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  1. RAB3L
    مشاركة

    76077

    Crown stays have to be steel because of the length. The crown stays nearest to the seams have to be riveted rather than nutted to allow access to...
    المشاركة بواسطة: RAB3L, ‏29 ماي 2025 في منتدى: Steam Traction
  3. RAB3L
    مشاركة

    76077

    At this stage, they would probably be smaller pilot holes which would be enlarged later for tapping.
    المشاركة بواسطة: RAB3L, ‏29 ماي 2025 في منتدى: Steam Traction
  4. RAB3L
    مشاركة

    76077

    6106 certainly has Monel stays but the GWS haven't used Monel stays since, to my knowledge. It's tough stuff to machine! The Bluebell Railway's Q...
    المشاركة بواسطة: RAB3L, ‏29 ماي 2025 في منتدى: Steam Traction
  5. RAB3L
    مشاركة

    71000

    Probably easier than oiling up a Castle without a pit, Ian? Bold!
    المشاركة بواسطة: RAB3L, ‏29 ماي 2025 في منتدى: Steam Traction
  6. RAB3L
    مشاركة

    76077

    The change from steel to copper occurs at about 3/4" dia. Above this, the poor conductivity of steel means that they just erode away. For Monel,...
    المشاركة بواسطة: RAB3L, ‏29 ماي 2025 في منتدى: Steam Traction
  7. RAB3L
    مشاركة

    Locomotives Preserved at Butlins Holiday Camps

    46100 is ex-Skegness. It is actually No. 6152 The King's Dragoon Guardsman with which it swapped identity in 1933 because of an upcoming visit to...
    المشاركة بواسطة: RAB3L, ‏10 ماي 2025 في منتدى: Steam Traction
  8. RAB3L
    مشاركة

    Bluebell Motive Power

    Not quite true. SNCF found it advantageous to remove syphons from 141Rs but found the reverse with 141Ps. Most (if not all) surviving 141Rs still...
    المشاركة بواسطة: RAB3L, ‏25 إبريل 2025 في منتدى: Steam Traction
  9. RAB3L
    مشاركة

    Electronics

    A heat pipe with a fan is probably more suitable, as used for most (all?) computer processors. A Peltier is much less efficient but has the...
    المشاركة بواسطة: RAB3L, ‏22 إبريل 2025 في منتدى: Steam Traction
  10. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    Franklin's penultimate valve gear project also ended in failure, although, again it wasn't due to the company. C&O had had good results with Type...
    المشاركة بواسطة: RAB3L, ‏18 إبريل 2025 في منتدى: Steam Traction
  11. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    Except that poppet valve gear's main advantage is at high speed which the P2 was not intended for. In France, where passenger trains at the time...
    المشاركة بواسطة: RAB3L, ‏16 إبريل 2025 في منتدى: Steam Traction
  12. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    The problem with all these Franklin designs is that they appeared at the end of steam in the USA and therefore their use was very limited....
    المشاركة بواسطة: RAB3L, ‏16 إبريل 2025 في منتدى: Steam Traction
  13. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    The cam is part no 55a in sheet 4 of US2441199A.
    المشاركة بواسطة: RAB3L, ‏28 مارس 2025 في منتدى: Steam Traction
  14. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    Taper is probably the wrong description. Franklin B is probably analogous to automotive VTEC as here:...
    المشاركة بواسطة: RAB3L, ‏28 مارس 2025 في منتدى: Steam Traction
  15. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    For completeness, here are the patent details for Franklin A: Drive system: US2183327A.pdf Reverse Gear: US2385957A.pdf Just out of interest,...
    المشاركة بواسطة: RAB3L, ‏28 مارس 2025 في منتدى: Steam Traction
  16. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    No, I couldn't see any obvious taper. I'll have another look tomorrow - too late tonight!
    المشاركة بواسطة: RAB3L, ‏28 مارس 2025 في منتدى: Steam Traction
  17. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    There is a difference. For the Franklin files, Google doesn't download, presumably just because it is http and not https. I just used the address...
    المشاركة بواسطة: RAB3L, ‏28 مارس 2025 في منتدى: Steam Traction
  18. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    Maybe but I had the same issue with downloading a motor insurance certificate today which definitely was https and I could see that the file had...
    المشاركة بواسطة: RAB3L, ‏27 مارس 2025 في منتدى: Steam Traction
  19. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    This might be what you are looking for: US2441199A.pdf This is the drive system. US2441156A.pdf This shows the valve arrangement. This is the...
    المشاركة بواسطة: RAB3L, ‏27 مارس 2025 في منتدى: Steam Traction
  20. RAB3L
    مشاركة

    Tornado

    I think you will find that the original boiler is still on the loco because, at the time, it required less time to get to a working condition than...
    المشاركة بواسطة: RAB3L, ‏23 مارس 2025 في منتدى: Steam Traction
  21. RAB3L
    مشاركة

    P2 Locomotive Company and related matters

    I found this from here: https://prr.groups.io/g/PRR/topic/t1_poppet_valve_issues/90638011 'Reviewing the correspondence of the day suggests that...
    المشاركة بواسطة: RAB3L, ‏21 مارس 2025 في منتدى: Steam Traction
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