Steam engines, prepared in the Extension division of the University of Wisconsin (1919)
Shealy, Edward Marvin · New York, McGraw-Hill · leaf 111
volume is neglected. Whether the ratio of expansion is calculated by the exactmethod or the approximate method it is necessary to locate thepoint of cut-off on the indicator diagram. As the point of cut-off is not sharply defined on the indicator diagram it is ratherdifficult to locate the exact… … Fig. 64. The difficulty of locating the point of cut-off exactly on indica-tor diagrams has led to the use of the commercial cut-off in deter-mining the ratio of expansion. The commercial cut-off islocated by drawing a horizontal line on the diagram through themaximum admission pressure and…
Steam-engines
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