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P2 Locomotive Company and related matters

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

  1. Richard Roper

    Richard Roper Member

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    Looking at the P2 website, their level of investigative research is extremely thorough, and with the extremely good fortune of being able to be introduced to George Carpenter, has led to an invaluable line of contact with people involved with the development and implementation of Franklin B valvegear at ALCO in the USA.

    Reading of George Carpenter's connections in themselves is fascinating stuff, I'd love to be able to read his memoirs of working with Stanier, Bulleid, Chapelon & Porta. All through the kindness of a P2 supporter. Fantastic stuff!

    When you read about the USA connections with Vernon & Charles Smith, their retention of archive material, and also the fact that both drawings and manuals survive and have been borrowed, the story becomes even more absorbing.

    I hope that a comprehensive book can be produced on the construction of No. 2007 (To compliment Andrew Hardy's excellent book), covering the areas of research, discoveries etc., which have emerged since Andrew's book was written.

    Oh, and I'd absolutely LOVE to see the 10.25" Gauge (I presume, says 10" on the P2 site) P2 model built by one of the supporters. That in itself will be damned impressive!

    Richard.
     
    Last edited: May 10, 2018
  2. 240P15

    240P15 Well-Known Member

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  3. Foxhunter

    Foxhunter Member

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    Is this what you are referring to Knut?

    [​IMG]

    Foxy.
     
  4. 240P15

    240P15 Well-Known Member

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    Yes, it is:) Great engineering.
     
  5. S.A.C. Martin

    S.A.C. Martin Part of the furniture

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    Mikado before the end of the year? Terrific update.
     
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  6. The Green Howards

    The Green Howards Part of the furniture Friend

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    Deleted.
     
  7. 240P15

    240P15 Well-Known Member

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  8. Richard Roper

    Richard Roper Member

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  9. philw2

    philw2 New Member

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    Why are they quartering the wheels of a three-cylinder loco please?

    Sent from my Nexus 7 using Tapatalk
     
    Last edited: Jun 4, 2018
  10. philw2

    philw2 New Member

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    Sent from my Nexus 7 using Tapatalk
     
  11. Jamessquared

    Jamessquared Nat Pres stalwart

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    Surely “quartering” in this context just refers to the generic process of ensuring that the crank pins have the correct relative alignment; not a specific statement that they are at 90 degrees to each other.

    Tom
     
  12. BrightonBaltic

    BrightonBaltic Member

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    I'd presume it's technically 'thirding', but I doubt such a word exists in the steam engineer's lexicon...
     
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  13. class8mikado

    class8mikado Member

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    'Blessed are the cheesemakers....'
     
  14. W.Williams

    W.Williams Well-Known Member

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    My understanding is they are still at 90degrees to each other?
     
  15. LMS2968

    LMS2968 Part of the furniture

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    No, 120 degrees. 90 degrees is for two- and four-cylinder engines only.
     
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  16. W.Williams

    W.Williams Well-Known Member

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    Yes, that makes sense.
     
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  17. 242A1

    242A1 Member

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    Well, yes and again no. It all depends. If we are only considering simple expansion types, which we usually are since by far the bulk of our attention is devoted to UK practice, then the answer is yes (though for four cylinder simples you also have the 135 degree alternative setting).

    Three cylinder compounds are another area, they can have 120 degree settings or 135 - 90 -135.

    There are other arguments concerning optimal settings, but there is little point in entering these areas since we are never going to come across their application.
     
  18. 30854

    30854 Part of the furniture

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    ...... and then there was Mr Paget's creation on the Midland ..... ;)
     
  19. LMS2968

    LMS2968 Part of the furniture

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    We can always find exceptions and quote the wonderful and simply bazaar, but 99% of engines will conform to what I said.
     
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  20. BrightonBaltic

    BrightonBaltic Member

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    Weren't the crank angles on Bulleids and some Lord Nelsons a bit weird too?
     

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