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LMS2968's Recent Activity

  1. LMS2968 replied to the thread Locomotive Performance and Tractive Effort Discussion.

    Which raises a point: the smokebox is bolted rigidly to the saddle and the boiler fitted to the rear of the smokebox while the firebox end is free to slide longitudinally, so if the smokebox is returned to the same engine, it all has to line up,...

    Dec 5, 2022 at 4:16 PM
  2. LMS2968 replied to the thread Locomotive Performance and Tractive Effort Discussion.

    I read somewhere that Swindon regarded the smokebox as another ring of the barrel. God knows why, but that might explain it.

    Dec 5, 2022 at 2:03 PM
  3. LMS2968 replied to the thread Locomotive Performance and Tractive Effort Discussion.

    Not at all, Simon. We don't agree and that's fair enough: that's what debate and this forum is about: making your case. I can't see where anyone has been 'aggressive'. I'll gladly bow to your knowledge of all things LNER, but I do know...

    Dec 5, 2022 at 10:13 AM
  4. LMS2968 replied to the thread Locomotive Performance and Tractive Effort Discussion.

    Dec 5, 2022 at 7:39 AM
  5. LMS2968 replied to the thread Locomotive Performance and Tractive Effort Discussion.

    Sorry Simon, but there would not be a pool of smokeboxes. There would be of boilers, generally up to 10% more boilers than engines, because boilers took longer to repair than engines, but smokeboxes were straight forward fabrications, easy and...

    Dec 5, 2022 at 7:00 AM
  6. LMS2968 liked Jamessquared's post in the thread Locomotive Performance and Tractive Effort Discussion.

    I’m not suggesting you wouldn’t remove the blast pipe during an overhaul - you’d need to do so in order to clear out accumulated coke. What I’m suggesting is that once refurbished, you’d return it to the same loco. Also, on terminology - I’d be...

    Dec 5, 2022 at 6:55 AM
  7. LMS2968 liked Steve's post in the thread Locomotive Performance and Tractive Effort Discussion.

    Are you sure? When a boiler entered works for overhaul one of the usual things to do was to remove the smokebox tubeplate. This both allowed access to the boiler innards and enabled a check for grooving, a problem quite common with tubeplates....

    Dec 4, 2022 at 8:05 PM
  8. LMS2968 replied to the thread Locomotive Performance and Tractive Effort Discussion.

    Amazing.

    Dec 4, 2022 at 6:26 PM
  9. LMS2968 replied to the thread Locomotive Performance and Tractive Effort Discussion.

    Nope, I quote the ex-streamlined Stanier Pacifics again: the original streamlined smokebox lasted on 6246 until May 1960. It had been de-streamlined in September 1946 so best part of fourteen years. In between, four different boilers were fitted....

    Dec 4, 2022 at 4:59 PM
  10. LMS2968 liked Jamessquared's post in the thread Locomotive Performance and Tractive Effort Discussion.

    I think it is probably unlikely that you would swap a blast pipe as part of a boiler swap, because fundamentally it's position, mounting etc is related to the cylinders, not the boiler. So if you don't disturb the cylinders in an overhaul, you...

    Dec 4, 2022 at 3:49 PM
  11. LMS2968 replied to the thread Locomotive Performance and Tractive Effort Discussion.

    I don't know if this applied also on the other Railways / Regions, but on the LMS, when a boiler was changed at overhaul, the smokebox and therefore the chimney arrangement, stayed with the engine and not the boiler. As evidence, I would point to...

    Dec 4, 2022 at 12:50 PM
  12. LMS2968 liked S.A.C. Martin's post in the thread Locomotive Performance and Tractive Effort Discussion.

    There is no "standardised LNER double kylchap" design. There's a good many slightly different iterations of this design, of which there are four generally similar types, as per below: Humorist had its own a version, which was modified...

    Dec 4, 2022 at 12:36 PM
  13. LMS2968 replied to the thread BR Standard class 6 No. 72010 'Hengist' and Clan Discussion Thread.

    I've read that too, but it went further. Because of the unreliability of the steam reverser, which tended to lengthen the cut off as the engine ran, drivers gave up trying to pull it back and ended up driving on the regulator, so the chances of...

    Nov 30, 2022
  14. LMS2968 liked 8126's post in the thread BR Standard class 6 No. 72010 'Hengist' and Clan Discussion Thread.

    The only reference I've read giving a specific reason for this is Winkworth's 'Bulleid's Pacifics' which states (on page 26 in my copy): "Reduction in boiler pressure from 280 to 250 lb per sq in was commenced in March 1954, permitting a standard...

    Nov 30, 2022