. Electric railway journal . PNEUMATIC SAND CAR BUILT BY THE UNITED RAILWAYSOF ST. LOUIS be turned at any angle. Directly opposite this open-ing in the casting is a H-in. pipe leading to the com-pressed-air equipment. The compressed-air equipment consists of two typeDH-25 Westinghouse motor-driven compressors capableof delivering 25 cu. ft. of air per minute at 90 lb. pres-sure, and two 18-in. x 72-in. air reservoirs which are con-nected to the sand tank through a quick-opening compressors are located in the driving cab whichtakes up 7 ft. 6 in. of space at one end of th3 ca
. Electric railway journal . PNEUMATIC SAND CAR BUILT BY THE UNITED RAILWAYSOF ST. LOUIS be turned at any angle. Directly opposite this open-ing in the casting is a H-in. pipe leading to the com-pressed-air equipment. The compressed-air equipment consists of two typeDH-25 Westinghouse motor-driven compressors capableof delivering 25 cu. ft. of air per minute at 90 lb. pres-sure, and two 18-in. x 72-in. air reservoirs which are con-nected to the sand tank through a quick-opening compressors are located in the driving cab whichtakes up 7 ft. 6 in. of space at one end of th3 cab has a 30-in. sliding door in the rear end andis 7 ft. 3 in. high, giving a total height from top ofrail of 11 ft. 10| in. The air reservoirs are locatedbetween the cab and the tank. After having been in 4--4-P/y RubberSancJ, Pop Safety Mve y^Z^aTall^Hose Wire bound/Oty Coup/ing- aeSef of-60%. ^—°Pen,ncf Va/ve. ,«J|T ■» ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | -k /£ —h i k- - - - .-- -30------ - -- - - - >J DETAILS OP CONSTRUCTION OP PNEUMATIC SAND CAR an opening to which is riveted a T-shaped casting. A4-in. discharge pipe leads from one side of this cast-ing and extends vertically up the back of the tank andover the top by means of two large radius bends. Awire-bound rubber hose is attached to the free end ofthis pipe. There is a 4-in. gate valve at the end anda swivel joint between the bends so that the pipe may operation some time, it was found to be advantageousto install two additional air reservoirs of the same sizeand so arranged with check valves that a back pressureof 20 lb. is always upon the compressors. This is toprevent the compressors from racing when the pres-sure in the reservoirs is suddenly thrown into the sandtank. The rear end of the platform is surrounded by 246 Electric. Railway Journal Vol. 52, No. 6 a railing and is available for the transportation of me
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