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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク NER Class B1 ： ウィキペディア英語版 NER Class B1 The NER B and B1 Classes (later London and North Eastern Railway () Classes N8) were two classes of 0-6-2 tank locomotives designed by Thomas William Worsdell for heavy freight and mineral on the North Eastern Railway, introduced in 1886. They were tank engine versions of the NER C1 Class 0-6-0, using both simple expansion (Class B1) and also the von Borries configuration for two-cylinder compound locomotives (Class B). Both types were later rebuilt using saturated steam and the compounds were also rebuilt as simple expansion locomotives, and eventually formed a single class (albeit with variations in dimensions). Many of the superheated locomotives were also later returned to saturated steam as their original boilers wore out. As a result the classes have had a very complex history mechanical history. ==B1 Class== The first batch of ten locomotives were built at Darlington Works between June and November 1886. They had Joy valve gear and slide valves. They were originally designated Class B, but after 1888 were designated B1 class to differentiate them from the compound locomotives. They were given numbers which filled gaps in the sequence between 14 and 1165. An eleventh locomotive of the same design (No. 74) was built at Gateshead Railway Works in March 1888 for the purposes of comparison with a compound version built two months earlier (see below under B class). All of these locomotives were rebuilt (sometimes on more than one occasion) by Wilson Worsdell and/or Vincent Raven between 1893 and 1924. Seven of the eleven were fitted with larger cylinders, Stephenson valve gear and piston valves, raising the weight to . Six out of these seven were also fitted with superheating between 1919 and 1930, raising the weight to , although in two of these cases they were returned to saturated steam in 1941 and 1944. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「NER Class B1」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.