Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 309
same as curve A, and is set 90° ahead of it. The dotted lineR gives the resultant vertical forces of the combined cranks on thefoundation, and is shown in this case to be considerable. If the weightof the moving parts of engine B were greater than those of engineA, then the maximum vertical forces… … are much to be preferred to two cranks at 90° and pistons of unequal weight. Witli the for-mer arrangement, how-ever, it is necessary toincrease somewhat thediameter of the crank-shaft to secure sufficientstrength (see Fig. 268).AVith cranks at 90°, it isspecially important thatthe range of…
Steam-engines
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