. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . tests was information which would leadto the perfection of an efficient brake formodern passenger trains, and it was un- derstood that this could not be accom-plished by air-operated devices alone, asbrake shoe performance can vary thelength of a stop as much as 20 per more under present-day conditions. The engineers in charge of the testsrealized that the four most importantfactors bearing upon the length of a trainstop were: brake cylinder pressure ob-tained, time in which it is dev
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . tests was information which would leadto the perfection of an efficient brake formodern passenger trains, and it was un- derstood that this could not be accom-plished by air-operated devices alone, asbrake shoe performance can vary thelength of a stop as much as 20 per more under present-day conditions. The engineers in charge of the testsrealized that the four most importantfactors bearing upon the length of a trainstop were: brake cylinder pressure ob-tained, time in which it is developed,brake rigging or foundation brake gearefficiency and the average co-efficient of struction heavy steel passenger cars, todefine the proper air brake equipmentfor passenger cars weighing 130,000 over. The committee met the railroad repre-sentatives at Pittsburgh. Pa. Mr. Gibbs, general superintendent motivepower, Pennsylvania Railroad, was electedchairman, and Mr. A. L. Humphrey, gen-eral manager of the Westinghouse AirBrake Company, was asked to explain theobject of the 1559—\ I \\ YORK DUPLEX COMPRESSOR. LOW PRESSURE PISTON ON UP STROKE. brake shoe friction; hence the standardas well as several types of clasp brakewere tested, plain, slotted and flangedbrake shoes of various composition wereused, and the P. M., U. C. and the electro-pneumatic brake equipments were testedout. It has been some time since we havementioned the Toledo tests of 1909, andat that time it will be remembered that acommittee of the Master Car BuildersAssociation was called upon by repre-sentatives of several of the largest East-ern railroads, which had in course of con- Mr. Humphrey outlined the propositionconfronting the air brake company, whichwas to furnish a brake equipment for carsweighing from 140,000 to lbs. andwhich had outgrown the foundation brakerigging of that day, and pointed out thata radically new design of rigging wasimperative, and further stated th
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
