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The Nautical Steam Engine Explained and Its Powers and Capabilities Described

The Nautical Steam Engine Explained and Its Powers and Capabilities Described


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1839 Excerpt: ... number of strokes per minute 20; the pressure of steam in the boiler 5lbs. per square inch, the vacuum in the condenser = to 13lbs. Twice the length of stroke, 5 ft. 9 in. = 11 feet 6 in. x 20 = 230, the velocity of the piston in feet per minute. Then to find the mean effective pressure on the surface of the piston. b + 13 = 18flbs. on each square inch, then, i 3117. 183 (area of piston) = 59'4411bs-total Pres" sure on piston per square inch. 59,4411bs. x '632 = 375651bs. effective pressure on the piston. 37565 x 230, the velocity of the piston per 8639720 minute in feet = o n(vQ = 261 the horse power of the engine. A most useful instrument, called an indicator, can be attached to the cylinder, which will point out the exact working state of the engine, how much of the steam is lost between the boiler and cylinder, and whether any difference exists between the vacuum in the condenser and cylinder. A small very portable instrument of this kind is made by Mr. Macknaught, of Glasgow, and no person who wishes to ascertain what his engine really is doing should be without one. The indicator consists of a small brass cylinder, in which works a piston, the motion of the piston is resisted by a spring calculated to move a tenth of an inch for each pound of pressure; the piston rod carries an index, and the front of the cylinder is graduated to 151bs. each way (for a low pressure engine). The end of the cylinder terminates in a brass tube, which will fit into the grease cock of the cylinder cover, and this tube is opened or closed at pleasure by a small cock. Attached to this cylinder is another small one, which is grooved round its edges so as to receive a piece of drawing paper, or card, a spring allows the cylinder to turn on its axis, so far as to ...


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Product Details
  • ISBN-13: 9781151619853
  • Publisher: General Books
  • Publisher Imprint: General Books
  • Height: 246 mm
  • No of Pages: 34
  • Spine Width: 2 mm
  • Width: 189 mm
  • ISBN-10: 115161985X
  • Publisher Date: 06 Feb 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 82 gr


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