. Railway mechanical engineer . terchangeable with those used with other classesof engines on the same railway. The first eight-coupled engine in Britain for main lineservice was built at Crewe in 1892 by the late F. W. Webb,for working heavy coal trains on the London & North West-ern. This engine had inside cylinders lJj in. by 24 in.,coupln 1 wheels 4 ft. 5 in. diameter, and had a boiler carrying high-pressure cylinders were 16 in. by 24 in. and the twolow-pressurs cylinders placed between the frames werein. by 24 in. Piston slide valves were introduced todistribute the steam in the high-pre
. Railway mechanical engineer . terchangeable with those used with other classesof engines on the same railway. The first eight-coupled engine in Britain for main lineservice was built at Crewe in 1892 by the late F. W. Webb,for working heavy coal trains on the London & North West-ern. This engine had inside cylinders lJj in. by 24 in.,coupln 1 wheels 4 ft. 5 in. diameter, and had a boiler carrying high-pressure cylinders were 16 in. by 24 in. and the twolow-pressurs cylinders placed between the frames werein. by 24 in. Piston slide valves were introduced todistribute the steam in the high-pressure cylinders and Joyvalve motion applied to the inside .mar worked the flat valvesof the low-pressure cylinders direct and the high-pressurevalves through rocking levers, two sets of valve gear thusoperating the four valve-. Adjacent cranks on each side ofthe engine were on opposite centers, each pair being at 90deg. The weight of the engine only, in working trim, was119,840 lb. Large numbers of these engines were built;. Great Northern Six-Ccupled Goods Locomotive a steam pressure of Ion lb. which contained scj. ft. ofheating surface. The total engine weight in working orderwas 104,792 lb. This engine was followed in 1893 by an-other similar in design but compounded on F. \Y. Webbsthree-cylinder system. These two engines were run in com-petition with the result that subsequent engines were allcompounds. The compound engines had two outside high-pressure cylinders 15 in. by 24 in. and one inside low-pressurecylinder 30 in. by 24 in., all driving on to the second coupledaxle. The high-pressure crank pins were at 90 deg. witheach other and the central crank made 135 deg. with each ofthe high-pressure cranks. The boiler contained sq. heating surface, the increase being in the tube surface. The some were provided with two-wheeled pony trucks at theleading end. thus becoming 2-8-0 or Consolidation type en-gines, the first in Britain. The coupled wheels of each c
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
