. Locomotive engineering : a practical journal of railway motive power and rolling stock . down tc-ni|Kraliirc. That is, when the barometershows the air to be denser, then less workwould be required to pump up to 70pounds; but the variation of the barom-eter is so slight that it would not notice-ably affect this case. When the atmos-phere contains much moisture, such as atrainy and foggy seasons, the capacity ofthe main reservoir will be reduced, unlessfrequent drainage is practiced.(43) G. C., Norfolk, Va., writes:On page 64 the Westinghouse instruc-tion book says: It is sometimes im- the unk
. Locomotive engineering : a practical journal of railway motive power and rolling stock . down tc-ni|Kraliirc. That is, when the barometershows the air to be denser, then less workwould be required to pump up to 70pounds; but the variation of the barom-eter is so slight that it would not notice-ably affect this case. When the atmos-phere contains much moisture, such as atrainy and foggy seasons, the capacity ofthe main reservoir will be reduced, unlessfrequent drainage is practiced.(43) G. C., Norfolk, Va., writes:On page 64 the Westinghouse instruc-tion book says: It is sometimes im- the unknown distance for any speed,everything being in good order? Yousaid in LfjcoMOTivE recentlythat a train at 60 miles per hour could beslopped in 1,100 feet. By this rule I canonly get 918 feet, a slight difference of182 feet. Please set me right. A.—Everything else being equal meansvirtually that the same train must beused. If, on a certain train, running 20miles an hour, a stop can be made in 102feet, the distance required in which tostop this train from any speed may be. AIR-BR.\KE INSTRUCTION C.\R RECENTLY BUILT BY THE L.\KE ERIE & WESTERN ^Y. pretty low, and I have noticed that in thatkind of weather the pump has to do morework to get the same pressure in releasing brakes, even after a moderateapplication, the main reservoir pressurewill drop perhaps to 60 pounds. Duringthe winter in this country the atmosphereis very heavily charged with watervapor, and that may have something, or•even all, to do with it. I speak of trains,such as are run here in passenger service,of five, six and seven cars. A.—Thesame amount of work is required when agiven amount of air is pumped and usedat 30 degrees below zero as when pumpedand used at 30 degrees above zero. Thebarometric condition of the atmospherevould have more to do with the case than portant to know the distance in which atrain should be stopped at a greater orlesser speed, all other things being
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
