. Railway master mechanic . mediate receiver, and the engine then works likean ordinary locomotive. The diagram of distribution Fig. V) permits thevarious phases of the work to bo examined. Theelliptical curve has been drawn in the ordinary man-ner to show the movement of the valve. It shows theposition of the edge of the port, the ordinates indi-cating the actual movements relatively to its originalposition and the abscissas being on a scale of 1-7 ofthe corresponding displacement of the piston. This On account of this tractive power and its adhesiveweight, the locomotive may be compared with
. Railway master mechanic . mediate receiver, and the engine then works likean ordinary locomotive. The diagram of distribution Fig. V) permits thevarious phases of the work to bo examined. Theelliptical curve has been drawn in the ordinary man-ner to show the movement of the valve. It shows theposition of the edge of the port, the ordinates indi-cating the actual movements relatively to its originalposition and the abscissas being on a scale of 1-7 ofthe corresponding displacement of the piston. This On account of this tractive power and its adhesiveweight, the locomotive may be compared with thelocomotives having eight wheels coupled on thesame road. On the other hand, from the diameterof its driving is 65 inches, it is adaptedto haul passenger trains at a moderate speed. Infact it has been worked in both services. To determine the power of the engine, a heavytrain of 628 gross tons was hauled at the averagespeed of freight trains. It was ablegrade of * of 1 per cent, at an even speed of 12* miles. CURVE OF DISTRIBUTION HIGH PRESSURE CYLINDERPOUND LOCOMOTIVE. [Actual displacement of valve 1-7 of piston motion. The diagram gives tv?o sets of lines for thethe greatest inclination are for an increased stroke.] curve gives the extent of the points of distributionin addition to that of admission. The cut-off valve being at an opposite point in itsstroke to that of the piston, its motion would beshown by a straight line were it not for the obliquityof the connecting rods. This obliquity has beentaken into account in drawing the curves whose dis-tance from that of the main valve, measured in thedirection of the ordinates, gives, for any position ofthe piston, the distance between the position of thecut-off valve and the edge of the valve which itmust meet to cut off the steam admission. This lat-ter point is shown by the intersection of the two THREE CYLINDER COM- t-off; those with For backing, the valve must necessarily be placedin the transverse position,
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Keywords: ., bookcentury1800, bookdecade1870, bookidr, booksubjectrailroadcars
