. Building and repairing railways . Fig. 176. WATER TANK, SUPPORTED BY WOODEN POSTS OR BENTS. however, less delay to the trains is secured byusing two, as stated in the chapter on construc-tion. An automatic water column or stand pipe isillustrated by Fig. 179. There are several makeson the market. To secure satisfactory servicethe supply pipe should be large, some roads usinga 12 inch supply pipe for a 10 inch water must be a sufficient head of water to givethe necessary force to discharge the water rapidlyand not detain trains. The column must havea quick opening valve, be readi
. Building and repairing railways . Fig. 176. WATER TANK, SUPPORTED BY WOODEN POSTS OR BENTS. however, less delay to the trains is secured byusing two, as stated in the chapter on construc-tion. An automatic water column or stand pipe isillustrated by Fig. 179. There are several makeson the market. To secure satisfactory servicethe supply pipe should be large, some roads usinga 12 inch supply pipe for a 10 inch water must be a sufficient head of water to givethe necessary force to discharge the water rapidlyand not detain trains. The column must havea quick opening valve, be readily adapted to highor low pressure, be frost proof, should turn auto-matically to its position parallel with the track, STANDARDS OF CONSTRUCTION, 265. Pig. 171). Ni) PIPE OB WATER COLUMN. &66 BUILDING AND REPAIRING RAILWAYS. the valve should be balanced, it should rotateeasily and should drain automatically after use.*To enable fast trains to take water withoutmaking a stop Track Tanks are resorted to;they consist of a shallow tank 6 to 7 inches deepin the clear and 1200 to 1400 feet long. Theapproach at each end is sloped so that loose rodson passing trains will not catch and damage thetank. The train can take water when movingat a speed of 45 miles per hour; this is done bylowering a scoop attached to the tender, which,with the force and velocity at which the train ismoving, causes the water to flow into the tender,the tank is sloped up at the ends to preventthe scoop damaging it. Track tanks are soplaced that water can be taken about every 30miles run by the train. The difficulty met with
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
