. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . tial Quick Action After a LishtService Application. It is a well-known fact that after youmake a light service application of thebrakes (Westinghouse) you can some-times get the emergency—you can as ageneral thing. Now, say you make a light service ap-plication and lap your valve, taking properconditions into consideration, such as yourauxiliary reservoir, and train line pres-sures were equal at 70 pounds, with an8-inch piston travel. Two-sevenths re- February, 1902. RAILWAY AND LOCOMOTIVE EN
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . tial Quick Action After a LishtService Application. It is a well-known fact that after youmake a light service application of thebrakes (Westinghouse) you can some-times get the emergency—you can as ageneral thing. Now, say you make a light service ap-plication and lap your valve, taking properconditions into consideration, such as yourauxiliary reservoir, and train line pres-sures were equal at 70 pounds, with an8-inch piston travel. Two-sevenths re- February, 1902. RAILWAY AND LOCOMOTIVE ENGINEERING 83 duction of this pressure gives you threeequals. Now, on a light service applica-tion, I will say 10 pounds, this will notequalize between your auxiliary and brakecylinder. It only equalizes between thetrain lino and after your train sure to actuate the quick-action valvesand overcome the opposition of the pres-sure already in the brake cylinder. Actualtests prove that partial emergency will fol-low a light service reduction on fifty carsas easily as on five or six.—Ed.]. AUTOMATIC AIR-PUMP DRAIX, SECTIONAL Aaluaj/ Locomi/ttve Enj/iTttcrino AND OUTSIDE VIEW OF VALVE CASE. line exhaust stops blowing (no defects inihe brave valve). As I said before, youlap your valve, then put it to or below what brake cylinder pressurecan you get this emergency application ofthe brakes? I understand the reason you cant getemergency or anything over a light ser-vice application is because the auxiliaryand brake cylinder have so nearly equal-ized on the previous application that theywould completely equalize at 50 poundswhen a following emergency applicationis made through the service or graduatingports in the triple slide valve. Am I right?This partial emergency of a light servicereduction may probably work on a fewcars, five or six. but reasons justify me inbelieving it will not work on a long airtrain, because there is a greater volumeof air to make y
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