. Comparative tests of Illinois Central Railroad locomotives No. 920 and No. 940 . Flo. 2., 9. rie. 10 the piston and cylinder head, from percent to percent as a| maximum reduction between the 920 and 940, and from to as a minimum reduction, with an average reduction of ,taking into account both head and crank end clearance. Theso ] clearances were actually determined for each engine by filling theclearance space with water, and getting the weight of water volume of the cylinders being known the clearance volume wascalculated in percent of
. Comparative tests of Illinois Central Railroad locomotives No. 920 and No. 940 . Flo. 2., 9. rie. 10 the piston and cylinder head, from percent to percent as a| maximum reduction between the 920 and 940, and from to as a minimum reduction, with an average reduction of ,taking into account both head and crank end clearance. Theso ] clearances were actually determined for each engine by filling theclearance space with water, and getting the weight of water volume of the cylinders being known the clearance volume wascalculated in percent of this volume. Figure 2, Plate II, andFigure 1, Plate III. See table II of Engine and Boiler Data. Inthe wall between the cylinder port and the exhaust passage, just be-low the inner side of the valves, there are openings 5-1/2 inches indiameter which are bushed and fitted with valves. Figure 2, PlateIII. These compression controlling valves, as they are called, aresimple piston valves with wide rings, and are carried in bushings Ipressed into place and fastened in the opening. They are gui
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