The Best Articulated Steam Locomotive

Panthera Pardus Jan 26, 2008

  1. Panthera Pardus

    Panthera Pardus TrainBoard Member

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    Here are advantages to different locomotives (**= compoud locomotive):

    *4000 class 4-8-8-4 "Big Boy": Length-132' 9" (longest steam locomotive); Power (cyl. hp.)-10,000@70mph (most of any st. loco.), 5,200@20mph. [​IMG]

    *H-8 class 2-6-6-6: Power (hp.)-7,500@40mph; weight-724,500-778,500 pounds (exact weight unknown; possibly heaviest steam locomotive when tenderless) [​IMG]

    *800 class/AE class 2-10-10-2**: Tractive Effort (starting)- 176,600 pounds, most of any steam locomotive; only successful st. loco. with more than 16 driving wheels. [​IMG]

    *AC series 4-8-8-2 "Cab-Forward': best visibility of any steam locomotive; no smoke can get to cab. [​IMG]

    Z-5 class 2-8-8-4 "Yellow Stone": Most grate area, evaporative heating surface, and super heating surface of any steam locomotive.

    Add any others that you think are important.
     
  2. SteveM76

    SteveM76 TrainBoard Member

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    Hands down the finest articulateds were the N&W Y6b and Class A. They did well holding off those boxes with internal combustion engines.
     
  3. BNSF FAN

    BNSF FAN TrainBoard Supporter

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    I'm with Steve on the N&W Y6b. :)
     
  4. BoxcabE50

    BoxcabE50 HOn30 & N Scales Staff Member TrainBoard Supporter

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    One aspect I like, is listening to sound from an articulated. Especially when easing along at a low speed. The uneven exhaust barking is fascinating to hear.

    Boxcab E50
     
  5. swissboy

    swissboy TrainBoard Member

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    Garratts are also articulateds

    A different type of articulateds is the Garratt type. Its advantages are lower boiler positioning and reduced overhangs in curves. The Australian AD60 (built by Beyer-Peacock in the UK) is standard gauge and weighs about 263 tons.
    See also:
    Garratt for originals and models. The attached picture is from the site given above. It shows a double-header.
     
  6. Panthera Pardus

    Panthera Pardus TrainBoard Member

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    Here you go:

    [​IMG]




    But what of this?



    [​IMG]
     
    Last edited by a moderator: May 6, 2009
  7. Panthera Pardus

    Panthera Pardus TrainBoard Member

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    Edited post.
     
  8. wurlitzer153

    wurlitzer153 TrainBoard Member

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  9. Triplex

    Triplex TrainBoard Member

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    I have wondered if the Triplex concept wasn't a dead end. In later years, various "advanced steam" designs incorporated improved exhaust systems and steam passages, not to mention new boiler and firebox designs. Several changes increased steam-raising ability, and that might have solved the main problem with the triplex.
     

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