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 of Jubilees

Discussion in 'Steam Traction' started by Big Dave, Apr 21, 2017.

  1. Big Dave

    Big Dave Member

    Joined:
    Dec 17, 2006
    Messages:
    467
    Likes Received:
    25
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Bewdley
    Can't help but thinking this class could have been so much more useful if the front end had been properly sorted it seems that they only fiddled with the draughting throughout the lives of these loco's. It would seem that they were on the way to sorting it with the Kylchap fitted to 5684 in 1937.
     
  2. JJG Koopmans

    JJG Koopmans Member

    Joined:
    Nov 12, 2014
    Messages:
    234
    Likes Received:
    173
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    My idea! Probably after the tests with GWR 6023 a discussion about the Jubilees makes sense.
    Their 1:7 tapered chimneys would be ideal for a cheap adaptation.
    Kind regards
    Jos Koopmans
     
    ragl likes this.
  3. class8mikado

    class8mikado Well-Known Member

    Joined:
    Jun 1, 2009
    Messages:
    1,975
    Likes Received:
    324
    Occupation:
    Print Estimator/ Font of all knowledge (useful, or
    Location:
    Bingley W.Yorks.
    Presumably it needs to be more like 1:12 with no lessening perhaps increasing of the choke ? so that would need a new pot ? - Think we will have to wait till a new one is actually needed before anyone will spend the extra to change this.
    Also the chance that the characteristic (of throttled exhaust) roar so typical of this type would be lost. :Bawling:
    Still Bahamas with its 'last blast' configured double blast pipe is supposedly 'good for an extra coach' so if it can be 'got right' there's some incentive there.... Is the copy of the 1961 Rugby tests on this class available to shed some light as several other chimneys had been tried on Jubes before hand without much joy...
     
    Last edited: Apr 21, 2017
  4. DisusedBranch

    DisusedBranch Active Member

    Joined:
    Jun 17, 2009
    Messages:
    784
    Likes Received:
    507
    Location:
    Here be haggis
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Draughting of Jubilee's what?
     
    LMS2968 likes this.
  5. class8mikado

    class8mikado Well-Known Member

    Joined:
    Jun 1, 2009
    Messages:
    1,975
    Likes Received:
    324
    Occupation:
    Print Estimator/ Font of all knowledge (useful, or
    Location:
    Bingley W.Yorks.
    :Stop:Aaargh the apostrophe police...
     
  6. Big Dave

    Big Dave Member

    Joined:
    Dec 17, 2006
    Messages:
    467
    Likes Received:
    25
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Bewdley
    Apparently the jubes were front end limited by back pressure during some last gasp speeding up of services it was found that they would not go past 97 mph.
    As to the kylchap apparently it was very free running but threw fire when pushed something about the kychap being too big?
     
  7. class8mikado

    class8mikado Well-Known Member

    Joined:
    Jun 1, 2009
    Messages:
    1,975
    Likes Received:
    324
    Occupation:
    Print Estimator/ Font of all knowledge (useful, or
    Location:
    Bingley W.Yorks.
    WelL if they took it off a NE region Pacific it would be.
     
  8. JJG Koopmans

    JJG Koopmans Member

    Joined:
    Nov 12, 2014
    Messages:
    234
    Likes Received:
    173
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    If the chimneys are of original dimensions, they do not need any change, just the blastcap.
    I have been given 67 Rugby test results, I think I know what could be done.
    Kind regards
    Jos Koopmans
     
  9. class8mikado

    class8mikado Well-Known Member

    Joined:
    Jun 1, 2009
    Messages:
    1,975
    Likes Received:
    324
    Occupation:
    Print Estimator/ Font of all knowledge (useful, or
    Location:
    Bingley W.Yorks.
    You're the man...
    Whats the Latest on Kohlapur. Potential Guinea Pig ?
     
