Mechanical laboratory methods; a testing of instruments and machines in the mechanical engineering laboratory and in practice (1918)
Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 378
obtained. The Ideal Mechanical Advantage is the ratio of a dis-tance moved through by the driving chain to the correspond-ing distance moved through by the following chain. Refer-ring to Fig. 112, representing a hoist diagrammatically, thisratio is D/d. If there were no friction, this would be… … The efficiency of a hoist equals the work done in hftingthe weight through any distance divided by the work done bythe applied force acting through the correspondingdistance. If the efficiency of a hoist is more than 50 percent, the weight lifted will return by gravity whenthe hoisting force is…
Mechanical engineering laboratories
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