 | American School (Chicago, Ill.) - Engineering - 1903 - 494 pages
...multiplied by volume. Let P -- pressure on the piston in pounds per square foot. p = pressure on the piston in pounds per square inch. A = area of piston in square inches. L = length of stroke in feet. V = volume swept by piston in one stroke in cubic feet. W = work done in foot-pounds. Then from the... | |
 | National Electric Light Association. Convention - Electric lighting - 1904 - 670 pages
...piston. 33,000 — conventional number of foot-pounds in one horse-power. EW LLOYD. Let P represent the mep in pounds per square inch. " A " " area of piston in square inches. " L " " length of the stroke in feet. " N " " number of strokes per minute. Then the work done per minure — PLAN foot-pounds.... | |
 | William Henry Booth - Feed-water purification - 1906 - 406 pages
...calculation is as follows : — Let P = The mean effective pressure of steam or water in pounds on the square inch. A = Area of piston in square inches....stroke in feet. N = Number of strokes per minute, in double-acting engines or pumps = revs. x 2. Then P x A = the total mean effective pressure on the... | |
 | Electrical engineering - 1906 - 568 pages
...by volume. Let P == pressure on the piston in pounds per .square foot. ' p = pressure on the piston in pounds per square inch. A =: area of piston in square inches. L = length of stroke in feet. V = volume swept by piston in one stroke in cubic feet. W = work done in foot-pounds. Then from the... | |
 | American School (Chicago, Ill.) - Engineering - 1906 - 568 pages
...equal to the length of stroke multiplied by the number of strokes. Let P = mean effective pressure in pounds per square inch. A = area of piston in square inches. L = length of stroke in feet. X = number of strokes per minute. Then the work done per minute, W = PLA N. Since one horse-power is... | |
 | Gardner Dexter Hiscox - Steam engineering - 1906 - 504 pages
...the usual formula : PLAN where P = mean effective pressure in square inches ; A = area of cylinder in square inches; L = length of stroke in feet; N = number of strokes per minute. The mean effective pressure is obtained by multiplying the area of the card by the scale of the spring... | |
 | Marine engines - 1907 - 780 pages
...result will be the indicated horsepower of the engine. Let IHP = indicated horsepower of engine; P — MEP in pounds per square inch; A — area of piston...inches; L = length of stroke in feet ; N= number of working strokes per minute. Then, the above rule may be expressed thus: _PLAN IH-R- 33,000 ' In a double-acting... | |
 | Gardner Dexter Hiscox - Steam engineering - 1907 - 630 pages
...usual formula: PLAN -— , where P = mean effective pressure in square inches ; A = area of cylinder in square inches; L = length of stroke in feet; N = number of strokes per minute. The mean effective pressure is obtained by multiplying the area of the card by the scale of the spring... | |
 | John Duncan - Engines - 1907 - 492 pages
...it pm Ibs. per square inch, we have : Work done on piston per stroke=(jBmx^4 xL) ft.-Ibs. where .4= area of piston in square inches, L = length of stroke in feet. Let N= revolutions per minute, then 2N= number of strokes per minute ; .-. work done OH piston per... | |
 | Agriculture - 1908 - 664 pages
...through in a minute is the number of strokes in a minute multiplied by the length of stroke. Let P = MEP, in pounds per square inch; A = area of piston,...stroke, in feet; N = number of strokes, per minute. Then, the work done per minute is PLAN foot-pounds. One horsepower = 33,000 foot-pounds per minute.... | |
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MEP in pounds per square inch; A = area of piston in square inches; L = length of stroke in feet ; N= number of working strokes per minute. 
