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P2 Locomotive Company and related matters

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

  1. class8mikado

    class8mikado Well-Known Member

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    Square section coiled springs ?
     
  2. 242A1

    242A1 Member

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    I know this subject has come up before but are we thinking along the lines of what are called die springs?
     
  3. LMS2968

    LMS2968 Part of the furniture

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    They're actually trapezoidal section. This is a side control spring from 2968's pony truck.

    [​IMG]
     
  4. 242A1

    242A1 Member

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    Could you give me some idea of the size of these?
     
  5. J Rob't Harrison

    J Rob't Harrison New Member

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    Well, from the photo it looks like it's sitting on a pallet, so maybe 75 to 80mm overall diameter? And (scaled) approx 200 - 250mm in height?
     
  6. LMS2968

    LMS2968 Part of the furniture

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    Note that there are two horizontal transverse springs, one ahead of and one behind the slide assembly.
    [​IMG]
     
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  7. 242A1

    242A1 Member

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    Thank you.
     
  8. 242A1

    242A1 Member

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    Thank you.
     
  9. std tank

    std tank Member

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    [​IMG][/QUOTE]
     
    Last edited: Sep 12, 2021
  10. std tank

    std tank Member

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    Oops two posts.
    This spring is to LMS drawing D-10693. It is 1'-8 7/8" long, un-compressed, 6 1/4" OD and 2 3/4" bore. (I do not do metric on steam locos unless it is ejector or injector cones). This particular spring is now available in round section.
    LMS2968 ,see 82045's leading pony truck.
     
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  11. Richard Roper

    Richard Roper Well-Known Member

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  12. 2392

    2392 Member

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    A most interesting read, Richard. I like how they could only make a third scale 3d printed model of one of the difficult features in the drawings. Saying that don't knock it, I say! The Short Stirling prototype was a third scale flying model of the planned bomber. There was only space for a pilot in the cockpit rather than full 7 man crew and they used 4 Tiger Moth [I think, certainly engines from the DH Moth range] engines in lieu of the full size engines.
     
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  13. Mark Thompson

    Mark Thompson Well-Known Member

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    These really are cutting edge techniques at work, here. The cylinder block and cambox are truly the business end of the whole reworking of this engine, and I for one find it totally engrossing, using of state of the art design and fabrication processes to finally bring this 87 year-old design conundrum to its ultimate, and very belated, fruition.
     
  14. W.Williams

    W.Williams Well-Known Member

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    Interesting candidate for 3D printing.

    Oil and Gas manufacture is the natural home for this assembly. Welding and Heat Treatment are routine there.
     
  15. Richard Roper

    Richard Roper Well-Known Member

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  16. 240P15

    240P15 Well-Known Member

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    Thanks for keeping us updated Richard!:)
    I haven`t been able to visit this forum for a while now ,so it`s fantastic to see the progress of this project!

    Knut
     
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  17. Foxhunter

    Foxhunter Member

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    I suspect David Elliott has better things to do than wait weeks while a 3D printer makes a full-size model of that component! 1/3 scale works well enough.

    Foxy.
     
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