. Locomotive engineering : a practical journal of railway motive power and rolling stock . e pump,governor, etc. The figure 53 marks theparticular part of the pump, governor,etc. Thus piston 53. F-8 governor, meansthe piston 53 in plate 8, catalog F. {78) T. B. OG., Bloomington, III.,asks: Why is the feed port in a freight triplevalve, quick action, smaller than that of apassenger valve? A.—Longer freighttrains than passenger trains are hauled. first put on, it worked all right, but in afew weeks it would jar the whole enginewhile making its upward stroke. In clos-ing off steam valve, just so
. Locomotive engineering : a practical journal of railway motive power and rolling stock . e pump,governor, etc. The figure 53 marks theparticular part of the pump, governor,etc. Thus piston 53. F-8 governor, meansthe piston 53 in plate 8, catalog F. {78) T. B. OG., Bloomington, III.,asks: Why is the feed port in a freight triplevalve, quick action, smaller than that of apassenger valve? A.—Longer freighttrains than passenger trains are hauled. first put on, it worked all right, but in afew weeks it would jar the whole enginewhile making its upward stroke. In clos-ing off steam valve, just so pump wouldkeep up required pressure, it would hard-ly ever jar any; and when it did, would bevery light. We work straight air, andcarry a pressure of 40 pounds. A.—Thegovernor is evidently not you regulate the pump by thethrottle, the pressure is kept below thatpressure which controls the governor, andreally prevents it from acting as a gover-nor. Your trouble would probably belessened by easing off the dififerentialpiston. (80) A. R. N., Cleveland, O., writes:. BOILER ROOM OF THE N. V., N. H. & H. NEW AIR BRAKE INSTRUCTION C.\R. pressure, while on the road 70 poundsonly are used? A.—The piston travel islonger on a car when running than whenstanding still. If set at 7 inches standingtravel, the piston will be 8 or more whenmaking a stop. By testing with 90 inyards, a nearer approach to the condi-tions of the true or,running travel is had;hence the 90 pounds test. See slack ad-juster paper in .Air-Brake Association(1898) Proceedings. (77) P. Lawrence. Mass., writes:In February number H. I. G. asks:Why is the piston .S3 in the F-8 governormade wider than the one used in the old-style D-9? Please e-xplain the meaningof these letters and luimhcrs. ami where and air sent back into the train pipe fromthe main reservoir must first move all thetriple pistons to release position beforethe charging of begins. Onpassenger trains there are but fe
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