. Railway mechanical engineer . substantial web. For instance, it willbe better to have two 12-in., 40-lb. channels than two 15-in.,4n-lb. channels, as tests have shown that the former will■■tand a higher stress than the latter. Narrow Gage Steel Hopper Car Capacity of 40,000 Lb. Obtained on a Track Gage ofTwo Feet; for Carrying Mine Products in Burma BY FREDERICK C. COLEMAN ONE of the many interesting narrow-gage railways inIndia is that connecting the Burma railways at Nam-yao station with Bawdin, where are situated theBurma mines. This railway is 51 miles in length and is of2-ft. gage. The
. Railway mechanical engineer . substantial web. For instance, it willbe better to have two 12-in., 40-lb. channels than two 15-in.,4n-lb. channels, as tests have shown that the former will■■tand a higher stress than the latter. Narrow Gage Steel Hopper Car Capacity of 40,000 Lb. Obtained on a Track Gage ofTwo Feet; for Carrying Mine Products in Burma BY FREDERICK C. COLEMAN ONE of the many interesting narrow-gage railways inIndia is that connecting the Burma railways at Nam-yao station with Bawdin, where are situated theBurma mines. This railway is 51 miles in length and is of2-ft. gage. The ruling gradient is 4 per cent, the minimumcurvature is of 90-ft. radius, and flat-bottomed rails weigh- and a concentrating mill and an electric power installationare also in course of completion. The trains are worked under a despatching system, andwith night running the railway is now handling 900 to 1,000(long) tons of traffic daily. Arrangements are in hand toincrease this capacity to 2,000 tons daily. This considerable. A 24-ln. Gage Steel Hopper Car for Service In Burma ing 41 lb, to the yard are used. The principal outwardtraffic consists of lead, silver, zinc ore,—the product of themines,—and lead bullion, whilst the inward traffic consistsof machinery and general stores for the mines, including6,000 to 7,000 tons of coke per annum for use at the minesmelters. At Namtu, the headquarters of the Burma MinesConipanv. is a large lead smelting and silver refining plant. development of traffic has called for the introduction ofmore powerful locomotives and larger freight cars, and anumber of all-steel double-hopper self-discharging cars of40,000 lb. to 44,000 lb. capacity were ordered in GreatBritain and are now in successful operation. These cars,supplied by F. R. Rand & Company, Limited, of West-minster, were liuilt by the Blake Boiler, Wagon & Engineer- Dfcember, 1917 RAILWAY MECHANICAL ENGINEER 693
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