| 单词 | screw propeller |
| 例句 | The 164-foot-long warship featured a revolutionary propulsion system, with screw propellers powered by an engine placed under the ship to protect it from enemy fire. How a warship explosion led to the first marriage of a sitting U.S. president 2022-02-14T05:00:00Z The ship sported the newest improvements, including being the first steamship to use a screw propeller and the world’s longest ship’s cannon, called the Peacemaker. Opinion | The story of a former Jefferson slave gives us a window to history 2018-03-02T05:00:00Z The broad part of an oar; also, one of the projecting arms of a screw propeller. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z The pressure that propels a vessel is taken by the thrust block in a screw propeller engine. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z It goes through the water at about thirty miles an hour, having three or four screw propellers. In Pastures New 2011-12-23T03:00:12.717Z In 1812 he laid before the Navy Board his invention for a screw propeller for ships, only to meet with a refusal. Cornwall 2011-12-05T03:00:38.530Z The screw propellers of turbine steamships are made of small diameter, that they may rotate at high speed without undue waste of power. The Story of Great Inventions 2011-10-05T02:00:16.353Z On each of the four sides was a screw propeller 12 feet in diameter, driven by bichromate of potassium batteries and a dynamo-electric motor. The Great War in England in 1897 2011-09-20T02:00:17.083Z The thread of a screw propeller is its length measured along the outer edge of the blade. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z A native of Sweden, Mr. Ericsson moved to London and produced one innovation after another, including a screw propeller to replace the paddle wheel on the steam-powered warship. A Brief Dry Spell for the U.S.S. Monitor 2011-08-08T17:50:03Z The earliest, most successful demonstrations of screw propellers and paddle wheels in steam vessels in the century were the construction and use of a boat with twin screws by Col. Inventions in the Century 2011-07-20T02:00:14.643Z So the large fan or screw propeller on an air-ship drives the air backward, and the air reacts and drives the ship forward. The Story of Great Inventions 2011-10-05T02:00:16.353Z He did much to promote the adoption of steam and the screw propeller in war-ships. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z There were twin screw propellers, which could be adjusted to different angles in practice, to provide for steering, and made 1700 revolutions a minute. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z The United States Navy commissioned a warship, the Princeton, that proved to be one of the most advanced in the world, thanks to a screw propeller and other innovations by Mr. Ericsson. A Brief Dry Spell for the U.S.S. Monitor 2011-08-08T17:50:03Z When within half a mile of the shore, the water in the harbor became too shallow for large vessels, so the screw propeller of the Moltke ceased revolving and the ship came to anchor. A Trip to the Orient The Story of a Mediterranean Cruise The submarine is driven by a screw propeller, and some submarines are lowered by means of a vertical screw. The Story of Great Inventions 2011-10-05T02:00:16.353Z The first step towards the revolution was taken many years ago when the screw propeller was substituted for the paddle-wheel. Twentieth Century Inventions A Forecast The wing, both when at rest and when in motion, may not inaptly be compared to the blade of an ordinary screw propeller as employed in navigation. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z Before each of them glittered something silvery, like glass, which was not a screw propeller but somehow drew them on. The Fifth-Dimension Tube There was merely a long, rectangular wing with a framework beneath it, and a shimmering thing which was certainly not a screw propeller, but which seemed to draw it. Astounding Stories of Super-Science January 1931 The blades of the windmill and the electric fan are shaped very much like the screw propeller. The Story of Great Inventions 2011-10-05T02:00:16.353Z Such as the windmill is for wind and the turbine water-wheel for water was the screw propeller, although adapted, not as a generator, but as an application of power. Twentieth Century Inventions A Forecast Both Braithwaite and Ericsson became subsequently residents of the United States, and the latter achieved immortal fame as the inventor of the screw propeller and the builder of the Monitor. The Railroad Question A historical and practical treatise on railroads, and remedies for their abuses And there was a glittering something before it that obviously was its propelling mechanism, but as obviously was not a screw propeller. The Fifth-Dimension Tube Among remarkable patents of theirs, are patents for