. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . lide valve or its seat, or else jerkedinto release because of the friction of theparts. (192) J. I. M., Rensselaer, N. Y.,writes: In talkiuK with an engineer he made would stay apart. Please explain. A.—With two trains, one with a locomotiveand five passenger coaches, and anotherwith the same engine and ten coaches,precisely the same in condition, such asweight, braking power, brake shoes, etc.,the longer train could be stopped in ashorter distance than the shorter train, thereason being that
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . lide valve or its seat, or else jerkedinto release because of the friction of theparts. (192) J. I. M., Rensselaer, N. Y.,writes: In talkiuK with an engineer he made would stay apart. Please explain. A.—With two trains, one with a locomotiveand five passenger coaches, and anotherwith the same engine and ten coaches,precisely the same in condition, such asweight, braking power, brake shoes, etc.,the longer train could be stopped in ashorter distance than the shorter train, thereason being that the coaches are brakedto 90 per cent, of their light weight, andthe engine is not braked so high. Usuallythe tender is braked to 90 per cent, of itslight weight, the brake on the drivingwheels to about 75 per cent, and the for-ward truck brake (if any) is braked toabout 50 or 60 per cent. This leaves agreater percentage of unbraked power onthe engine than it does on the cars. Thispercentage of unbraked weight of the en-gine must be held back by the brakes onthe cars. Ten cars can hold back more. KlG. •,>.—TRIPLE VALVE TESTING UEVICE, GREEN ISL.^ND SHOPS. DEL.\WARE &HUDSON RAILROAD.—COURTESY OF- A. BUCHANAN. MASTER MECHANIC. the statement that he could stop a pas-senger train of four cars quicker thanhe could ten cars, running 50 miles anhour, everything else being equal (eachcoach weighing same, brakes being in first-class condition. quick-acting valvesand cylinders alike). I claimed thereshould be no difference, with this excep-tion, that the engine had more brakingpower in proportion to its weight than acoach, and the excess would be greateron our cars than ten, but he claimedthat was not where the difference was,but said it was the weight of the asked him if it was possible to couplefour or ten coaches together, 4 , with a chain and have themthat distance apart when the brakewas applied? Would the rear coachescome together and shove the forw
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
