Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 315
be necessary to multiply each mass in column (3) and eachmass moment in column (5) by its respective crank radius; but inordinary engines the crank radius is the same throughout, and theproportional result is not affected. First, draw the polygon of mass moments about the origin in the 298… … Fig. 356. First, for crank 4, draw AB horizontal = 3000 X 7 = 21,000 to any convenient scale of units ; For crank 3, draw BC = 4500 x 5 = 22,500For crank 2, draw CA = 3000 x 3 = 9O0O These lines form a closed triangle of mass-moments, and the cranksare in balance if made parallel to the lines AB,…
Steam-engines
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