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  1. David Withers
    Post

    Nene Valley Railway

    It may be that the extra two lines on the gauge were added sometime after 656 was built, perhaps after it finished service with the Danish State...
    Post de: David Withers, 22 Sep 2022 în forum: Heritage Railways & Centres in the UK
  3. David Withers
    Post

    Nene Valley Railway

    The dial of this particular gauge was re-made by specialists. They did a superb job of copying the original, except that the rather gay pink line...
    Post de: David Withers, 21 Sep 2022 în forum: Heritage Railways & Centres in the UK
  4. David Withers
    Post

    Piston and valve rings.

    Very nearly operating! Hydraulic exam passed and formal steam exam to come within the next few days, precisely 20 years since we started...
    Post de: David Withers, 20 Sep 2022 în forum: Steam Traction
  5. David Withers
    Post

    Piston and valve rings.

    A noteworthy exception to Steve's excellent post: Danish 0-6-0T No. 656 at Nene Valley Railway has slide valves carrying a pressure relief...
    Post de: David Withers, 20 Sep 2022 în forum: Steam Traction
  6. David Withers
    Post

    Tyre Flange Profiles

    Thanks yet again, Steve. Yes, I'm looking for problems -- to make sure they don't exist! It's the way I work. :) My engineering experience...
    Post de: David Withers, 25 Mar 2019 în forum: Locomotive Engineering M.I.C
  7. David Withers
    Post

    Tyre Flange Profiles

    I'm faced with another problem with the brake blocks. This isn't connected with the flange profiles but I'll post it here as an extension of the...
    Post de: David Withers, 25 Mar 2019 în forum: Locomotive Engineering M.I.C
  8. David Withers
    Post

    Tyre Flange Profiles

    I've been collecting information, drawings and documents on the class for 16 years, including a research visit to Denmark in 2005. However I'm...
    Post de: David Withers, 17 Mar 2019 în forum: Locomotive Engineering M.I.C
  9. David Withers
    Post

    Tyre Flange Profiles

    Though the 'wearing' part of each block is similar, you may be able to see that the leading block has a bigger hole and more meat around it. It...
    Post de: David Withers, 17 Mar 2019 în forum: Locomotive Engineering M.I.C
  10. David Withers
    Post

    Tyre Flange Profiles

    Good questions! The blocks on the driving and trailing wheelsets are mounted partway down hangers in an area with ample space. Those on the...
    Post de: David Withers, 16 Mar 2019 în forum: Locomotive Engineering M.I.C
  11. David Withers
    Post

    Tyre Flange Profiles

    Many thanks for coming to my rescue again, Steve! The document and your comments together should be all I need, fingers crossed. I wasn't...
    Post de: David Withers, 15 Mar 2019 în forum: Locomotive Engineering M.I.C
  12. David Withers
    Subiect

    Tyre Flange Profiles

    I'm preparing drawings of new brake blocks for the NVR's Danish 0-6-0T loco. These each have an extension that wraps over the tyre flange and...
    Subiect de: David Withers, 14 Mar 2019, 12 răspunsuri, în forum: Locomotive Engineering M.I.C
  13. David Withers
    Post

    Brake Block Specification

    That's very useful information about chilling, Steve. It reminds me (from 50 years ago!) that the camshaft lobes and rocker lever pads of our...
    Post de: David Withers, 22 Feb 2019 în forum: Steam Traction
  14. David Withers
    Post

    Brake Block Specification

    Thanks for your reply, Gary. I wonder if BR and/or IOW ever checked the tyre wear rate between different brake block compositions? Since asking...
    Post de: David Withers, 21 Feb 2019 în forum: Steam Traction
  15. David Withers
    Subiect

    Brake Block Specification

    I hope you're all having a good start to the new year, and best wishes for the rest of 2019. I understand that a high phosphorus content in cast...
    Subiect de: David Withers, 7 Ian 2019, 6 răspunsuri, în forum: Steam Traction
  16. David Withers
    Post

    Fire Bars

    That's very helpful indeed, Andy! Thanks very much. Though I'm very familiar with 'ordinary' cast irons, I'm a newcomer to firebars and...
    Post de: David Withers, 23 Dec 2018 în forum: Steam Traction
  17. David Withers
    Post

    Fire Bars

    I've found the answer to my question. Not good but not unexpected. A technical paper published on the internet states that "the inclusion of...
    Post de: David Withers, 22 Dec 2018 în forum: Steam Traction
  18. David Withers
    Post

    Fire Bars

    Thanks, but that's not what I was after. I'm looking into new chromium-iron bars for a Danish loco, and BR bars/patterns are out of the question....
    Post de: David Withers, 21 Dec 2018 în forum: Steam Traction
  19. David Withers
    Post

    Fire Bars

    Is it practicable to cut and drill chromium-iron bars? This would enable corner sets to be made from standard bars for the loco I'm working on,...
    Post de: David Withers, 20 Dec 2018 în forum: Steam Traction
  20. David Withers
    Post

    Fire Bars

    This has been a most interesting and potentially useful thread, newly discovered by me 18 months on! BS 4844 grade 3E cast iron has a 22-28%...
    Post de: David Withers, 30 Sep 2018 în forum: Steam Traction
  21. David Withers
    Post

    NER SNOWPLOUGH 18

    It looks really good, Bryan! You should be proud of what you have achieved, and I'm sure you are.
    Post de: David Withers, 26 Iul 2011 în forum: Heritage Rolling Stock
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