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242A1's Recent Activity

  1. 242A1 replied to the thread P2 Locomotive Company and related matters.

    The route over the "threshold of Burgundy"from Laroche to Dijon is around 83 miles and contains long sections of 1:125 and is a part of the old PLM. It was one of the trial or testing grounds of the French railways a difficult and challenging...

    Nov 28, 2022 at 11:47 PM
  2. 242A1 replied to the thread P2 Locomotive Company and related matters.

    Thank you for doing some work on this and I agree with you. The GL is unlikely to have achieved 3,000ihp and cannot help but wondering if punters wagered their shirt on the tractive effort horse.

    Nov 28, 2022 at 10:43 PM
  3. 242A1 liked torgormaig's post in the thread P2 Locomotive Company and related matters.

    Here is the preserved D57, 5711, at Valley Heights Museum in 2009 showing the exposed but very robust conjugated valve gear:-[ATTACH] [ATTACH] Peter

    DSCF5904_edited.jpg DSCF5911 copy_edited-1.jpg Nov 28, 2022 at 10:33 PM
  4. 242A1 replied to the thread P2 Locomotive Company and related matters.

    Hello there. It took me a while to step outside what we might refer to as UK thinking and I did start the journey many years ago. Chapelon observed that the Rankine Theory did not appear to predict what he could achieve in practice, no matter,...

    Nov 28, 2022 at 10:31 PM
  5. 242A1 replied to the thread P2 Locomotive Company and related matters.

    You are being too conservative here. 40.5 sq ft of grate is adequate for 4,000 ihp continuous output. The UK loading gauge might present some limitations but 2,000 hp worth?

    Nov 28, 2022 at 8:52 PM
  6. 242A1 replied to the thread P2 Locomotive Company and related matters.

    242A1 had a grate area of 53.81 sq ft and could sustain 5,500 ihp and over 4,200 tender dbhp. So you are saying that the Cape Gauge Garratt should achieve what exactly? 5463 dbhp? All things are not equal. Railways are forced to use larger grate...

    Nov 28, 2022 at 8:45 PM
  7. 242A1 replied to the thread P2 Locomotive Company and related matters.

    The South African Class GL. Weight is given as 211 tons 1cwt or 214 tons 2 cwt and it was built to Cape Gauge (3' 6") and the design dates from the 1920s. What is the design's power output? Remember this is a freight locomotive with 48" driving...

    Nov 28, 2022 at 3:19 PM
  8. 242A1 replied to the thread P2 Locomotive Company and related matters.

    The quality of the exhaust system is more important when all other factors are nominally equal. You point out the steam generation of Tornado and there is nothing to suggest that it cannot equal a MN, Duke or Princess Coronation if required to do...

    Nov 26, 2022 at 11:37 PM
  9. 242A1 replied to the thread P2 Locomotive Company and related matters.

    It is quite hard to avoid the impression that some whose loyalties and affections lie with other companies and regions are wishing that this project had never started. 43,684 lbs tractive force, 80 tons adhesive weight and 3,400 hp are all...

    Nov 26, 2022 at 4:00 PM
  10. 242A1 replied to the thread P2 Locomotive Company and related matters.

    The restoration/overhaul of 231E41 has recently involved the stripping down of the poppet valves and cams. Though this engine has oscillating cam drive rather than the rotating drive to be fitted to the Franklin/Lentz of the P2 the components...

    Nov 24, 2022 at 9:04 AM