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  1. Allegheny
    Post

    Steam speed records including City of Truro and Mallard

    This is probably a red-herring, but there can be an effect when dealing with sampled data known as "aliasing". Among other things it occasionally...
    Post by: Allegheny, Dec 20, 2023 in forum: Steam Traction
  3. Allegheny
    Post

    Steam speed records including City of Truro and Mallard

    Fix It Again Tomorrow
    Post by: Allegheny, Dec 14, 2023 in forum: Steam Traction
  4. Allegheny
    Post

    Steam speed records including City of Truro and Mallard

    I would challenge anyone to come up with an alternative practical design with effectively eight chimneys!
    Post by: Allegheny, Dec 14, 2023 in forum: Steam Traction
  5. Allegheny
    Post

    Steam speed records including City of Truro and Mallard

    If this is the argument about a multiple chimney being better than a single chimney (where required) I agree entirely with you. I've also...
    Post by: Allegheny, Dec 14, 2023 in forum: Steam Traction
  6. Allegheny
    Post

    Steam speed records including City of Truro and Mallard

    I've always been curious about why a Kylchap works better than some of the alternatives. Would it be fair to say that you have a large mass of...
    Post by: Allegheny, Dec 13, 2023 in forum: Steam Traction
  7. Allegheny
    Post

    92134

    I'm just wondering if there would be anything to gained by testing an axle counter with a 9F on a heritage railway, just to see how consistently...
    Post by: Allegheny, Dec 5, 2023 in forum: Steam Traction
  8. Allegheny
    Post

    Chapelon and related Matters

    I'm enjoying reading this thread. Would you consider Porta and Wardale to be more "practical" engineers (whatever that means) than Chapelon?
    Post by: Allegheny, Nov 3, 2023 in forum: Steam Traction
  9. Allegheny
    Post

    Overhead DC electrification - a potential solution to the conundrum of EMUs?

    Could you run these on the Isle of Wight electric railway? - apart from through the tunnel.
    Post by: Allegheny, Sep 22, 2023 in forum: Diesel & Electric Traction
  10. Allegheny
    Post

    60019 Bittern

    Good idea! Forget the troublesome steam engine and use a Diesel instead:).
    Post by: Allegheny, Jun 15, 2023 in forum: Steam Traction
  11. Allegheny
    Post

    60019 Bittern

    Clearly the second tender has previously been used by Flying Scotsman, so presumably it could be used by any locomotive with the appropriate water...
    Post by: Allegheny, Jun 15, 2023 in forum: Steam Traction
  12. Allegheny
    Post

    60019 Bittern

    To be fair, braking when running light engine also needs to be considered.
    Post by: Allegheny, Jun 15, 2023 in forum: Steam Traction
  13. Allegheny
    Post

    60019 Bittern

    Adding a rear water connection to the second tender so it could run either way round doesn't sound like too big a modification, or is it more...
    Post by: Allegheny, Jun 15, 2023 in forum: Steam Traction
  14. Allegheny
    Post

    60019 Bittern

    With the proposed overhaul of Bittern, I was just wondering what the current status of the second tender is, and whether some work would be...
    Post by: Allegheny, Jun 14, 2023 in forum: Steam Traction
  15. Allegheny
    Post

    A2 60532 Blue Peter

    I think if Bittern and SNG are running at the same time, it would be good to have them in different liveries.
    Post by: Allegheny, Jun 13, 2023 in forum: Steam Traction
  16. Allegheny
    Post

    A2 60532 Blue Peter

    Would that apply to Bittern?
    Post by: Allegheny, Jun 13, 2023 in forum: Steam Traction
  17. Allegheny
    Post

    A2 60532 Blue Peter

    I remembered that the A2s had a relatively high figure for tractive effort, and although TE isn't a reliable indicator of power, I thought I'd...
    Post by: Allegheny, Jun 12, 2023 in forum: Steam Traction
  18. Allegheny
    Post

    Strathspey Railway

    A 9F will be useful when they extend the line over Dava Moor.:)
    Post by: Allegheny, Jun 1, 2023 in forum: Heritage Railways & Centres in the UK
  19. Allegheny
    Post

    Boiler dimensions/ratios

    I've always been a bit puzzled by water circulation in boilers. It is occasionally mentioned in the discussion of boiler design, and power station...
    Post by: Allegheny, May 25, 2023 in forum: Steam Traction
  20. Allegheny
    Post

    Current and Proposed New-Builds

    I imagine one of these could be quite useful on some heritage lines. LNWR DX Goods class - Wikipedia Presumably simple and well sorted.
    Post by: Allegheny, May 4, 2023 in forum: Steam Traction
  21. Allegheny
    Post

    Locomotive Performance and Tractive Effort Discussion

    As a 2-10-0 with flangeless centre drivers, Dame Vera won't get to Whitby.
    Post by: Allegheny, Apr 27, 2023 in forum: Steam Traction
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