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Wheel chocks

Rasprava u 'Heritage Rolling Stock' pokrenuta od namron, 3. Siječanj 2019..

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  1. Doningtonphil

    Doningtonphil New Member

    Pridružen(a):
    9. Travanj 2013.
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    Hi Dan. Do you happen to know the BR Cat Number for these?
     
    Doningtonphil, 9. Siječanj 2019.
    #21
  2. DR73202

    DR73202 New Member

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    14. Veljača 2009.
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    DR73202, 9. Siječanj 2019.
    #22
    Doningtonphil and Martin Perry like this.
  3. Doningtonphil

    Doningtonphil New Member

    Pridružen(a):
    9. Travanj 2013.
    Poruka:
    18
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    9
    Thanks DR for your detailed response
     
    Doningtonphil, 10. Siječanj 2019.
    #23
  4. mvpeters

    mvpeters Member

    Pridružen(a):
    23. Lipanj 2008.
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    Muškarac
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    Retired
    Grad:
    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, 11. Siječanj 2019.
    #24
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