 | Jay Brownlee Davidson, Leon Wilson Chase - Agricultural machinery - 1908 - 538 pages
...indicated horse power is called the mechanical efficiency of the engine. If P = Mean effective pressure, L= Length of stroke in feet, A = Area of piston in square inches, N = Number of working strokes a minute, It is to be noted that in double-acting engines the faces of the piston on... | |
 | International Correspondence Schools - Steam-boilers - 1908 - 740 pages
...is in which IHP = indicated horsepower; P = mean effective pressure, in pounds per square inch; L = length of stroke, in feet; A = area of piston, in square inches; N = number of revolutions per minute. The area of the piston or cylinder may be found by transforming formula 1;... | |
 | Charles Lincoln Hubbard - Heating - 1909 - 206 pages
...33,000 in which P = mean effective pressure in pounds per square inch acting on the piston (MEP). L = length of stroke in feet. A = area of piston in square inches . N = number of single strokes per minute. By substituting 12 for P in this formula, it will give the horse power gained... | |
 | Thomas Fleming Day - Shipbuilding - 1907 - 454 pages
...33,000 Where P — Mean effective pressure per square inch on the piston during working strokes. L— Length of stroke in feet. A — Area of piston in square inches. N — Number of impulses per minute. This equals revolutions times number of cylinders for two-stroke engines, and... | |
 | John Charles Stone - Business mathematics - 1908 - 266 pages
...formula HP = ^ ^ Q nnn , where jo= the mean effective oo, pressure in pounds per square inch, I = the length of stroke in feet, a = area of piston in square inches, n = twice the number of revolutions. Compute the HP of an engine in which a test showed p to be 35 Ib.... | |
 | Charles Henry Benjamin - Steam-engines - 1909 - 336 pages
...engine is found from the formula _PLAN P" ~ 33,000 where P = mean pressure on square inch of piston. L = length of stroke in feet. A = area of piston in square inches. N = number of strokes per minute. It is evident that the numerator gives the work done in ft. Ib. per min. Brake Horse Power is the power... | |
 | American Gas Institute - Gas - 1909 - 1162 pages
...formula ; HP = \^^ in which p = Mean effective pressure of the steam in pounds per square inch. L = Length of stroke in feet. A = Area of piston in square inches. x = Number of revolutions per minute. The mean effective pressure may be determined exactly by the... | |
 | Mechanical engineering - 1910 - 938 pages
...edition. + See MACHINERY'S Reference Series No. 53, Use of Logarithms and Logarlthrale Tables. L = length of stroke In feet, A — area of piston In square inches, N = number of strokes of piston per minute. 20 In the given problem P — 110; L (In feet) = — =12/3; A., the area 12 of... | |
 | T. Campbell Futers - Coal mines and mining - 1910 - 380 pages
...IHI . --- 33j000 P == the moan pressure acting on the piston as measured on an indicator diagram, L = length of stroke in feet, A = area of piston in square inches, N = number of revolutions per minute, and the " brake " horse-power is the actual power given at the crank shaft... | |
 | 1910 - 518 pages
...horsepower of engine, P = mean effective pressure on piston in pounds per square inch, L = length of piston stroke in feet, A = area of piston in square inches, N = number of strokes of piston per minute. Assume that P = 120, L = 2, A = 320 and N = 160; what would be the horsepower?... | |
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L = length of stroke in feet. A = area of piston in square inches. n = number of strokes per minute (rpm X 2). 
