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The 'Ghost' A3 Salmon Trout

Discussion in 'Steam Traction' started by D6332found, Jan 25, 2023.

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  1. Jamessquared

    Jamessquared Nat Pres stalwart

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    MLS? (Apologies if this has been explained before).

    Tom
     
    Jamessquared, Jan 27, 2023
    #21
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  2. S.A.C. Martin

    S.A.C. Martin Part of the furniture

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    Acronym for the multi-valve regulator system used on Blue Peter, four other A2s and the Britannias.

    [​IMG]
     
    S.A.C. Martin, Jan 27, 2023
    #22
  3. ianh

    ianh Member

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    ianh, Jan 27, 2023
    #23
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  4. S.A.C. Martin

    S.A.C. Martin Part of the furniture

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    S.A.C. Martin, Jan 27, 2023
    #24
  5. Steve

    Steve Resident of Nat Pres Friend

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    As has been said, MeLeSco was the trademark for the Superheater Co who produced the multiple valve regulator, amongst other things IMG_0451.JPG . Not sure where the name came from, though.
     
    Steve, Jan 27, 2023
    #25
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  6. S.A.C. Martin

    S.A.C. Martin Part of the furniture

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    You’ve driven BP Steve - what do you make of the MLS setup compared to a conventional regulator setup?

    (I may have asked this before, my apologies. Cannot remember!)
     
    S.A.C. Martin, Jan 27, 2023
    #26
  7. ianh

    ianh Member

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    Did Swindon Licence the Melesco superheater for the 3 and 4 row headers as used on the later Castles? - I know they kept the standard GWR regulator valve..
     
    ianh, Jan 27, 2023
    #27
  8. Steve

    Steve Resident of Nat Pres Friend

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    Don't know about the Castles but the front page of the MeleSco maintenance manual that I illustrated in my previous post shows a photo of GWR 1000 County of Middlesex so it is quite likely.
     
    Steve, Jan 27, 2023
    #28
  9. ianh

    ianh Member

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    The later Castles with the No8 HC (3 row) and No8 HD (4 row) - the 69XX and 79XX had a 3 row, the 60xx had a 4 row No12WB

    interestingly the GWR drawings make no reference to Meleso in the discriptions

    118297C 1943/01/16 Details of superheater elements (combined regulator and header)
    133225 1953/12/xx BR Western Region combined regulator valve body & no 4 type superheater for standard boiler no 15/08
    124845 1947/05/xx 1957/02/12 Combined Regulator Valve Body and 4 row Superheater header Standard Boiler no 12, Preface WB

    and a note about 4160 from the SVR forum ;

    This loco is a rather interesting survivor as it carries a GW No 2 boiler with BR STD type Melesco superheaters rather than the conventional BR(W) ones. As such it is one of only 2 (?) survivors of this type (5668 is similarly fitted) and the difference will be immediately apparent to anybody looking inside the smokebox when compared to 5164 or 4150.
    A number of No 1 boilers were similarly fitted with several surviving on preserved Halls or Modified Halls.
     
    ianh, Jan 27, 2023
    #29
  10. Jimc

    Jimc Part of the furniture

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    I can't lay my hands on it right now but I've seen a WR drawing/paper listing boiler types which referred to all the 3 and 4 row boilers as having Melesco headers.
     
    Jimc, Jan 27, 2023
    #30
  11. huochemi

    huochemi Part of the furniture

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    huochemi, Jan 27, 2023
    #31
  12. Steve

    Steve Resident of Nat Pres Friend

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    Steve, Jan 27, 2023
    #32
  13. 61624

    61624 Part of the furniture

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    What was different about Melesco superheaters? I always thought it was how they were attached to the header (ball and socket joint clamped together rather than the s/h tube expanded into the header). Were there any other differences/
     
    61624, Jan 28, 2023
    #33
  14. huochemi

    huochemi Part of the furniture

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    The superheaters (and multiple valve regulators) are described in detail in their various booklets see e.g. http://users.fini.net/~bersano/engl...glais/NZ-accessories/Melesco_superheaters.pdf. I would guess that most of the company's business was supplying the total package - fully finished elements (they were particularly proud of their forged return bends and ball joint seating), support clips to hold the elements centrally in the flues, the header, all the clamps/bolts, maintenance tools etc. They had a big works in the UK at Trafford Park.
     
    huochemi, Jan 28, 2023
    #34
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