If you register, you can do a lot more. And become an active part of our growing community. You'll have access to hidden forums, and enjoy the ability of replying and starting conversations.

Draughting arrangements for Bulleid Pacifics including the Giesl ejector

Discussion in 'Steam Traction' started by jamesd, Oct 14, 2014.

  1. Jamessquared

    Jamessquared Nat Pres stalwart

    Joined:
    Mar 8, 2008
    Messages:
    23,012
    Likes Received:
    45,107
    Location:
    LBSC 215
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    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
     
  2. Big Al

    Big Al Nat Pres stalwart Staff Member Moderator

    Joined:
    May 30, 2009
    Messages:
    18,735
    Likes Received:
    17,809
    Location:
    1016
    Heritage Railway Volunteer:
    No I do not currently volunteer
    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. :)
     
  3. fergusmacg

    fergusmacg Part of the furniture

    Joined:
    Aug 17, 2008
    Messages:
    6,097
    Likes Received:
    3,449
    Occupation:
    Design Engineer
    Location:
    Cumbria
    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!
     
  4. Allegheny

    Allegheny Member

    Joined:
    May 8, 2015
    Messages:
    579
    Likes Received:
    283
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Sounds like the rebuilts were overdraughted. Good luck to Steve Rapley in sorting this out.:)
     
  5. Allegheny

    Allegheny Member

    Joined:
    May 8, 2015
    Messages:
    579
    Likes Received:
    283
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Ribblehead viaduct might be interesting at times.:)
     
  6. JJG Koopmans

    JJG Koopmans Member

    Joined:
    Nov 12, 2014
    Messages:
    370
    Likes Received:
    450
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Please, don't! Draughting and vision impairment are interconnected this time!
    Kind regards
    Jos
     
    Allegheny likes this.
  7. srapley

    srapley New Member

    Joined:
    Jul 27, 2008
    Messages:
    73
    Likes Received:
    99
    Occupation:
    Aerodynamicist (by day)/CME 35011 (spare time)
    Location:
    Burton-on-Trent
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    They're necessary for an air-smoothed MN...
     
    MellishR likes this.
  8. srapley

    srapley New Member

    Joined:
    Jul 27, 2008
    Messages:
    73
    Likes Received:
    99
    Occupation:
    Aerodynamicist (by day)/CME 35011 (spare time)
    Location:
    Burton-on-Trent
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    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.
     
  9. class8mikado

    class8mikado Part of the furniture

    Joined:
    Jun 1, 2009
    Messages:
    3,289
    Likes Received:
    1,242
    Occupation:
    Print Estimator/ Repository of Useless Informatio.
    Location:
    Bingley W.Yorks.
    Heritage Railway Volunteer:
    No I do not currently volunteer
    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...
     
    paullad1984 likes this.
  10. Big Al

    Big Al Nat Pres stalwart Staff Member Moderator

    Joined:
    May 30, 2009
    Messages:
    18,735
    Likes Received:
    17,809
    Location:
    1016
    Heritage Railway Volunteer:
    No I do not currently volunteer
    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.
     
  11. 30854

    30854 Resident of Nat Pres

    Joined:
    Mar 8, 2017
    Messages:
    10,035
    Likes Received:
    9,685
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Brighton&Hove
    Heritage Railway Volunteer:
    No I do not currently volunteer
    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
     
    MellishR, jnc and Jamessquared like this.
  12. class8mikado

    class8mikado Part of the furniture

    Joined:
    Jun 1, 2009
    Messages:
    3,289
    Likes Received:
    1,242
    Occupation:
    Print Estimator/ Repository of Useless Informatio.
    Location:
    Bingley W.Yorks.
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Everyone knows that putting stripes on makes things go faster as well...
     
    MellishR, 30854, jnc and 1 other person like this.
  13. martin1656

    martin1656 Nat Pres stalwart Friend

    Joined:
    Dec 8, 2014
    Messages:
    15,503
    Likes Received:
    9,563
    Gender:
    Male
    Location:
    St Leonards
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Got to be Post war Malachite green with yellow lines and sunshine lettering
     
    srapley likes this.
  14. 30854

    30854 Resident of Nat Pres

    Joined:
    Mar 8, 2017
    Messages:
    10,035
    Likes Received:
    9,685
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Brighton&Hove
    Heritage Railway Volunteer:
    No I do not currently volunteer
    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'
     
  15. srapley

    srapley New Member

    Joined:
    Jul 27, 2008
    Messages:
    73
    Likes Received:
    99
    Occupation:
    Aerodynamicist (by day)/CME 35011 (spare time)
    Location:
    Burton-on-Trent
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Correct, it was one of three MNs to not be painted blue
     
  16. Allegheny

    Allegheny Member

    Joined:
    May 8, 2015
    Messages:
    579
    Likes Received:
    283
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    If you were really keen, you would make it tilt when it goes round curves.
     
  17. MellishR

    MellishR Resident of Nat Pres Friend

    Joined:
    Apr 16, 2009
    Messages:
    6,544
    Likes Received:
    4,004
    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.
     
  18. 30854

    30854 Resident of Nat Pres

    Joined:
    Mar 8, 2017
    Messages:
    10,035
    Likes Received:
    9,685
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Brighton&Hove
    Heritage Railway Volunteer:
    No I do not currently volunteer
    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]
     
    andrewshimmin likes this.

Share This Page