electrical lighting, noiseless elevated roads, apparatus for raising sunken vessels, sewing-machine motors, screw propellers, agricultural tools, spinning-machines, locomotive wheels, burglar alarms. Miss Ashton's New Pupil A School Girl's Story The screw propeller, driven by an engine, would drive the water back if the ship were firmly anchored, just as the fan drives the air. The Story of Great Inventions 2011-10-05T02:00:16.353Z In passing through the Straits, after leaving Anger, H. B. M. screw propeller "Rattler" went up on her way to China. Kathay: A Cruise in the China Seas They were consequently of light draught, so much so that to obtain the necessary motive power they each had four screw propellers of small diameter, and they carried four eleven-inch guns in two turrets. Admiral Farragut While the last few years have seen great advances made in the designs of steamships and of their engines, little or nothing has been done in the way of improving the screw propeller. Scientific American Supplement, No. 647, May 26, 1888 To make his meaning quite plain, he gives a rough sketch of the screw propeller, with four turns as used to-day. James Watt It was a cigar-shaped balloon, with a screw propeller run by an electric motor of eight horse-power. The Story of Great Inventions 2011-10-05T02:00:16.353Z H. B. M. screw propeller "Reynard," immediately got up steam, thirty men and officers from our ship were transferred to the little American steamer "Spark," and both vessels started in hot pursuit. Kathay: A Cruise in the China Seas Engines and boilers were aft, and the long overhang of the armoured deck astern protected the under-water rudder and screw propeller. Famous Sea Fights From Salamis to Tsu-Shima He had invented a screw propeller for boats, and found a splendid market for this type of machinery. Historic Boyhoods Thus the idea of the screw propeller to be worked by his own improved engine was propounded by Watt one hundred and thirty-five years ago. James Watt The screw propeller is driven by compressed air. The Story of Great Inventions 2011-10-05T02:00:16.353Z At the very time that the screw propeller was initiating a revolution in the method of steam propulsion, another revolution was taking place in shipbuilding material. How Britannia Came to Rule the Waves Updated to 1900 The oil is stirred by means of a screw propeller. On Laboratory Arts When the change from this primitive device to the screw propeller came it was a veritable leap in naval architecture. Steve and the Steam Engine Its motive power is in its tail, which is a screw propeller. In the Track of the Troops “Well,” said I, as he looked at the index of the ungainly thing, which is something of a cross between a shark hook and a miniature screw propeller. The Ghost Ship A Mystery of the Sea They existed, however, till steam power and the screw propeller caused those that had escaped destruction to be broken up or sold out of the service. How Britannia Came to Rule the Waves Updated to 1900 As regards the propeller, as we know, except in certain cases, the paddle-wheel has practically disappeared, and the screw propeller is all but universally employed. Scientific American Supplement, No. 312, December 24, 1881 There were side-wheelers, awkwardly constructed boats with sprawling paddles, screw propellers, and twin-screw craft; ferryboats, tugs, steam yachts, and ocean liners. Steve and the Steam Engine The outrigger launch referred to was a goodly-sized boat, fitted with a small engine and screw propeller. In the Track of the Troops That as the wing is in its stroke an arc of a screw propeller's operation, and in its angle a screw propeller blade, its animal operation compels its reciprocation instead of rotation. Scientific American Supplement, No. 443, June 28, 1884 It was propelled through the water by means of a screw propeller, worked by manual power; a similar screw, arranged vertically, enabled the boat to rise or sink at will. How Britannia Came to Rule the Waves Updated to 1900 For good business and Christian integrity are twin screw propellers. "Say Fellows—" Fifty Practical Talks with Boys on Life's Big Issues Professor Greenhill has advanced in our pages a new theory of the screw propeller. Scientific American Supplement, No. 561, October 2, 1886 It was in such mood that the old New Yorker of 1796 witnessed the going of Fitch's little screw propeller on the Pond. Notable Events of the Nineteenth Century Great Deeds of Men and Nations and the Progress of the World Moored in the bay were two war-steamers, with screw propellers; but they had all their sails unfurled, and swung uneasily to and fro. The Felon's Track History Of The Attempted Outbreak In Ireland, Embracing The Leading Events In The Irish Struggle From The Year 1843 To The Close Of 1848 Thus a great advance has been made on the old method of trial upon the ship