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  1. 242A1
    Post

    4920 Dumbleton Hall

    There exists a replica of Hill Top in Japan and it can be found in Saitama Children's Zoo which is about one hour from Tokyo. In the aftermath...
    Post by: 242A1, Jan 14, 2022 in forum: Steam Traction
  3. 242A1
    Post

    GWR 111 "The Great Bear" and Surrounding Controversies

    Some designers made something of a specialisation of rebuilding existing designs into something which would match or out-perform newer and larger...
    Post by: 242A1, Jan 12, 2022 in forum: Steam Traction
  4. 242A1
    Post

    GWR 111 "The Great Bear" and Surrounding Controversies

    The Journal of the Institution of Locomotive Engineers Volume 20 Journal No. 93 Paper 253 is worth glancing through with respect to the thinking...
    Post by: 242A1, Jan 12, 2022 in forum: Steam Traction
  5. 242A1
    Post

    GWR 111 "The Great Bear" and Surrounding Controversies

    The Missouri Pacific P69 class were built by Alco-Brooks and date from 1902 and they lasted rather well with the last being withdrawn from service...
    Post by: 242A1, Jan 12, 2022 in forum: Steam Traction
  6. 242A1
    Post

    S&D Railway Trust

    The S. & D. 7Fs were known for cylinder lubrication issues, "unearthly groaning noises emanating from the cylinders" have been referred to (some...
    Post by: 242A1, Dec 29, 2021 in forum: Heritage Railways & Centres in the UK
  7. 242A1
    Post

    60007 (4498) Sir Nigel Gresley Overhaul

    Liquids are usually thought of as being incompressible. They can be compressed but it takes a great deal of energy and you achieve very little...
    Post by: 242A1, Dec 21, 2021 in forum: Steam Traction
  8. 242A1
    Post

    Driving a compound locomotive

    Somewhere in my souvenirs I have a reference to the port area of both the 8" and the 9" piston valves. I am unable to find it at the moment but I...
    Post by: 242A1, Nov 26, 2021 in forum: Steam Traction
  9. 242A1
    Post

    Driving a compound locomotive

    I agree with you that the valves look to be on the small side and we do not know the area of the port openings either. We can be sure that no...
    Post by: 242A1, Nov 26, 2021 in forum: Steam Traction
  10. 242A1
    Post

    Driving a compound locomotive

    Chapelon used 80% HP cut off associated with 50% LP cut off in 242A1. Consider the swept volume of the cycle. In 10000 when fitted with 10" bore...
    Post by: 242A1, Nov 22, 2021 in forum: Steam Traction
  11. 242A1
    Post

    Driving a compound locomotive

    Marty used to be a stoker on torpedo boats but it is said that he preferred working in the open air hence his appearance on the railways. A one...
    Post by: 242A1, Nov 22, 2021 in forum: Steam Traction
  12. 242A1
    Post

    Driving a compound locomotive

    You shouldn't need two firemen. If you have sufficiently low specific steam consumption figures then the demands made of the boiler are less, you...
    Post by: 242A1, Nov 22, 2021 in forum: Steam Traction
  13. 242A1
    Post

    Driving a compound locomotive

    The first batch of Chapelon 4-8-0 compounds had a grate area of 40.47 sq. ft, a little less than the 41.25 sq. ft of the Gresley Pacifics and...
    Post by: 242A1, Nov 22, 2021 in forum: Steam Traction
  14. 242A1
    Post

    Driving a compound locomotive

    Essentially just handle, that is to say drive, the locomotive correctly. The issue with the steam supply to the auxiliaries, particularly the...
    Post by: 242A1, Nov 21, 2021 in forum: Steam Traction
  15. 242A1
    Post

    Driving a compound locomotive

    The LNER 4-6-4 had a proposed arrangement for the Superheater between the HP and LP cylinders produced in 1933, this was drawing number 15542....
    Post by: 242A1, Nov 20, 2021 in forum: Steam Traction
  16. 242A1
    Post

    Driving a compound locomotive

    Another small chapter in the ongoing sagas of the Civils vs the Mechanicals.
    Post by: 242A1, Nov 20, 2021 in forum: Steam Traction
  17. 242A1
    Post

    Driving a compound locomotive

    The 160A1 provided not only good performance results but it was also used to examine the real value of the interstage superheater in conjuction...
    Post by: 242A1, Nov 20, 2021 in forum: Steam Traction
  18. 242A1
    Post

    Driving a compound locomotive

    You need to have sufficient steam flow into the receiver for the l.p. unit to develop its share of a contribution, the h.p. side cannot be allowed...
    Post by: 242A1, Nov 18, 2021 in forum: Steam Traction
  19. 242A1
    Post

    Driving a compound locomotive

    I was in contact with John Startin in 2014 and he was of the opinion that the K1 was a work in progress. The valve gears are linked to the same...
    Post by: 242A1, Nov 18, 2021 in forum: Steam Traction
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