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Draughting arrangements for Bulleid Pacifics including the Giesl ejector

本贴由 jamesd 于 2014-10-14 发布. 版块名称: Steam Traction

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  1. Jamessquared

    Jamessquared Nat Pres stalwart

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    On the crosswind issue: I wonder whether the fact that the South West mainline in particular was laid basically along the line of the prevailing wind meant in practice it wasn’t a significant issue - maybe putting the locos on the ECML of WCML that run more at right angles to the prevailing wind would have been more problematic?

    (This might be better discussed in the dedicated 35011 thread).

    Tom
     
    Jamessquared, 2021-04-12
    #361
  2. Big Al

    Big Al Nat Pres stalwart Staff Member Moderator

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    I wish you well. Sadly you will find that the cost of meeting main line specifications - OTMR/TPWS etc - will be eye watering although given the total cost possibly not so intimidating. And then there is the need for air brakes.
    Surprised that you believe deflectors are necessary. I can understand design/aesthetic reasons but was unaware of any necessity. Better tell all Class 5 owners. :)
     
    Big Al, 2021-04-12
    #362
  3. fergusmacg

    fergusmacg Resident of Nat Pres

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    But black fives don't have oversized chimneys that result in lower velocity steam/smoke at the chimney lip - I'm getting that Déjà vu feeling again . . . . nurse I need help!
     
    fergusmacg, 2021-04-12
    #363
  4. Allegheny

    Allegheny Member

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    Sounds like the rebuilts were overdraughted. Good luck to Steve Rapley in sorting this out.:)
     
    Allegheny, 2021-04-12
    #364
  5. Allegheny

    Allegheny Member

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    Ribblehead viaduct might be interesting at times.:)
     
    Allegheny, 2021-04-12
    #365
  6. JJG Koopmans

    JJG Koopmans Member

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    Please, don't! Draughting and vision impairment are interconnected this time!
    Kind regards
    Jos
     
    JJG Koopmans, 2021-04-12
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  7. srapley

    srapley New Member

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    They're necessary for an air-smoothed MN...
     
    srapley, 2021-04-12
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  8. srapley

    srapley New Member

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    They had the same orifices as the original, the size Jos gave is correct for original and rebuilt. The exhaust was the part which changed fundamentally.
     
    srapley, 2021-04-12
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  9. class8mikado

    class8mikado Part of the furniture

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    Class 5's have quite a ' sharp' draught, this is particularly evident on the Caprotti ones, so much so that a double chimney was already on the drawing board - perhaps with that on they would have needed smoke deflectors too...
     
    class8mikado, 2021-04-12
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  10. Big Al

    Big Al Nat Pres stalwart Staff Member Moderator

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    Yes and I apologise for continuing the discussion. As I said, I wish the project well and for an enthusiast/historian it will be good to see a locomotive in air smoothed casing with a number that starts 35xxx. But for anyone interested in steam locomotives in general I really can't see that if it ends up looking like the lovely image you posted in #357 it will have any more public appeal than 34067 or 34072, for example. Express passenger blue - maybe but that's not a draughting matter.
     
    Big Al, 2021-04-12
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  11. 30854

    30854 Resident of Nat Pres

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    Blue's far more aerodynamic than green. C'mon .... Mallard and XP64 proved that years ago. Why else do you suppose BR went for it big time? o_O
     
    30854, 2021-04-12
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  12. class8mikado

    class8mikado Part of the furniture

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    Everyone knows that putting stripes on makes things go faster as well...
     
    class8mikado, 2021-04-12
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  13. martin1656

    martin1656 Nat Pres stalwart Friend

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    Got to be Post war Malachite green with yellow lines and sunshine lettering
     
    martin1656, 2021-04-12
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  14. 30854

    30854 Resident of Nat Pres

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    Could you imagine 21C11* crossing Grosvenor Bridge, trailing a rake of Pullmans, complete with Golden Arrow insignia?

    *If what I've read is correct, 21C11/35011 was a Nine Elms loco in it's early years and was one which never carried BR 'Express Blue'
     
    30854, 2021-04-12
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  15. srapley

    srapley New Member

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    Correct, it was one of three MNs to not be painted blue
     
    srapley, 2021-04-12
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  16. Allegheny

    Allegheny Member

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    If you were really keen, you would make it tilt when it goes round curves.
     
    Allegheny, 2021-04-12
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  17. MellishR

    MellishR Resident of Nat Pres Friend

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    I fear that the timescale for GSN is likely to extend beyond my lifetime. I have controbuted small amounts to several projects but substantial amounts only to projects that have since been completed or that can reasonably be expected to be completed within a few years.
     
    MellishR, 2021-04-12
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  18. 30854

    30854 Resident of Nat Pres

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    Forget about superelevation, get up a decent rate of knots and it most certainly will ...... or you could go for this:
    Einschienerp.jpg
    [Image credited to en.wikipedia.org for reasons which escape me]
     
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