itself, which was the origin of almost every conceivable erroneous view respecting the screw propeller. Scientific American Supplement, No. 821, September 26, 1891 Just as in turbines a combination of impact and reaction produces the maximum practical result, so in screw propellers does a corresponding gain accompany the same construction. Scientific American Supplement, No. 460, October 25, 1884 The frictional resistance of screw propellers is always a fruitful source of inefficiency. Scientific American Supplement, No. 598, June 18, 1887 He accordingly set out from New York for Kentucky, but not till he had invented, or rather constructed, a steamboat, which was driven by a screw propeller! Notable Events of the Nineteenth Century Great Deeds of Men and Nations and the Progress of the World In order to give a reasonably clear explanation, it will be well to review in a primary way some of the definitions or terms used in connection with and applied to screw propellers. Flying Machines: construction and operation; a practical book which shows, in illustrations, working plans and text, how to build and navigate the modern airship Mr. Marshall's paper of 1881 it was said that "the screw propeller is still to a great extent an unsolved problem." Scientific American Supplement, No. 821, September 26, 1891 The ordinary paddles of a steamer impel a mass of water horizontally backward by impact alone, but screw propellers use reaction somewhat disguised, and only to a limited extent. Scientific American Supplement, No. 460, October 25, 1884 This toy was composed of a small rotating screw propeller, which revolved on its own support when the piece of string wound round it was pulled sharply. Wonderful Balloon Ascents But, so far as we could learn, the marine engineers possessed only empirical formulae, and the exact action of the screw propeller, after a century of use, was still very obscure. A History of Aeronautics The angles of any screw propeller blade having a uniform or true pitch change gradually for every increased diameter. Flying Machines: construction and operation; a practical book which shows, in illustrations, working plans and text, how to build and navigate the modern airship The screw propellers were nearly 18 feet in diameter, each with two blades, while the engines were capable of being run up to 360 horse power. The Dominion of the Air; the story of aerial navigation So with screw propellers the great mass of surrounding water may be regarded as acting like a channel with elastic sides, which permits the area enlarging as the velocity of a current passing diminishes. Scientific American Supplement, No. 460, October 25, 1884 These were the building of iron instead of wooden ships and the replacing of the paddle wheel by the screw propeller. Sinking of the Titanic and Great Sea Disasters Sir George also advocated the screw propeller worked by some form of "explosion" motor, which at that time had not arrived. The Mastery of the Air All screw propellers having a pitch equal to their diameters have the same angle for their blades at their largest diameter. Flying Machines: construction and operation; a practical book which shows, in illustrations, working plans and text, how to build and navigate the modern airship Had his experiments been simply confined to his classical investigations of the proper form of the screw propeller his name would still have been handed down as a true pioneer in aeronautics. The Dominion of the Air; the story of aerial navigation Therefore, it becomes an inquiry of some interest as to what angle of impact has been found best in those screw propellers which have given the best results in practical work. Scientific American Supplement, No. 460, October 25, 1884 Appreciating the new idea, he had the engines of the new ship changed and a screw propeller introduced. Sinking of the Titanic and Great Sea Disasters On either side of the car screw propellers were fitted to be worked by hand. British Airships, Past, Present, and Future A screw propeller working under load approaches more closely to its maximum efficiency as it carries its load with a minimum amount of slip, or nearing its calculated pitch speed. Flying Machines: construction and operation; a practical book which shows, in illustrations, working plans and text, how to build and navigate the modern airship He took out a patent, which included a rotatory steam-engine, and a mode of propelling vessels by means either of a paddle-wheel or a "screw propeller." Men of Invention and Industry The remarkable pencil sketch to which I have referred, is that of a screw propeller, drawn by my father, dated 1819. James Nasmyth: Engineer; an autobiography The screw propeller was driven by eight labourers, a steam-engine being deemed too dangerous; but it was estimated that had one been used, weighing as much as the men, the