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P2 Locomotive Company and related matters

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

  1. Bertie Lissie

    Bertie Lissie New Member

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    If the problem with P2 crank axles stems from too much adhesion then surely the P2 Locomotive Trust should develop a device to sprinkle 'the wrong type of leaves' just ahead of the driving wheels.
     
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  2. Sheff

    Sheff Part of the furniture

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    ....... don't call us ...... ;)
     
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  3. W.Williams

    W.Williams Member

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    Bear in mind, that increasing the diameter will decrease peak stress load, but another huge factor is the quality of modern steels, which is like for like more robust having few inclusions and more well defined chemical and mechanical properties.

    Also, there are grades available now that are significantly stronger and would have been the envy of designers in the 30's.

    Either way, this is a materpiece of a crank axle and a huge milestone for the loco.
     
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  4. 8126

    8126 Member

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    So basically 12% stronger in bending and torsion (10^3/9.625^3) based on the section alone. As @W.Williams correctly points out, the materials used will be of higher quality and they may well have chosen a stronger grade as well, so the actual improvement is likely to be more than this.
     
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  5. std tank

    std tank Part of the furniture

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    Depends where the steel is made.
     
  6. W.Williams

    W.Williams Member

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    Hahaha oh no...please dont start that one !
     
  7. Kylchap

    Kylchap New Member

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    South Africa
     
  8. Foxhunter

    Foxhunter Member

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    According to David Elliott the updated FEA study by Mott McDonald showed the improvement in fatigue lives for the worst scenarios with the increased axle diameter and modified key ways is dramatic (in the order of a factor of at least 10) leading to the conclusion that the Trust will have little difficulty in demonstrating the minimum life of a
    quarter of a million miles. Given the increased power of the P2 design and the problems found with the crank axle, there was also a desire to improve the material for the sweeps. Somers Forge proposed a stronger material which retained the toughness of the original EN8 steel and this was duly approved.

    Foxy
     
  9. W.Williams

    W.Williams Member

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    What grade are the axles, just out of curiosity?
     
  10. Foxhunter

    Foxhunter Member

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    A staggering month for the P2 project, £117,000 raised and half the fund for the cylinders covered! Wow!

    "£100,000 appeal for the cylinder block for new Gresley Class P2 steam locomotive No. 2007 Prince of Wales reaches 50% in just one month. October was a record breaking fundraising month for The A1 Steam Locomotive Trust with over £117,000 donated or pledged towards No. 60163 Tornado and No. 2007 Prince of Wales. The Cylinder Club welcomed 54 new members, donating £1,000 each, 12 A1 Covenantors, 12 P2 Covenators, one Boiler Club member, two Mikado Club members, two 163 Pacifics Club members, six Tornado Team (our children’s club for 5-15 year olds) members, over £2,500 in Dedicated Donations and over £17,000 in donation. These donations were thanks to our P2 Roadshow in Dundee, ‘The Tees Tyne Express’ railtour with No. 60163 Tornado and a number of visits to Darlington Locomotive Works."

    https://www.p2steam.com/2017/11/07/full-steam-ahead/

    Foxy
     

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