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Coupled wheels - what if the wheels are slightly different sizes?

Discussion in 'Steam Traction' started by Raimondo, Nov 4, 2016.

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  1. Avonside1563

    Avonside1563 Well-Known Member

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    I never had the veracity of the story confirmed so glad you can put that one to rest.
     
    Avonside1563, Nov 7, 2016
    #21
  2. Allegheny

    Allegheny Member

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    The following Wikipedia page may help answer the question. Scroll down to the paragraph headed "Forces on wheels, creep"

    https://en.wikipedia.org/wiki/Adhesion_railway
     
    Allegheny, Dec 7, 2016
    #22
  3. daveannjon

    daveannjon Well-Known Member

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    I think it was one of the LMS loco engineers who recalled seeing an American loco coming into a depot with a broken tyre, and having a new wheelset fitted in record time and out on the road again - no thought of matching the wheel diameter though!

    Dave
     
    daveannjon, Dec 13, 2016
    #23
  4. 8126

    8126 Member

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    Roland Bond, maybe? I seem to remember reading a chapter in a book of his about a tour round North America, in which he was by turns hugely impressed and absolutely horrified by various aspects of American practice.
     
    8126, Dec 13, 2016
    #24
  5. Martin Perry

    Martin Perry Nat Pres stalwart Staff Member Moderator Friend

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    I have read that it was not unusual to shrink on a new 'tire' in running sheds (No Gibson rings etc).
    db95f89706c257525c1f17bb1d06ac00.jpg
     
    Last edited: Dec 14, 2016
    Martin Perry, Dec 14, 2016
    #25
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  6. Steve

    Steve Resident of Nat Pres Friend

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    There's a video of doing this on the loco, as shown in the still, but I failed to track it down when I searched. Plenty use of a sledgehammer to get the tyre on and G clamps to hold it in place whilst it cools.
     
    Steve, Dec 14, 2016
    #26
  7. threelinkdave

    threelinkdave Well-Known Member

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    I hate to think what the balance across the axles is. The SVR learnt that just changing a tender spring without re weighing can lead to a derailment. Any serious maintenance with the running gear and its over the weighing system
     
    threelinkdave, Dec 14, 2016
    #27
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