Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 263
ing one stroke is represented by the area ahc,which area is equal also to the rectangle afgc. If area liibm = AE,then AE -f- E is called the coeflicient of fluctuation of energy. For multiple-crank engines the turning-eftbrt curves for theseparate cranks are combined (Fig- 288), and the coefficient… … To find the value in foot-pounds of the area efg, obtain l^y means ofa planimeter, or by simple measurement to any scale, the ratio of thearea efg to the area ahcd. Then, since the area of (ibcd is known,being equal to the work in foot-pounds done by the steam upon thepiston or combined pistons…
Steam-engines
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