Steam engines, prepared in the Extension division of the University of Wisconsin (1919)
Shealy, Edward Marvin · New York, McGraw-Hill · leaf 120
The weight registered on the scalesand the speed of the engine are observed at the same time. INDICATED AND BRAKE HORSEPOWER 105 The brake horsepower may now be calculated by the formula: 2TrlnW B.H.P. = 33,000 in which B.H.P. is the brake horsepowerI is the length from center of flywheel to… … Fig. 70. Example.—What is the brake horsepower of a steam engine running at210 r.p.m. when fitted with a Prony brake w^hich measures 8 feet fromcenter of the flywheel to the point of support at the end of the arm, thescale reading 742 lbs., the unbalanced weight of the brake being 13 lbs., andthe…
Steam-engines
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