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  1. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    (Also, on a side note, I am actually grateful that Cecil J Allen was not on the train. I do not have the confidence of his recording skills nor...
    Сообщение от: S.A.C. Martin, 30 ноя 2023 в разделе: Steam Traction
  3. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    Hi Michael, I have also hesitated to respond to your post. Are you writing from secondary evidence on this or do you have a copy of the...
    Сообщение от: S.A.C. Martin, 30 ноя 2023 в разделе: Steam Traction
  4. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    Facilitated? Or under cover of…internal LNER documents definitely suggest it was the latter!
    Сообщение от: S.A.C. Martin, 30 ноя 2023 в разделе: Steam Traction
  5. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    A bit selective there Tom, I did say: My point being exactly what you are saying - the average speeds and point to point timings do matter, not...
    Сообщение от: S.A.C. Martin, 30 ноя 2023 в разделе: Steam Traction
  6. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    But then you are going, I assume, on average speeds achieved over the distance for the Cheltenham Flyer, rather than any absolute speeds, which I...
    Сообщение от: S.A.C. Martin, 30 ноя 2023 в разделе: Steam Traction
  7. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    Legend, thank you.
    Сообщение от: S.A.C. Martin, 30 ноя 2023 в разделе: Steam Traction
  8. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    As I recall, Gresley borrowed the LMS one to calibrate the NER one. It turned out the LMS one was not calibrated properly. I need to go and check...
    Сообщение от: S.A.C. Martin, 30 ноя 2023 в разделе: Steam Traction
  9. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    So things to consider for any discussion of the Mallard run: Positive factors: Short formed train (six twins plus one dynamometer car)...
    Сообщение от: S.A.C. Martin, 29 ноя 2023 в разделе: Steam Traction
  10. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    I think though we see it as a mistake now because we are better informed. They were pioneering wind tunnel testing and development. Of course...
    Сообщение от: S.A.C. Martin, 29 ноя 2023 в разделе: Steam Traction
  11. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    I think for the purposes of this thread, it is better to focus on the train based research.
    Сообщение от: S.A.C. Martin, 29 ноя 2023 в разделе: Steam Traction
  12. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    I feel there’s a need to separate out the understanding of aircraft and trains. One of the reasons why the NPL tests are significant is that...
    Сообщение от: S.A.C. Martin, 29 ноя 2023 в разделе: Steam Traction
  13. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    Hi Jim. I enjoyed your pun. That gave me a chuckle. I agree it's a failure of the equipment. But we should be exploring all avenues and at least...
    Сообщение от: S.A.C. Martin, 28 ноя 2023 в разделе: Steam Traction
  14. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    Thank you for this. I need to point out that even on the LNER they never assumed the whip in the centre cylinder gave more than 10% than the...
    Сообщение от: S.A.C. Martin, 28 ноя 2023 в разделе: Steam Traction
  15. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    No, it does not. What it shows is a series of five second intervals for which the average speeds over those five second intervals were taken,...
    Сообщение от: S.A.C. Martin, 28 ноя 2023 в разделе: Steam Traction
  16. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    There is one mechanical feature about the A4 Pacific that seems to have been forgot about, but is well known and is even claimed by members within...
    Сообщение от: S.A.C. Martin, 27 ноя 2023 в разделе: Steam Traction
  17. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    Yes indeed, that is the point.
    Сообщение от: S.A.C. Martin, 27 ноя 2023 в разделе: Steam Traction
  18. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    Precisely.
    Сообщение от: S.A.C. Martin, 27 ноя 2023 в разделе: Steam Traction
  19. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    Hi Michael, You’ll appreciate that I have the actual roll in front of me. On that I think I’ll leave it. Best wishes Simon
    Сообщение от: S.A.C. Martin, 27 ноя 2023 в разделе: Steam Traction
  20. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    There’s no “if”. And that is precisely what I am doing with it.
    Сообщение от: S.A.C. Martin, 27 ноя 2023 в разделе: Steam Traction
  21. S.A.C. Martin
    Сообщение

    Steam speed records including City of Truro and Mallard

    I stand corrected on that point. Nope. That’s just what has been reported by secondary sources. The actual dyno roll shows Mallard continued...
    Сообщение от: S.A.C. Martin, 26 ноя 2023 в разделе: Steam Traction
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