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STREAMLINED DUCHESS BACK ON MAIN LINE

Discussion in 'Heritage Railway' started by Robin Jones, Nov 3, 2012.

  1. Robin Jones

    Robin Jones New Member

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    RESTREAMLINED LMS 4-6-2 No. 6229 Duchess of Hamilton will be hauled by Deltic King’s Own Yorkshire Light Infantry from the National Railway Museum at York to the Locomotion museum at Shildon on Thursday. See facebook.com/heritagerailway for more details and timings.
     
  2. TonyMay

    TonyMay New Member

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    Just out of interest, what is 46229's prospects of running on the main line with the wind armour on? Would the drifting smoke problem that saw blinkers attached to the Big Lizzies also manifest itself on a streamliner?
     
  3. LMS2968

    LMS2968 Part of the furniture

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    No, it was never a problem with the streamliners.
     
  4. TonyMay

    TonyMay New Member

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    No; it wasn't perceived as a problem with the non-streamliners until 1945 or so when they started putting deflectors on, by which time the streamliners were being destreamlined anyway. Now that it is recognised as a problem, it needs a solution. I can hardly think that the addition of streamlining would help lift exhaust from the chimney.
     
  5. LMS2968

    LMS2968 Part of the furniture

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    I'll repeat: it was never a problem with the streamliners, the aerodynamics of which are totally different from a non-streamliner. The flat front of the conventional smokebox has the effect of pushing the air outwards and upwards as the engine moves at speed. This means that there is less air alongside and above the boiler, creating a partial vacuum there which draws the exhaust down into that area and the driver's view. The streamliners, as was supposed to happen, disturbed the air far less and so there was no low pressure area and the exhaust was not drawn down.

    As built, the non-streamlined engines had little problem either; it was the fitting of double chimneys resulting in a lower exhaust pressure, which failed to lift the gases above the low pressure area, which initiated the problem.
     
  6. RalphW

    RalphW Part of the furniture Staff Member Administrator Friend

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    There was me looking at the thread title thinking that we were going to see her under her own steam, what a let down when I looked at the first post, but then I realised that it's a reporters headline and is a bit economical with the facts.
     
  7. david1984

    david1984 Well-Known Member

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    Patience Ralph, Im sure it'll be only a matter of time till Hamilton is back in anger, there's too much temptation to let it loose in streamlined form to ignore for too long.
     
  8. Fred Kerr

    Fred Kerr Part of the furniture

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    But that depends on the support and effort from the Director; with Srteve Davies's departure there is a question of what the future NRM policy will be - both on main line running and the necessary engineering support.
     
  9. RalphW

    RalphW Part of the furniture Staff Member Administrator Friend

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    David when you get to 3 score years and ten, patience begins to start getting in shorter supply, going by the longevity of my fathers side on the family I've only got about 30 years left.......:eek:hwell:
     
  10. Spamcan81

    Spamcan81 Nat Pres stalwart

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    I'll have to dig out the article but somewhere I read an article that claimed the casing on the LMS streamliners was less efficient at lifting the exhaust than the casing on the A4s. Something to do with the LMS casing being dead level along the top as opposed to the curve of the A4s.
     
  11. 5944

    5944 Part of the furniture

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    In case anyone doesn't know, move on Thursday is caped. However, 55002 has been involved with some shunting at the NRM today, which meant it worked on the mainline for the first time in 30+ years. 60009 was also used for the shunting, which included moving 60008 from the wagon works to the sidings outside the great hall.
     

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