. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ake it would be betterwith a long train of all air-braked cars,to stop, holding on the brakes, and to 115. Explain the principle 01 the du-plex governor applied to freight en-gines. .\.—Tlie liigli pressure head ui governor is connected direct tothe main reservoir pressure and is usu-ally set for 110 pounds. The low pres-sure head is connected to port f in thebrake valve and is set at 90 the brake valve handle is in fullrelease position or running position,the low press
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . ake it would be betterwith a long train of all air-braked cars,to stop, holding on the brakes, and to 115. Explain the principle 01 the du-plex governor applied to freight en-gines. .\.—Tlie liigli pressure head ui governor is connected direct tothe main reservoir pressure and is usu-ally set for 110 pounds. The low pres-sure head is connected to port f in thebrake valve and is set at 90 the brake valve handle is in fullrelease position or running position,the low pressure head is operative, butwhen placed on lap. there being no mainreservoir pressure in port f. the highpressure head must govern, thus per-iiiilting tlic pump to compress air dur-ing the time the brake valve handle ison lap while making a brake applica-tion. 116. -Are the results from shocks onpassenger trains likely to be expensiveand give the road a bad reputation? A.—Yes. 117. Do you understand the import-ance of watching the air gauge closely? .\.—Yes. I [8. When descending a grade, liow. SWISS PASSENGER IA)COMOTIVE. cut ofif the engine while taking coal andwater, as considerable time and dam-age will be saved by this method. 111. Do you think it poor policj toreverse the engine while the driverbrakes are applied? A.—Yes, tests have proven this. 112. Should the train pipe be blownout before leaving the engine house? A.—Yes, as cinders or sparks are like-ly to be gathered in the coupling heador hose. 113. Are the brakes any more liableto stick after an emergency applicationthan after a service? A.—Yes, as dirt in the train linemight work between the emergencyvalve and its seat, permitting train pipepressure to pass to the braKe cylinder. 114. If, in making a service applica-tion, you notice some wheels slide, doyou think it good policy to drop sandto start them turning again? A,—No, a wheel once stopped cannotbe started to turning again by sanddropped on the ra
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