Hutton, Frederick Remsen, 1853-1918 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 223
e hollow lacks to enable it to meet the inner edgeof the port is called exhaust clearance or inside clearance ornegative exhaust-lap. Its use is restricted to high-speedengines and to those in which the expansion by means of lapis not carried very far. The difficulty would be from the tooearly… … Fig. 131. 90. Lead in the Slide-valve—It is often considereddesirable to have the valve partly open before the pistonreaches its dead-centre, in order to bring full boiler-pressureon the piston at the beginning of its stroke. In other words,to have the valve lead the piston. The definition of lead…
Mechanical engineering · Steam power plants
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