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Wheel chocks

Dieses Thema im Forum 'Heritage Rolling Stock' wurde von namron gestartet, 3 Januar 2019.

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  1. Doningtonphil

    Doningtonphil New Member

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    Hi Dan. Do you happen to know the BR Cat Number for these?
     
    Doningtonphil, 9 Januar 2019
    #21
  2. DR73202

    DR73202 New Member

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    DR73202, 9 Januar 2019
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    Doningtonphil und Martin Perry gefällt dies.
  3. Doningtonphil

    Doningtonphil New Member

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    Thanks DR for your detailed response
     
    Doningtonphil, 10 Januar 2019
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  4. mvpeters

    mvpeters Member

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    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, 11 Januar 2019
    #24
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