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40 inches 64 inches added air-pump amount atmosphere beam body boiler bottom breadth centre chimney circle coal column common consequently constant crank cube cubic cylinder cylinder in inches depth determine diagram diameter divided divisor engine equal Example expansion expressed falling feet figure FIND THE PROPER follows foot force fraction given gives greater half heat horse-power horses hour inches diameter increased indicated iron length less logarithm manner mean measure minute motion moving multiplied nearly nominal obtained passing performed pipe piston pound pressure proper proper thickness proportion pump quantity quotient raised represented resistance result rule shillings ship side speed square feet square inch square root steam strength stroke subtract suppose surface taken temperature term tion tubes valve velocity vessel volume weight wheel whole
Page 211 - Constant of an engine is found by multiplying the area of the piston in square inches by the speed of the piston in feet per minute and dividing the product by 33,000. It is the power the engine would develop with one pound mean effective pressure. To find the horse-power of the engine, multiply the MEP of the diagram by this constant.