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P2 Locomotive Company and related matters

Discussion in 'Steam Traction' started by class8mikado, Sep 13, 2013.

  1. Jamessquared

    Jamessquared Nat Pres stalwart

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    About 4 thou ... (4' 8.5" is 1435.1mm, but the official definition of gauge now is 1435mm. I suspect it makes the square root of b*gg@r all difference...)

    Anyway, back to the Mikado.

    Tom
     
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  2. class8mikado

    class8mikado Part of the furniture

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    So if 60163 gets clearance to run the odd 90mph , would it worth getting clearance for this one to run at 83 (same rpm) ?
     
  3. John Stewart

    John Stewart Part of the furniture

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    Quite so. The Berne Convention fixed it at 1435mm. That was too complicated for the British at that time though.;)
     
  4. Steve

    Steve Resident of Nat Pres Friend

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    I thought it had actually grown 3.075mm since steam finished!
    (Do PW wallas work to these tolerances?)
     
  5. John Stewart

    John Stewart Part of the furniture

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    The increasing tendency to use centimetres depresses me because it is not an SI unit, one should go straight from metres down to millimetres. There is a good reason for this; the tolerances which need to be observed in most activities are seldom finer than a millimetre so the use of decimal places is avoided whereas with centimetres decimal places are all too often required. Almost everyone feels happier dealing with whole numbers and in manual multiplication (which was the only type available when I was at school) one always removed the decimal point,. did the multiplication, and re-inserted it afterwards with the appropriate number of digits after it.
     
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  6. Spamcan81

    Spamcan81 Nat Pres stalwart

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    I think you should get out more.:)
     
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  7. The Green Howards

    The Green Howards Nat Pres stalwart

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    I'm still getting over the use of centilitres in France - as in asking for a cinquante in a bar...!
     
  8. Steve

    Steve Resident of Nat Pres Friend

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    Where did I mention the dreaded centimetre, or anyone else, for that matter?
     
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  9. 61624

    61624 Part of the furniture

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    I seem to have spawned a flood of pedantry and will add to that by pointing out that what I wrote was:

    Isn't track also rather different nowadays?

    I didn't say anything about its gauge! What I meant was that rail is heavier, fixings to sleepers stronger and more secure, sleepers deeper and heavier - in all far more resistant to the forces that result in gauge spreading.
     
  10. flying scotsman123

    flying scotsman123 Resident of Nat Pres

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    I'm with @John Stewart on this, and anyway, it's rare that if you're having to use cm you won't need it to one decimal place anyway, in which case use mm, and also much more convenient in physics where you've got lot of very big and small numbers, clunking down by powers of three from milli to micro etc is much easier.
     
  11. John Stewart

    John Stewart Part of the furniture

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    You didn't. I just decided to indulge in a mild bit of thread drift.:)
     
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  12. Foxhunter

    Foxhunter Member

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  13. Matt37401

    Matt37401 Nat Pres stalwart

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    My apologies, my fault being silly.
     
  14. Ploughman

    Ploughman Part of the furniture

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    Over the last decade or so the actual track gauge has varied from 1435 to 1432 and back to 1435mm
    So 1.5mm difference at each rail. To deal with this radical change in gauge I understand that NWR now implement transition sleepers to cope with the change in gauge.
     
  15. Yorkshire Exile

    Yorkshire Exile Member

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    Graham,
    Is that the chime whistle l bought for 60163 or a new one?
    Barry
    Graham
    Would that be the chime whistle l bought to be fitted to 60163 or it another new one?
    Barry
     
  16. Johnb

    Johnb Nat Pres stalwart

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    It says in the Mikardo Messenger that it needs to be tuned so I would have thought a new one
     
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  17. Foxhunter

    Foxhunter Member

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    As far as I know Tornado still has that chime whistle Barry - this is a new one which will be tuned to the pre-war spec (which apparently is different to the later chime whistles).

    Foxy
     
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  18. Foxhunter

    Foxhunter Member

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  19. Foxhunter

    Foxhunter Member

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  20. Eightpot

    Eightpot Resident of Nat Pres Friend

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    Perhaps you'd like to try getting a quote using millimetres on here:-

    http://www.transglobalexpress.co.uk...kparcelquote&gclid=CNPnmI-JiNACFUEaGwodVlAGOg

    What's wrong with decimetres and decilitres, I say?
     

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