International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 381
quare inches, and whose altitude must be — = — of an inch; that is, a move- ne* jgs, ment of 10 inches of the piston a will cause a movement of^ of an inch of the piston d. Here is the old principle of machines: The power multi-plied by the distance through which it moves equals the… … 370 HYDROMECHANICS. Another familiar fact is also recognized, for the velocityratio of P to W is lo : |, or 40. Since in any machine theweight equals the power multiplied by the velocity ratio, W= PX 40, and when P— 1 pound, \V= 40 pounds. 9S2. This principle is made use of in the hydraulicpress…
Railroad engineering
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