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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 Southern Pacific 4294 ： ウィキペディア英語版 Southern Pacific 4294 Southern Pacific 4294 was the last steam locomotive ordered new by Southern Pacific Railroad (SP). It was built by Baldwin Locomotive Works in March 1944, and was used hauling SP's trains over the Sierra Nevada, often working on Donner Pass in California. == Construction and use == SP4294 was the last of 256 Southern Pacific articulated cab forwards starting with class AC-1. 4294 was the last in a group of 20 locomotives that comprised SP's AC-12 class of 4-8-8-2 cab forward locomotives. Its most distinguishing feature was that the cab and firebox were at the front of the locomotive instead of the traditional rear. This was done essentially by running a 2-8-8-4 machine backwards with myriad modifications. The engineer and fireman swapped sides and faced away from the firebox. The tender was moved to behind the "new" locomotive back to improve forward vision. The smoke box end coupling was strengthened. The power reverse lever (Johnson Bar) and the steam throttle motion direction was reversed. The left side Walschaerts return (fly) cranks are mounted 36 degrees left of the drive crank radial, when the drive pin is at bottom-dead-center. The right side return cranks are mounted 36 degrees right of the drive crank radial, when the drive pin is at bottom-dead-center, to reverse the expansion link timing on both sides. This specific SP design was a necessity in the long tunnels and snow sheds of Donner Pass and other mountainous regions where it kept smoke, heat, and soot away from the operating crew and offered them clean, cool air to breathe. It also provided the crew a superb view. It entered service on March 19, 1944, and was retired from active service on March 5, 1956. 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「Southern Pacific 4294」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.