds of coal is needed to produce a force equivalent to that of one horse, while in the smallest machines of only one horse power, twenty-two pounds are needed. See Prechtl, Technolo. Encyklopaedie, ...
— Principles Of Political Economy • William Roscher

... the series, and for the purpose of historical record, subjoined is a picture of the first Motor vehicle used (1904-1905) in Bristol for the rapid transport of His Majesty's Mails by road. No doubt, in process of time, this handy little 5-horse power car, built to a Bristol Post Office design, to carry loads of 3-1/2 cwt., and constructed by the Avon Motor Company, Keynsham, near Bristol, will have numerous fellow cars darting about in the roads and crowded thoroughfares of Bristol for the collection of letters ...
— The King's Post • R. C. Tombs

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