Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 128
, isthe space between the inside edges of the exhaust archof the valve and the bridges when the valve standscentral. It means just the reverse of inside lap; that»<i, the distance between the inside edges of the exhaust ■nil Bvii Figure 55 arch is slightly greater than the distance between… … steam and to hasten compression. The amount ofinside lap is small, seldom exceeding }i of an inch,and for fast passenger engines it is better to havenone, as it causes the engine to be quicker. The pur-pose of inside clearance is exactly the opposite to thatof inside lap. It hastens release and…
Locomotives
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