Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 330
through the origin O of the diagram; that is to say, in atheoretical engine there is zero steam-consumption at zero meanpressure. But in practice that is notthe case, and if the obliqueline drawn from an actualengine test be produced, itwill be found not to passthrough the origin 0, but tocut the… … HORSE POWER Fig. 367. cc - W = a + ^P where W is the total weightof steam used per hour; P is the indicated horse-power ; a is theweight of steam used at zero mean pressure, and depends upon theextent of the back pressure and on the losses inherently due tothe engine itself while running; 6 is a…
Steam-engines
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