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发表于 2017-11-30 14:37:46
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美国那么喜欢玩Rebuilt，我猜测很大的原因就是成本。
美铁以外的其他公司，联合太平洋、伯灵顿北方圣太菲、CSX、诺福克南方、KCS等等还有其他二级铁路，都是私营，当然要讲究成本，怎么省钱怎么来。
美铁虽然是国企，但是美国可不是中国，否则还能落到F40PH退役掏空机械间改行李车的事吗？
节约成本的另一个做法，就是买旧车，然后返厂大修或改装。这个事诺福克南方铁路没少干。其中一个，当年EMD出SD90MAC-H 6000马力机车，联合太平洋买了300多台，后来因为四冲程265H柴油机可靠性不好，返厂换4300马力的710柴油机，获得SD9043MAC这么个不太正式的称号。2014年诺福克买下了其中100台这款车，然后反给EMD继续改装，换了驾驶室，电路也改了，最后新型号叫SD70ACu。
刚才看维基，诺福克可以说是各种淘二手然后各种改装翻新。新车也买，但是我感觉他家可能是倒腾二手车最在行的铁路公司
维基百科词条Norfolk Southern Railway
https://en.wikipedia.org/wiki/No ... Railway#Locomotives
Locomotives
A large majority of Norfolk Southern's locomotives come from the companies many predecessors, which include but are not limited to Norfolk and Western, Southern Railway, and Conrail. Of the engines from Norfolk and Western (NW) and Southern, many were equipped with high short hoods. Although these locomotives are aging, a significant number of 'high hoods' still remain on the roster as of January 2017. Norfolk Southern is in the process of getting rid of them by scrapping, rebuilding, or selling the many units on the roster and units that are stored.
Historically, NS has only purchased DC traction diesel locomotives, and was one of the last North American AC-traction hold-outs aside from Canadian National Railway. In September 2008, however, NS placed its first order for new AC traction locomotives: 23 GE ES44ACs, numbered 8000-8023. In the years since, NS has purchased several more ES44ACs as well as over 150 EMD SD70ACes.
Beginning in 2012, Norfolk Southern began to take delivery of several types of older EMD locomotives from various railroads and leasing companies,2012年起，他们就开始从各家买二手车 including 9 ex-BNSF "tri-clops" SD60Ms, 6 ex-ATSF (BNSF) SD75Ms, the remaining 12 ex-Conrail SD80MACs owned by CSX, a majority of Union Pacific's SD9043MACs（就是前面说的那100台）, and more that 130 SD40-2s from First Union Rail, CIT Group, and Helm Leasing.
Norfolk Southern is the only railroad ever to own SD80MACs and SD90MACs simultaneously. Norfolk Southern owns all of the SD80MACs and 100 of the SD90MACs from Union Pacific. Norfolk Southern also acquired 10 SD90MACs from CIT Group in exchange for 15 MP15DCs. The SD90MACs are currently being rebuilt into SD70ACus. The SD80MACs will eventually enter a similar rebuild program and retain their 20-710G3B engine.
Norfolk Southern has a very large program for re-cabbing locomotives换驾驶室. NS has its own designed "Admiral Cab,"还是自己设计的驾驶室 which they use on their 'standard cab' rebuilds. NS has rebuilt GP38-2s, SD40-2s, ECO units, and many more with the Admiral Cab.
A former Southern Railway SD40-2 with a new Admiral Cab (on the left), being passed by another NS train.
In 2015, Norfolk Southern began a program to convert aging and unreliable GE Dash 8-40Cs into Dash 8.5-40CW units (NS calls them (D8.5-40CW).DASH8系旧车可靠性下降，想升级改装延寿 The few units that were upgraded included new cabs, rebuilt and modified engine, electrical upgrades and more.换驾驶室、换发动机、换电路等 In 2016, the program was deemed unsuccessful, and ET44AC units were ordered to replace the un-rebuildable 8-40Cs.有些车实在没救了，只好买新车取代
In 2016, NS bought 46 GE ET44AC Locomotives, also known as Tier 4 Locomotives, numbered 3600-3646. 46台ET44AC新车These are the first Tier 4 road engines purchased, and not immediately stored, by NS. They were purchased as the replacement for the Dash 8-40C units, many of which are retired and/or scrapped. Norfolk Southern has an order for 34 more units, due for delivery in 2017. The first order was the first order of new locomotives from NS since late 2014, when EPA Tier 4 requirements were put in place.
In 2016, Norfolk Southern began a rebuild program on the Dash 9-40C units又回头折腾Dash-9系. The rebuild involved overhaul of the engine翻修柴油机, emissions upgrades排放升级, a new cab新驾驶室 (featuring GE Trip Optimizer行车优化？, PTC安全功能, and NS Cab Signals诺福克自家的驾驶室信号机 / Locomotive Speed Limiter机车限速器), new electronics电路, DPU 分散式动力单元，就是由本务遥控的，位于列车中部或尾部的机车and ECP貌似是电空制动？ capabilities, increased weight增加重量, and an electric parking brake电动驻车刹. Norfolk Southern plans on rebuilding all of the Dash 9-40Cs and some of the Dash 9-40CWs. The new locomotives are being classified as GE AC44C6M.
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楼主: Lion2013
发表于 2017-11-30 12:30:09
