. Railway mechanical engineer . phere. By reversing the valve gear the cylinders draw inthe air which is compressed, the discharge being madethrough a small pipe leading to a small perforated cham-ber at the top of the stack. In order to counteract the heatproduced by compression, water is sprayed in the exhaustpassages of the cylinders, the resulting mixture being driventhrough the superheater into the header passing out throughthe discharge pipe mentioned above. By regulating the valvewhich controls the discharge of the compressed air the loco-motive engineer is able to regulate the speed of
. Railway mechanical engineer . phere. By reversing the valve gear the cylinders draw inthe air which is compressed, the discharge being madethrough a small pipe leading to a small perforated cham-ber at the top of the stack. In order to counteract the heatproduced by compression, water is sprayed in the exhaustpassages of the cylinders, the resulting mixture being driventhrough the superheater into the header passing out throughthe discharge pipe mentioned above. By regulating the valvewhich controls the discharge of the compressed air the loco-motive engineer is able to regulate the speed of the is the ordinary way of braking a descending train undernormal conditions. Brake shoes are provided on the second, third and fourthpairs of driving wheels and are operated either by twovacuum cylinders or by hand from the firemans side of thecab. In addition to this there is a powerful band brakeacting on the crank pin disc of the rack engine. This con-sists of steel bands lined with lirass blocks that fit into a. Fig. 4^—Doiible-Acting Caille-Potonie Feedwater Pump series of grooves cut into the circumference of the discs andare worked by a screw. The Caille-Potonie feedwater heater and feedwater pumpform an important addition to three of these engines asalready mentioned. The feedwater heater is shown in , and the double acting feedwater pump shown in Fig. heater consists of 264 tubes of between ps in. and ^ diameter. These tubes pass through the water chamberand have a heating surface of sq. m. (116 sq. ft.).The steam required for this heater is taken from the exhaustof the cylinders and admitted to the heater through a regu-lating valve. Fig. 5 shows the cab arrangement of the 0-10-0 locomo-tive. The firebox is fitted with the F. Marcotty smoke con- suming device. There are two water gage glasses of theKlinger type, two injectors of the Friedmann pattern No. 7and an Hausshalter speed recorder. The cab is well arrangedand has a ventilat
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
