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6023

Discussion in 'Steam Traction' started by Eightpot, Oct 4, 2011.

  1. Penricecastle

    Penricecastle Member

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    That's fair enough. I may be wrong here, but did you see and hear 6023 on any of its SVR test runs? I saw three of the runs up Eardington bank and the loco sounded quite loud to me. Surely if it was really opened out it would have a very loud bark? I guess these are early days and more will be revealed regarding 6023's audio levels with time. Cheers.
     
  2. Scrat

    Scrat New Member

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    Agree with this, except to point out that the train heating and a leaking whistle valve will have no effect upon the mass flow through the blastpipe what so ever....
     
  3. MellishR

    MellishR Part of the furniture Friend

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    Surely Jos's point was that there was plenty of draft to burn the coal to make the steam even though not all that steam was contributing to the blast.
     
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  4. Sir Nigel Gresley

    Sir Nigel Gresley Active Member

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    If you want a loud bark, you'd better go to Germany and witness an ex-DR 50.35 on a Sonderfahrt! And if you travel, you can drop the windows, and lean out to your heart's desire. (And the prices are very reasonable.)
     
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  5. Courier

    Courier New Member

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    On a 4 cyl loco a bark may be a sign that both the exh ports are opening at the same time.

    On any loco it may be a sign that the piston valves are designed to give a rapid opening in area (with valves sealed with rings the valve starts to open when the ring passes the port, but the valve is not fully open until the valve head has passed the port - so there is a limited area and no bark - whereas on a GW semi-plug the valve head controls the valve events)

    Neither is a sign of excess backpressure.
     
  6. Lplus

    Lplus Well-Known Member

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    Interesting, and yet the multi-ring valve heads I've worked on have had the head diameter reduced and shaped outside of the outer rings to ensure a clear passage for the steam as soon as the ring opened the port, and the locos still haven't been particularly loud; which rather trips up your explanation.
    Still, if you really believe an earth shattering roar is a sign of efficiency, then I'm not going to bother arguing with you.
     
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  7. Jimc

    Jimc Part of the furniture

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    Its been often observed that the "bark" of GWR locomotives has a distinctive quality. It does seem probably this is down to detailed design. I strongly suspect that the causes and characteristics of the sound is a complex subject, little studied (since silencing has never been a requirement). One would expect that the detail design of ports, valves and all the rest had a significant effect on the quality of the sound.
     
  8. JJG Koopmans

    JJG Koopmans Member

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    All details apart, the most important question for me is whether the majority of you have understood how this works.
    Basically double chimneys doubled again, however within a single envelope!
    Kind regards
    Jos
     
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  9. Tim Light

    Tim Light Active Member

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    Maybe it's just me, but I think the Kings look wrong with reduced height fittings. I know it's only a couple of inches, but the squat chimney and safety valve bonnet look quite out of proportion on such a large boiler.

    I'm disappointed that 6023 will not be operating on the main line, but I hope we'll be able to see her operating with full height and fittings on preserved lines.
     
  10. Allegheny

    Allegheny Member

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    Would you keep the four orifice blastpipe if a full height chimney is refitted?
     
  11. Kje7812

    Kje7812 Well-Known Member

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    Surely this would then change the draughting again?
     
  12. JJG Koopmans

    JJG Koopmans Member

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    The restauration crew have already said they can miss the work like a sore thumb! Moreover, the full height bonnet is lost.
     
  13. GWR4707

    GWR4707 Resident of Nat Pres

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    I don't think it looks so bad on 6023, however 6024 always looks like someone has sat on it?

    If its working leave it as it is, does anyone have any idea of the plans post SVR is she off back to Didcot or elsewhere on her travels, with the ball ache of getting her in and out of Didcot (especially as the DBC trip moving option seems to have ceased) it would make more sense if they are trying to make a few quid back to have the next hire lined up and move her direct from the SCVR to wherever?
     
  14. pwsw5054

    pwsw5054 Member

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    Gloucestershire warwickshire after that. Then nothing announced I believe.

    Sent from my SM-A310F using Tapatalk
     
  15. Sidmouth

    Sidmouth Resident of Nat Pres Staff Member Moderator

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    off to the GWSR after SVR date TBC, then i'm hearing rumours of further preserved line visits
    with the certificate ticking I suspect it is earn as many ££ as possible .

    if the boiler is in good order hopefully a new ten year should be fairly quick and the main line landscape a little better . With the move to WC/IoS/VT and more inhouse/ self contained operation where will both 6023 and 4079 in theory run and who with
     
  16. GWR4707

    GWR4707 Resident of Nat Pres

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    This is all hypothetical, however I suspect that the GWS will start working closely with VT as an operator, as WC won't really be viable geographically and I am not sure if IoS are going to operate Vac, as I cannot see the GWS going to air unless they really have to? Plus there is some symmetry in USP between VT and GWS? There is still the issue of getting stuff in and out of Didcot, and it did suggest in the last Echo that in order to address this they were considering setting up as their own TOC just for the short trips to West Yard?
     
  17. Tim Light

    Tim Light Active Member

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    No idea. I just want it to look nice!
     
  18. Penricecastle

    Penricecastle Member

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    I think the eye becomes accustomed to changes in the locomotive's appearance. 6023 looks just fine to me with the lower profile. The chimney shape is quite elegant. In fact, 6023 looks more powerful and bigger, more like a "super King". I've always felt that the copper cap on 6024's lower double chimney looks a little too "flared out" which doesn't help it's appearance from certain angles, although I guess that couldn't be avoided.
     
  19. GWR4707

    GWR4707 Resident of Nat Pres

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    I wonder whether @JJG Koopmans will be invited to look at the draughting of 6024 after the 6023 success?
     
  20. Matt37401

    Matt37401 Part of the furniture

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    Does 6024 need anything doing to it though?
     

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