Ac4400cw Name Definition?

Discussion in 'TSW General Discussion' started by w.lichko, Sep 25, 2020.

  1. w.lichko

    w.lichko Well-Known Member

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    AC = Alternating Current
    4400 = 4400 horsepower
    CW = ?

    This might be a dumb question, but does anyone know what the CW stands for?
     
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  2. breblimator

    breblimator Guest

    SOURCE
     
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  3. Michael Newbury

    Michael Newbury Well-Known Member

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    Hopefully this helps

    C means 3-axle truck (6 axle locomotive), W means Wide cab, so AC4400CW would be AC traction, 4400 horsepower, 6 axle, widecab. CTE stands for Controlled Tractive Effort, a software upgrade to Union Pacific's GE locomotives so designated. On EMD locomotives, the model designation is just that - a model designation.
     
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  4. breblimator

    breblimator Guest

    Correct :D
     
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  5. w.lichko

    w.lichko Well-Known Member

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    Ahhh now I understand, thanks a lot.
     
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  6. Michael Newbury

    Michael Newbury Well-Known Member

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    You're welcome
     
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  7. JGRudnick

    JGRudnick Well-Known Member

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    A "C" truck doesn't just have 3 axles. Letters denote powered axles and numbers denote dummy axles. So a "C" truck has 3 powered axles. BNSF railway bought some of their newest locomotives with A1A trucks. A1A = 2 powered axles with a dummy axle between them.

    So in the AC4400CW, the second C is for 6 powered axles total (C-C).
    In BNSF's ES44C4 designation, the C is for AC traction, and the 4 is for 4 powered axles total (A1A-A1A).
     
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  8. 59321747

    59321747 Well-Known Member

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    [QUOTE =“ JGRudnick,发布:182279,成员:12493”]“ C”卡车不仅有3个车轴。字母表示动力轴,数字表示虚拟轴。因此,“ C”型卡车有3个动力车轴。BNSF铁路公司使用A1A卡车购买了一些最新的机车。A1A = 2个动力轴,中间有一个虚拟轴。

    因此,在AC4400CW中,第二个C代表6个总动力轴(CC)。
    在BNSF的ES44C4名称中,C表示交流牵引,而4表示总共4个动力车桥(A1A-A1A)。[/ QUOTE]
    您是美国的朋友吗?如果可以,请问一个问题吗?
     
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  9. Blacknred81

    Blacknred81 Well-Known Member

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    And for some reason UP decides to designate those as C44ACCTE, instead of AC4400CW-CTE.
    553e60f9415cd.image.jpg
     
    Last edited: Sep 27, 2020
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  10. JGRudnick

    JGRudnick Well-Known Member

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    There could be two reasons for this...
    1.) There was is no such thing as a standard cab AC4400CW, so there is no need for the W to differentiate models
    2.) UP's computer can only handle a certain number of characters. CSX classifies their SD33ECOs as SD40e3s because the computers can only use 6 character classifications.
     
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  11. JGRudnick

    JGRudnick Well-Known Member

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    Yes
     

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