| 翻訳と辞書 |
| Mastodon (steam locomotive) ： ウィキペディア英語版 |
Mastodon (steam locomotive)
''Mastodon'' was the unofficial name of the Central Pacific Railroad's number 229, the world's first successful 4-8-0 steam locomotive.
==History and career==
The engine was designed and built by the road's master mechanic, Andrew Jackson "A.J" Stevens at Sacramento Locomotive Works in 1882. The locomotive had two highly unusual features: the firebox shape and the steam distribution. The only other locomotives to use such a valve gear were the 20 copies of ''Mastodon'' (see below) and CPR #237 ''El Gobernador.'' All other steam locomotives with slide valves had just a single valve in the center.
After being readied for its initial shakedown run, the engine met with a minor mishap in which its large "balloon" stack was knocked away from the boiler. During all the careful preparations, apparently nobody noticed that the stack was nearly taller than the doors to the roundhouse. The problem was fixed and an impressive series of trials on the steep grades of the Sierra Nevada soon followed, in which it easily outperformed the smaller 4-4-0 and 4-6-0 engines used by the railroad in those days. Later, ''Mastodon'' was sent east to the Cooke Locomotive and Machine Works, along with blueprints and men who had built the engine, where more than 20 copies were produced; these were identical except for having their cylinder bore increased to (from ''Mastodons ). The success of this engine inspired railroad president Leland Stanford to instruct Stevens to build an even larger locomotive, which would be the largest the world had ever seen up until that time. This engine, a 4-10-0 named ''El Gobernador'' (CPRR #237), looked virtually identical to ''Mastodon'', with the exception of being longer and having an additional pair of driving wheels. Unfortunately, this engine, unlike its predecessor, was doomed to failure.
Sometime in the early 20th century, No. 229 (now renumbered as Southern Pacific 2925) was converted from wood to oil-firing and was later assigned to the Oregon lines. Despite its historical significance, the engine was broken up for scrap at the Brooklyn Shops in Portland, Oregon, in June of 1935.
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「Mastodon (steam locomotive)」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.
|
|