    Last edited: Apr 21, 2017
  10. andalfi1

    andalfi1 Active Member

    Joined:
    Nov 5, 2008
    Messages:
    749
    Likes Received:
    306
    Gender:
    Male
    Location:
    Haworth
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Are we to assume from the above, that you would recommend a fabricated, steel blastcap to your dimensions ? in which case the savings made would soon repay the cost and, may be of interest to a certain TOC on the West Coast, it would be nice if Mr. Shutleworth could have a word with the owner once the cost/benefit becomes known.
    I really like the idea of a 'Super Jube' especially if we can improve on the 97 mph. limit... ;)
     
    Gav106 likes this.
  11. JJG Koopmans

    JJG Koopmans Member

    Joined:
    Nov 12, 2014
    Messages:
    234
    Likes Received:
    173
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Yes, assuming that my information is correct (Rowledge/Reed, the Stanier 4-6-0's of the LMS). The Rugby data are ok anyway.
    The 6023 blastcap was contracted outside and cost around 350GBP. Looks like fair game isn't it? A few tons of coal.
    Kind regards
    Jos Koopmans
     
    andalfi1 and Sheff like this.
  12. Sheff

    Sheff Part of the furniture

    Joined:
    Apr 21, 2006
    Messages:
    6,431
    Likes Received:
    925
    Gender:
    Male
    Occupation:
    Retired Engineer & Heritage Volunteer
    Location:
    N Warks
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Perhaps hang fire until 6023's got some mainline mileage under her belt?
     
  13. JJG Koopmans

    JJG Koopmans Member

    Joined:
    Nov 12, 2014
    Messages:
    234
    Likes Received:
    173
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Certainly, see my earlier post#2
    Kind regards
    Jos Koopmans
     
  14. Allegheny

    Allegheny New Member

    Joined:
    May 8, 2015
    Messages:
    134
    Likes Received:
    46
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Is anyone proposing to redraught a Jubilee, or is this just hypothetical. Did Chapelon patent the Kylchap, so they would have had to pay royalties to use it.
     
  15. JJG Koopmans

    JJG Koopmans Member

    Joined:
    Nov 12, 2014
    Messages:
    234
    Likes Received:
    173
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    No, it is just a good idea! At the time the Kylchap was patented, that should now be expired.
    However, nowadays a Kylchap is just a completely unnecessary complication.
    Kind regards
    Jos Koopmans
     
  16. 2392

    2392 Member

    Joined:
    Jun 7, 2010
    Messages:
    411
    Likes Received:
    97
    Gender:
    Male
    Location:
    Felling on Tyne
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    The patent for the double chimney/Kylchap at least expired not long after the much lamented Sir Nigel Gresley who died in April 1941. The patent expiring in September or so '41.
     
  17. Allegheny

    Allegheny New Member

    Joined:
    May 8, 2015
    Messages:
    134
    Likes Received:
    46
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    I was thinking the patent may have put the LMS off using it in 1937; obviously not a problem now.
     
  18. Fred Kerr

    Fred Kerr Part of the furniture

    Joined:
    Mar 24, 2006
    Messages:
    5,026
    Likes Received:
    1,725
    Gender:
    Male
    Occupation:
    Freelance photo - journalist
    Location:
    Southport
    Given his contribution to the overhaul of 6023 is there any value of Jos Koopmans contributing to the overhaul of 45596 or has the Bahamas Society not reached that stage of restoration ?
     
  19. JJG Koopmans

    JJG Koopmans Member

    Joined:
    Nov 12, 2014
    Messages:
    234
    Likes Received:
    173
    Gender:
    Male
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Those interested are patiently waiting on the further tests with 6023, as far as I am concerned they rightfully do so!
    Since this is a blastpipe change only the working Jubilees would be preferable imho.
    Kind regards
    Jos
     
  20. MG 7305

    MG 7305 New Member

    Joined:
    Mar 30, 2009
    Messages:
    21
    Likes Received:
    25
    Please can we lose the grocer's apostrophe in the thread title?
     
    MellishR likes this.

Share This Page