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LNER Class V4 : ウィキペディア英語版 | LNER Class V4
The London and North Eastern Railway Class V4 was a class of 2-6-2 steam locomotive designed by Sir Nigel Gresley for mixed-traffic use. It was Gresley's last design for the LNER before he died in 1941. The V4s had similarities in their appearance and mechanical layout to the V2 "Green Arrow" class. The V2s, introduced some years previously, were large and heavy locomotives, with very limited route availability. The V4 was a lightweight alternative, suitable for use over the whole of the LNER network. ==Features== Two locomotives were built at the LNER's Doncaster Works in 1941. The first engine, 3401 ''Bantam Cock'', had a scaled down version of the Gresley Pacific boiler with a grate area of 27.5 sq ft. Its tractive effort of 27,000 lbs was produced by boiler pressure of 250 psi and three cylinders of 15" diameter. The second locomotive, 3402, incorporated a fully welded steel firebox and a single thermic syphon for water circulation. It was not named, but was known unofficially as "Bantam Hen".
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