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.

P2 Locomotive Company and related matters

Discussion in 'Steam Traction' started by class8mikado, Sep 13, 2013.

  1. Richard Roper

    Richard Roper Member

    Joined:
    May 22, 2006
    Messages:
    414
    Likes Received:
    156
    Gender:
    Male
    Occupation:
    Librarian
    Location:
    Halifax, but almost in Sowerby Bridge
    Heritage Railway Volunteer:
    No I do not currently volunteer
    I seem to remember that the last thing Anthony Coulls said about Green Arrow's monobloc, was that it had not been categorically stated that it was irrepairable. Only a complete strip-down would be able to ascertain this though, and that will in itself cost money.

    Richard.
     
  2. class8mikado

    class8mikado Well-Known Member

    Joined:
    Jun 1, 2009
    Messages:
    2,384
    Likes Received:
    584
    Occupation:
    Print Estimator/ Font of all knowledge (useful, or
    Location:
    Bingley W.Yorks.
    As Kylchap has said, if a group was prepared to fund a ' Worse Case scenario' return to steam
    ie strip down, potentially new cylinders/ unforeseen boiler work / frames repairs/ contingency then I think that the NRM would allow this, I think they would with any of their locos as long as certain conditions we're met.
    Potentially a 7 figure sum it would take a lot of desire on somebodies / lots of peoples parts but possibly still cheaper than a newbuild.
    Cant see the NRM funding anything apart from FS for the next 15 years, then maybe they will think about dusting off Mallard for her 100'th ?
     
  3. 242A1

    242A1 Active Member

    Joined:
    Dec 3, 2006
    Messages:
    1,033
    Likes Received:
    437
    There is little doubt that the procedure will be successful. Fabricated cylinders rather than castings are not unusual.
    As for Green Arrow there is little chance, some would say no chance, of anything being done. The days of the NRM having staff capable of assessing and subsequently carrying out work on machinery/exhibits to be in running order are long since gone. The same could be said of the desire to have exhibits working.
    If you want a V2 to run get the A1/P2 people to build one. It will probably be cheaper too.
     
    2392, Rosedale and Sawdust like this.
  4. 2392

    2392 Active Member

    Joined:
    Jun 7, 2010
    Messages:
    651
    Likes Received:
    234
    Gender:
    Male
    Location:
    Felling on Tyne
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Must admit I wasn't really putting forward the idea of restoring Green Arrow to running order per sa. Rather suggesting that the P2 boys plans appear to be opening up another option to casting a new mono-bloc should the N.R.M. wish to restore the engine.
     
    andalfi1 likes this.
  5. Muzza

    Muzza New Member

    Joined:
    Feb 16, 2006
    Messages:
    133
    Likes Received:
    50
    Gender:
    Male
    Location:
    Mareeba, Qld, Australia
    Heritage Railway Volunteer:
    No I do not currently volunteer
    ......and Girls!
     
  6. class8mikado

    class8mikado Well-Known Member

    Joined:
    Jun 1, 2009
    Messages:
    2,384
    Likes Received:
    584
    Occupation:
    Print Estimator/ Font of all knowledge (useful, or
    Location:
    Bingley W.Yorks.
    Hoping to get to the Roadshow in York tomorrow but a combination of snow, strikes and a bad back are putting me of a little...
     
  7. Foxhunter

    Foxhunter Member

    Joined:
    Jun 9, 2011
    Messages:
    557
    Likes Received:
    535
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    It is definitely going ahead, the Trust has posted as much on social media.

    Foxy
     
  8. Richard Roper

    Richard Roper Member

    Joined:
    May 22, 2006
    Messages:
    414
    Likes Received:
    156
    Gender:
    Male
    Occupation:
    Librarian
    Location:
    Halifax, but almost in Sowerby Bridge
    Heritage Railway Volunteer:
    No I do not currently volunteer
  9. 240P15

    240P15 Member

    Joined:
    Dec 1, 2017
    Messages:
    430
    Likes Received:
    410
    Gender:
    Male
    Location:
    Norway
    Heritage Railway Volunteer:
    No I do not currently volunteer
    S.A.C. Martin likes this.
  10. Kylchap

    Kylchap New Member

    Joined:
    Dec 15, 2015
    Messages:
    133
    Likes Received:
    178
    Gender:
    Male
    Location:
    East Anglia
    Heritage Railway Volunteer:
    No I do not currently volunteer
    I think that crank axle assembly is a work of art as well as superb engineering. They have put huge effort into designing and manufacturing a component that should eliminate the main design flaw of the original engines.

