The steam engine and turbine; a text-book for engineering colleges (1911)
Heck, Robert Culbertson Hays, 1870- · New York, D. Van Nostrand company · leaf 412
57. In Fig. 257 I, with a negative lap equal to half of rv, the valvecircle is located for cut-off at 0.1, at 0.3, and at 0.5 of the stroke: andat II is given a diagram showing how the center E2 of the expansioneccentric will have to be rotated about Ei in order to secure this effect.It is a simple… … Fig. 257. — Rotating the Virtual Eccentric. and it is apparent that the eccentric must be rotated by the governorthrough an angle equal to the crank angle between earliest and latestcut-off. The scheme of Fig. 257 is the simplest case of varying the virtualeccentric, with the advantage that the…
Steam-engines · Steam-turbines
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