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S.A.C. Martin's Recent Activity

  1. S.A.C. Martin replied to the thread Steam speed records including City of Truro and Mallard.

    But ultimately irrelevant. If you believe the ninth wheel records every mile travelled, and the chronograph records onto the paper every second, and these two machines are reasonably accurate and are working separately, but simultaneously, then...

    Feb 25, 2026 at 12:21 PM

  2. S.A.C. Martin replied to the thread Steam speed records including City of Truro and Mallard.

    Find me one steam locomotive speed record where it was dead level, with a run done in either direction. I’ll wait. Here we go…;) Which ones do you think are “contenders” then? Achieving 100mph with a steam locomotive (particularly with...

    Feb 25, 2026 at 12:09 PM

  3. S.A.C. Martin replied to the thread Steam speed records including City of Truro and Mallard.

    “New evidence” - quite! Old evidence reinterpreted, though I know of a third researcher doing their own analysis and I delight in knowing that between David, myself and the third researcher, we have disproven, confirmed, and then disproven by...

    Feb 24, 2026 at 6:56 PM

  4. S.A.C. Martin liked blink bonny's post in the thread Steam speed records including City of Truro and Mallard.

    I watched that last night. Very interesting, but I had one niggle. While I'm not arguing that the spikes on the graph are definitely worth consideration, there was one aspect of the distance measuring that seemed to be overlooked. He mentioned...

    Feb 24, 2026 at 6:53 PM

  5. S.A.C. Martin replied to the thread Steam speed records including City of Truro and Mallard.

    This is pure theatre for the purpose of building a T1, to be frank. There are virtually no sections of track in the United States safe enough for the running of a steam locomotive above 75mph let alone 100mph. That doesn’t mean I don’t want to...

    Feb 24, 2026 at 6:52 PM

  6. S.A.C. Martin replied to the thread Steam speed records including City of Truro and Mallard.

    Background: David Andrews and I both bought a load of ex-LNER dynamometer rolls over the last two years (he has subsequently donated his, post his research, as I intend to once my ongoing research is complete). I have a meeting this Friday to...

    Feb 24, 2026 at 6:50 PM
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