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Wheel chocks

本贴由 namron 于 2019-01-03 发布. 版块名称: Heritage Rolling Stock

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  1. Doningtonphil

    Doningtonphil New Member

    注册日期:
    2013-04-09
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    9
    Hi Dan. Do you happen to know the BR Cat Number for these?
     
    Doningtonphil, 2019-01-09
    #21
  2. DR73202

    DR73202 New Member

    注册日期:
    2009-02-14
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    DR73202, 2019-01-09
    #22
    已获得Doningtonphil和Martin Perry的支持.
  3. Doningtonphil

    Doningtonphil New Member

    注册日期:
    2013-04-09
    帖子:
    18
    支持:
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    Thanks DR for your detailed response
     
    Doningtonphil, 2019-01-10
    #23
  4. mvpeters

    mvpeters Member

    注册日期:
    2008-06-23
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    716
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    838
    性别:
    男
    职业:
    Retired
    所在地:
    Massachusetts, USA
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Just to confuse things, chocks are referred to as 'TRIGS' at www.TrolleyMuseum.org
    The origin is not known but may refer to the trigonometry required to calculate a triangle with a curved hypotenuse.

    If it's any help for those making their own, I'd suggest:
    A softer wood rather than a harder one - it's generally preferable to crush rather than ride up on.
    Cut the curve as close as possible to the wheel radius - too shallow & the wheel will climb.
    Don't paint the base - maximum friction is needed on the railhead.
    We release the brakes & confirm that the car is secure.

    The only Scotch we have around here is imported in bottles.......
     
    mvpeters, 2019-01-11
    #24
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