Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 510
■ Again, the displacement of D from its central position due to the movement ofthe 90° crank is r„ sin 6 where rj is the radius of the 90^ crank. The displacement PRof R from its central position will be p^J-z sin 6- The displacement of V from f 1 f 11 T, VB GR . , ^ . ^ , -o VB GR Its central… … 1 (^V /^ The value of // is a maximum when = 0. /. differentiating and equating to zero— - A sin e + B cos 0 = 0 and tan 6 = —A /, angle of advance = 90-6° (see Fig. 483).The 180° crank is = A, and the 90 crank = B.. the equivalent eccentric = OE = Va- + Wfrom which it will also be seen (Fig. 484)…
Steam-engines
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