 | Science - 1902 - 750 pages
...Plan -*-• n- L • — oVTn/wi' OOjOUU where p is the mean effective pressure, I is the length of stroke in feet, a is the area of the piston in square inches, and it is the number of strokes per minute. By substitution, we find the horsepower of both engines to... | |
 | Internal combustion engines - 1910 - 104 pages
...follows : 1. 2XPXLXAXN =HP 33,000 In which P represents the average force acting on the piston in pounds; L, is the length of the stroke in feet; A, is the area of the piston, and N is the number of revolutions of the engine per minute. The factor 2 is used to change revolutions... | |
 | James Gunn - Automobiles - 1910 - 280 pages
...is given by the formula TTTP _ 33,000 where P is the mean effective pressure in lbs. per square inch L is the length of the stroke in feet A is the area of the cylinder in square inches (if the engine has more than one cylinder, then the sum of the areas is taken)... | |
 | James Ambrose Moyer - Machinery - 1911 - 450 pages
...where p is the mean effective pressure in pounds per square inch measured from the indicator diagram, 1 is the length of the stroke in feet, a is the area...the piston in square inches, and n, is the number of explosions per minute, then BHP Mechanical Efficiency =^-W-5- • • • (*H>) lHi . Certain important... | |
 | James Ambrose Moyer - Machinery - 1911 - 448 pages
...where p is the mean effective pressure in pounds per square inch measured from the indicator diagram, 1 is the length of the stroke in feet, a is the area of the piston in square inches, and ne is the number of explosions per minute, then BHP Mechanical Efficiency = ' _ ' _ ' . . . (89) L.ti.,r.... | |
 | Robert A. McMillan - Marine engineering - 1912 - 378 pages
...— i where IHP is the indicated horse-power, P is the mean pressure of the steam in the cylinder, L is the length of the stroke in feet, A is the area of the piston in square inches, and X is the number of revolutions per minute, 33000 being the same in all calculations. If the denominator... | |
 | Elmer Ellsworth Burns, Joseph Gerald Branch - Engineering - 1912 - 150 pages
...stroke, in pounds per square inch. This average pressure must be determined from the indicator card. L is the length of the stroke in feet ; A is the area of the piston in square inches ; N is the number of strokes per minute. Q. How would you equalize clearance if the piston is keyed... | |
 | Texaco, inc - Petroleum as fuel - 1912 - 160 pages
...mean effective pressure (as shown by a steam engine indicator) per square inch, acting on the piston. L is the length of the stroke in feet. A is the area of the piston in sq. inches (area of the piston rod to be deducted for the crank end). 109 N is the number of working... | |
 | Cecil Hobart Peabody - Marine engines - 1913 - 228 pages
...mean-effective-pressure by the standard equation, LH .P. = where P is the mean-effective-pressure, L is the stroke in feet, A is the area of the piston in square inches and N is the number of revolutions per minute. Solving this equation for the meaneffective-pressure we have 33,0001.HP 2 LAN... | |
 | Robert A. McMillan - Marine engineering - 1913 - 360 pages
...then calculated from the formula — T IT P - P x L x A x E 33,000 where P is the mean pressure. L is the stroke in feet. A is the area of the piston in square inches. E is the number of explosions per minute. E is found by taking half the revolutions per minute, or... | |
| |
L is the length of the stroke in feet, A is the area of the piston in square inches, and N is the number of power strokes per minute. 
