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Construction of 3' Gauge Blyth for Southwold Railway Trust by NBR Engineering, Darlington

Discussion in 'Narrow Gauge Railways' started by David Humphreys, May 16, 2019.

  1. David Humphreys

    David Humphreys New Member

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    The boiler was finished last week and is awaiting final certification from British Engineering.

    Today, the chassis assembly was started.

    Have added the photo of the completed boiler to complete the record to date
    [​IMG]

    [​IMG]

    [​IMG]
     
  2. Russ Bulley

    Russ Bulley New Member

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    Why build a new loco when there is are two perfectly good 3 foot gauge locos Kettering Furnaces No.8 and Handyman from Kettering ironstone railways crying out for support, one at Market Harborough and the other at the NRM?
     
  3. David Humphreys

    David Humphreys New Member

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    The Trust who is paying can choose whatever locomotive they like.
     
    Last edited: May 16, 2019
  4. ghost

    ghost Part of the furniture

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    Perfect response David!

    Great work with the boiler, looking forward to seeing this loco emerge, hopefully you'll be able to post a few pics here from time to time as construction progresses?

    Keith
     
  5. David Humphreys

    David Humphreys New Member

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  6. kscanes

    kscanes Resident of Nat Pres

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    Probably because The Southwold Railway want a Southwold Railway locomotive?
     
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  7. ady

    ady Well-Known Member

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    And their owned by someone else. The NRM may not want to enter a lease agreement. The loan of No. 8 might come with strings attached.

    Annnd.... a new locomotive has the benefits of a new locomotive... i.e. won't be worn out...
     
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  8. Guitar

    Guitar New Member

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    I think having an original Southwold locomotive is a statement of intent as much as it is having a working locomotive.
     
  9. Hicks19862

    Hicks19862 Member

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    Congratulations to the Southwold Trust and all of the team working on this project.
     
  10. David Humphreys

    David Humphreys New Member

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    Southwold boiler finished, tested and approved by British Engineering Services.


    upload_2019-5-24_22-22-17.jpeg

    upload_2019-5-24_22-24-32.png

    upload_2019-5-24_22-22-41.png
     
  11. cav1975

    cav1975 Member

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    Is it normal for welded boilers to have such sharp corners where the plates are welded together?
     
  12. David Humphreys

    David Humphreys New Member

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    Yes, if that is what is designed.
     
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  13. Steve

    Steve Resident of Nat Pres Friend

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    Square cornered boilers aren’t popular with traditionalists but are well proven.
     
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  14. cav1975

    cav1975 Member

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    I assume that the designers have taken account of the lessons learned here https://www.news.com.au/travel/trav...r/news-story/bc723a15ce58a97d839483bfd0e7ce4a

    ........the square shape of the Comet’s windows played a big role in the metal fatigue that caused those crashes.

    The sharp corners of the windows put the surrounding metal under extra stress in high altitudes — as much as two or three times more than other places on the plane. The stress was concentrated in the four corners of every window, causing the metal fatigue.............
     
  15. mdewell

    mdewell Well-Known Member Friend

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    I don't think there are many windows in steam loco boilers. ;)

    (Sorry, someone had to say it :D)
     
  16. cav1975

    cav1975 Member

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    Indeed Mark:), but they are pressure vessels subject to fatigue with (in this case) internal sharp corners.

    Still, if they meet the various codes of practise, etc. all will be well.
     
  17. arthur maunsell

    arthur maunsell Well-Known Member

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    yes but they were internal squares not external. The stress cracks would radiate out from the corners, which aren't there on the boiler.
     
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  18. arthur maunsell

    arthur maunsell Well-Known Member

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    how much would such a loco be costing, ballpark. ?
     
  19. Johann Marsbar

    Johann Marsbar Well-Known Member

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    According to their May 2019 Newsletter that someone gave me the other day, they are quoting around £250,000 to complete the loco. Don't know whether the boiler is included in that, though presumably so.
    The "rolling chassis" is apparently the next phase (frames/wheels/cylinders/motion) and is costed at over £130,000.
     
  20. huochemi

    huochemi Part of the furniture

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    Talyllyn / No1, has had an all-welded boiler without flanged plates, since rebuilding c. 1957.
     

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