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21B's Recent Activity

  1. 21B replied to the thread North Yorkshire Moors Railway General Discussion.

    I suspect that the reason that copper fireboxes may not last as long when oil fired is related to the fact that oil burns hotter than coal and copper melts at a lower temperature than steel. That suggests that you would expect the surface of a...

    Jul 24, 2026 at 7:06 PM

  2. 21B liked Jamessquared's post in the thread North Yorkshire Moors Railway General Discussion.

    I guess it is not beyond the realms of possibility that, given it is early days, crews are still finding the most efficient way to fire the loco, so conceivably costs are higher now than they might ultimately be. But (assuming the "12 tons of...

    Jul 24, 2026 at 1:29 PM
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