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Rebuilt Patriot and Rebuilt Scot

Discussion in 'Steam Traction' started by andrewshimmin, Nov 1, 2014.

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  1. JJG Koopmans

    JJG Koopmans Member

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    There is one available both on Ebay and Abebooks. If it would help the discussion, Clarke shows outline diagrams in his book on the rebuilts, it says 5' 5" for the smallest diameter of the 2A boiler. Blastpipe (2) 3.75 in. ea., 2' 4.125" distance to choke, choke diameters 11,25 in. ea., chimneys taper 1:14, length 2' 8.875" , exit diameter 1' 1.28125". All ok except the distance to the choke, the ratio =28.125/3.75=7.5 which is too large and gives a sluggish locomotive with lower loads.
    kind regards
    Jos Koopmans
     
    JJG Koopmans, Jan 9, 2015
    #81
  2. S.A.C. Martin

    S.A.C. Martin Part of the furniture

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    Who specifically? There seems to have been a number of members of the engineering team who had a hand in the W1 near the end of its original life, and as rebuilt (including one E. Thompson who you seem to have singled out for criticism on this point - correct me if I am wrong).

    I've no problem with the idea that Thompson was an inferior locomotive engineer to Chapelon (happy to acknowledge that fact) but surely all of the other engineers in Britain at the time were also guilty of not being on Chapelon's level in that manner?

    Gresley and Chapelon collaborated a number of times and Gresley had direct access to many of Chapelon's facilities with the P2. If the A4 was not as good as it could have been in the 30s in terms of horsepower output, is that not Gresley's fault in many respects (bearing in mind the limited resources Thompson and Peppercorn had to deal with during and post WW2 - would they really have been able to develop their designs to the same extent Chapelon was able to? The LNER in particular during the war and post war seemed a much stricter regime at the top level in terms of experimental development).
     
    S.A.C. Martin, Jan 9, 2015
    #82
  3. class8mikado

    class8mikado Part of the furniture

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    Thanks for the Information and opinion Mr Koopmans, precisely what i needed to know. External Height above the smokebox being the only thing missing
     
    Last edited: Jan 9, 2015
    class8mikado, Jan 9, 2015
    #83
  4. JJG Koopmans

    JJG Koopmans Member

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    If you care to Google for "LMS 2A boiler" you will get some references including one for the Google scanned Clarke book.
    Page 1946 and 1953 (???) show outlines with dimensions, and a printscreen could give you some info. Buying the book
    would be the safest of course.
    Kind regards
    Jos Koopmans
     
    JJG Koopmans, Jan 9, 2015
    #84
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