speed would have been doubled. The Project Gutenberg Encyclopedia Volume 1 of 28 These three types may be said to embrace all the engines now being manufactured in this country for the propulsion of steam vessels by the screw propeller. Scientific American Supplement, No. 299, September 24, 1881 As a true pitch screw propeller is virtually a rotating aeroplane, a curved surface may be advantageously employed when the limit of size prevents using large plane surfaces for the blades. Flying Machines: construction and operation; a practical book which shows, in illustrations, working plans and text, how to build and navigate the modern airship It will be observed, from what has been said, that the idea of a screw propeller is a very old one. Men of Invention and Industry Q.--In well formed screw propellers what is the amount of slip found to be? A Catechism of the Steam Engine He patented the boomerang screw propeller, and was the author of many educational and other works, including a translation of the Lusiad of Camoens. The Explorers of Australia and their Life-work The screw propeller is still to a great extent an unsolved problem. Scientific American Supplement, No. 299, September 24, 1881 Pitch speed.—The term "pitch speed" of a screw propeller is the speed in feet multiplied by the number of revolutions it is caused to make in one minute of time. Flying Machines: construction and operation; a practical book which shows, in illustrations, working plans and text, how to build and navigate the modern airship And that this was the case with the practical introducer of the screw propeller will be obvious from the following statement. Men of Invention and Industry Q.--Is the screw propeller as effectual an instrument of propulsion as the radial or feathering paddle? A Catechism of the Steam Engine He was the inventor of the first practical screw propeller for steamboats, and by his invention of the revolving turret for war vessels he completely changed naval architecture. A Brief History of the United States The screw propeller 'Superior,' with New York mails of the 15th, has reached Queenstown. Self-Raised Or, From the Depths Instead of the screw propeller which characterized earth's aircraft, these vessels employed the true bird principle, combining it with the simple methods of primitive sailing craft. The Devolutionist and the Emancipatrix Some years before—indeed, about the time that Smith took out his patent—Captain Ericsson, the Swede, invented a screw propeller. Men of Invention and Industry A.--The ordinary form of screw propeller is represented in figs. A Catechism of the Steam Engine The screw propeller of the Edison and Sim's torpedo is also driven by an electric motor. The Story of Electricity She was a screw propeller of eight hundred tons, a fast sailer, and the very vessel that had been sent out to the polar regions, to revictual the last expedition of Sir James Ross. Five Weeks in a Balloon Two years later Fitch ran a veritable screw propeller on Collect Pond near New York City. The Paths of Inland Commerce; a chronicle of trail, road, and waterway He had, like many others, invented a screw propeller. Men of Invention and Industry The original screw propellers were made with several convolutions of screw, but it was found advantageous to shorten them, until they are now only made one-sixth of a convolution in length. A Catechism of the Steam Engine Waves of sound passing through the water from the screw propeller of the torpedo, or, indeed, any ship, make and break the sensitive contact, and ring the bell or light the lamp. The Story of Electricity The wing, both when at rest and when in motion," Pettigrew declared, "may not inaptly be compared to the blade of an ordinary screw propeller as employed in navigation. The Age of Invention : a chronicle of mechanical conquest It is not alone Fitch's development of the devices of the endless chain, paddle wheel, and screw propeller and of his puzzling earth-and-water creature that gives luster to his name. The Paths of Inland Commerce; a chronicle of trail, road, and waterway Q.--Do you consider that the screw propeller is best adapted for vessels of full power, or for vessels with auxiliary power? A Catechism of the Steam Engine Q.--Will you describe more in detail than you have yet done, the configuration and mode of action of the screw propeller? A Catechism of the Steam Engine Q.--What is the diameter and pitch of the screw propeller? A Catechism of the Steam Engine They had decided on two screw propellers rotating in opposite directions on the principle of wings in flight; but the proper diameter, pitch, and area of blade were not easily arrived at. The Age of Invention : a chronicle of mechanical conquest Thrust of the screw propeller, modes of receiving. A Catechism of the Steam Engine |
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