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70000 Britannia

Discussion in 'Steam Traction' started by pete12000, Jun 1, 2014.

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  1. Martin Perry

    Martin Perry Nat Pres stalwart Staff Member Moderator Friend

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    Why ever not? :)
     
    Martin Perry, Dec 18, 2014
    #121
  2. buseng

    buseng Part of the furniture

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    Some inter-forum rivalry?
    Think there have been some issues in the past.
     
    buseng, Dec 18, 2014
    #122
  3. Martin Perry

    Martin Perry Nat Pres stalwart Staff Member Moderator Friend

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    There are that many people who are members of both forums that there is little point in trying to pretend the other does not exist.
     
    Martin Perry, Dec 18, 2014
    #123
  4. Matt37401

    Matt37401 Nat Pres stalwart

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    Last edited: Dec 18, 2014
    Matt37401, Dec 18, 2014
    #124
  5. siquelme

    siquelme Well-Known Member

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    The missing wheel set has reappeared at Ropley. Wont be long before the BR Atlantic is a Pacific once more
     
    siquelme, Jan 9, 2015
    #125
  6. 46118

    46118 Part of the furniture

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    Info from the works forum( Ian Riley) that the "missing" wheelset was completed on time ( by Christmas) ready for a return to Ropley. As mentioned by an earlier poster, wheelsets pressed onto a new axle. Then new tyres fitted and skimmed down on the wheel lathe to the same diameter as the other four under the loco.
    From the images on Ian Riley's site, looks a good job well done. Thankfully we still have this engineering expertise available in the UK.

    46118
     
    46118, Jan 10, 2015
    #126
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  7. 73129

    73129 Part of the furniture

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    The wheel set also has the axle box's fitted to it and is in Ropley yard on road three.
     
    73129, Jan 10, 2015
    #127
  8. Ian Riley

    Ian Riley Part of the furniture Loco Owner

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    Indeed, the roller bearings and cannon box (axleboxes) were fitted to the new axle before the wheels were pressed to the new axle at the works....
     
    Ian Riley, Jan 10, 2015
    #128
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  9. Steve

    Steve Resident of Nat Pres Friend

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    That would have been a bit of an embarrassing oversight, if they weren't!!
     
    Steve, Jan 10, 2015
    #129
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  10. class8mikado

    class8mikado Part of the furniture

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    has anything over and above the original BR method of wheel pressing been done (other than tlc) to mitigate against the tendency of Brit wheels to shift on the axle ?
     
    class8mikado, Jan 10, 2015
    #130
  11. 26D_M

    26D_M Part of the furniture

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    If techniques have improved it would make absolute sense to adopt a later version of accepted best practice.
    Bearing (no pun!) in mind though the Tangmere RAIB report about modifications, any alternate method would firstly need to be of proven engineering soundness and, secondly, documented for acceptance purposes one would imagine.
     
    26D_M, Jan 11, 2015
    #131
  12. std tank

    std tank Part of the furniture

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    The problem with the Britannias is not about technique, it is about design. The axle to wheel interface diameters are limited by the bearing/axlebox sizes. I would suggest that instead of the relevant axle diameters being 9"/ 10"/ 9" they should have been 10"/11"/10". It was a bad design error by E.S. Cox and Co. It would be interesting to know what the relevant sizes are on Tornado's axles.
     
    std tank, Jan 11, 2015
    #132
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  13. class8mikado

    class8mikado Part of the furniture

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    Amen std tank, but to change this now might be a tad awkward, bigger horn spaces to accommodate ? strengthening and/or even resizing the frames to compensate for that ?...
    Safer to limit the max thrust by lining up the cylinders ? as clans never(?) had this problem ( although a 30,000lb TE/ 250PSI Clan with 9/9/9" axles might !)
     
    class8mikado, Jan 11, 2015
    #133
  14. std tank

    std tank Part of the furniture

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    One of the main Clan jobs in BR days were the Glasgow to Liverpool/ Manchester trains. These were ten bogies, split to five and five at Preston. This was probably the ideal job for them. Ask anything more out of them would probably have led to problems.
     
    std tank, Jan 11, 2015
    #134
  15. Jake MHR

    Jake MHR New Member

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    I saw on Facebook that Britannia is due to go to swanage on the 17th, 18th, 19th of April but the railway touring company is doing a tour to kingswear on the 18th of April which Britannia is due to go on.
     
    Jake MHR, Jan 11, 2015
    #135
  16. Footbridge

    Footbridge Member

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    Footbridge, Jan 15, 2015
    #136
  17. mrKnowwun

    mrKnowwun Part of the furniture

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    and now fitted,

     
    mrKnowwun, Jan 19, 2015
    #137
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  18. NSWGR 3827

    NSWGR 3827 New Member

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    I would be interested in how much interference there is between wheel and Axle, also whether the wheel seat is tapered, were wheels pressed onto their axle with or without tyres fitted?
     
    NSWGR 3827, Jan 20, 2015
    #138
  19. guycarr360

    guycarr360 Part of the furniture

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    Suggest you join intheworks forum, which has a full set of pictures of the process carried out.
     
    guycarr360, Jan 20, 2015
    #139
  20. LMS2968

    LMS2968 Part of the furniture

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    Eric Langridge in Part 2 of 'Under 10 CMEs' goes into this in some details in an appendix covering the movement of wheels on Britannias and Black Fives.

    Generally, tyres were fitted after wheels were pressed on to their axles.
     
    LMS2968, Jan 20, 2015
    #140
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