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Sir Nigel Gresley - The L.N.E.R.’s First C.M.E.

Discussion in 'Steam Traction' started by S.A.C. Martin, Dec 3, 2021.

Page 97 of 97
  1. osprey

    osprey Resident of Nat Pres

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    Well you'll have to be more thick skinned if you post comments like yours and expect no comeback. My remark was based on your avatar "Osmium"...it seemed strange
     
    osprey, Mar 21, 2026 at 7:58 PM
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  2. Osmium

    Osmium New Member

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    ——
     
    Last edited: Mar 21, 2026 at 11:53 PM
    Osmium, Mar 21, 2026 at 8:21 PM
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  3. Jimc

    Jimc Part of the furniture

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    All sorts of things will work to a greater or lesser extent. Cost effectiive might be another matter. I suspect though, if you managed to train your shed staff to the level where they could successfully maintain high pressure hydraulics, it might be easier to drive all the valves directly from cams rather than have a derived gear from two sets of walschaerts. But at that point one starts thinking about poppet valves and and and...
     
    Jimc, Mar 21, 2026 at 8:49 PM
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  4. johnofwessex

    johnofwessex Resident of Nat Pres

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    The LNER did try poppet valves the surviving B12 8572 being one of them.

    While the Lentz fitted B12's were not a success the 'Shires' were so perhaps Lentz rather than Conjugated was the way the LNER should have gone.
     
    johnofwessex, Mar 22, 2026 at 9:36 AM
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