    I eagerly anticipate following the development of the redesigned cylinder block and valve gear as this progresses.
     
  11. W.Williams

    W.Williams Active Member

    Joined:
    Dec 20, 2015
    Messages:
    694
    Likes Received:
    517
    Occupation:
    Mechanical Engineer
    Location:
    Aberdeen
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    [​IMG]

    [​IMG]

    This really does look like superb engineering to me. Those bearings don't looks split, guessing they aren't coming off any time soon!
     
  12. 240P15

    240P15 Member

    Joined:
    Dec 1, 2017
    Messages:
    430
    Likes Received:
    410
    Gender:
    Male
    Location:
    Norway
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Richard Roper and 30854 like this.
  13. Richard Roper

    Richard Roper Member

    Joined:
    May 22, 2006
    Messages:
    414
    Likes Received:
    156
    Gender:
    Male
    Occupation:
    Librarian
    Location:
    Halifax, but almost in Sowerby Bridge
    Heritage Railway Volunteer:
    No I do not currently volunteer

    Surely there has to be a joint somewhere on the axlebox casting? The inner races were interference-fitted to the axle a few weeks back, and looking at the axlebox casing, it fully encloses the bearing inner races... But I'm damned if I can see the joint!

    Richard.
     
  14. W.Williams

    W.Williams Active Member

    Joined:
    Dec 20, 2015
    Messages:
    694
    Likes Received:
    517
    Occupation:
    Mechanical Engineer
    Location:
    Aberdeen
    Heritage Railway Volunteer:
    Yes I am an active volunteer

    Same, if there is a joint there, the machining work something else.

    Maybe the boxes go on axially???
     
  15. 8126

    8126 Member

    Joined:
    Mar 17, 2014
    Messages:
    535
    Likes Received:
    372
    Gender:
    Male
    I doubt it, split cannon boxes on axles without a crank axle were well known. Looking at those boxes, I'd say they're split on the horizontal centre line, with vertical bolts at the four corners. If you asked me to do it (which, being sensible, you will not), I'd take the castings for the two halves, rough them out, then finish machine the mating surfaces (grinding maybe) and the bolt holes, before bolting the two halves together for the rest of the finishing operations. Done right, you won't easily see the joint.
     
  16. 242A1

    242A1 Active Member

    Joined:
    Dec 3, 2006
    Messages:
    1,033
    Likes Received:
    437
    Have another look. Four bolts running down from the top, nuts visible at the bottom. And you scarcely see the joint.
     
  17. Foxhunter

    Foxhunter Member

    Joined:
    Jun 9, 2011
    Messages:
    557
    Likes Received:
    535
    Heritage Railway Volunteer:
    Yes I am an active volunteer
  18. BrightonBaltic

    BrightonBaltic Member

    Joined:
    May 26, 2011
    Messages:
    598
    Likes Received:
    177
    That bearing is just pure engineering porn!

    With yesterday's news about Tonka, will this mean the P2 having to take a back-seat for a while, perhaps even be moved out of the works so the damage can be repaired? I also wonder, if the repairs prove costly, how they might be funded? I'd presume that the P2's bank account is legally ringfenced and cannot be raided or borrowed from.
     
  19. W.Williams

    W.Williams Active Member

    Joined:
    Dec 20, 2015
    Messages:
    694
    Likes Received:
    517
    Occupation:
    Mechanical Engineer
    Location:
    Aberdeen
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    What is this referring to? Please enlighten one...
     
  20. NeilL

    NeilL Active Member Friend

    Joined:
    Mar 30, 2012
    Messages:
    942
    Likes Received:
    481
    Occupation:
    Retired & PWay tree feller
    Location:
    Staffordshire
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    News obviously takes a while to percolate to Aberdeen
     
    BrightonBaltic likes this.

Share This Page