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73096

Discussion in 'Steam Traction' started by domeyhead, Mar 16, 2009.

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  1. boldford

    boldford Member

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    The SVR rely on the peening over a threaded plug technique which if done well is pretty reliable (but not infallible). The descriptions above of hollow pistons is correct however they omit to mention the internal radial webs located between the coreplugs. There may have been exceptions but, having made and repaired pattern sets for them I can confirm, generally LMS & BR practice was to have 6 webs and 6 plugs and western was 4.

    This thread seems to be turning into a bit of an MIC.
     
    boldford, Mar 21, 2009
    #101
  2. Columbine

    Columbine Member

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    Sorry to continue this thread for those who are bored with it ... but ... is the piston head heat treated after the casting process? It struck me that a cast iron piston head might be pretty fragile and as the process of fitting the core plug seems to include some hammering ... also a screw thread in cast iron is a little suspect for the force that will be applied to it as described in earlier posts.

    So, is the cast iron piston head subjected to the process that will turn it into 'malleable iron'?

    Regards
     
    Columbine, Mar 21, 2009
    #102
  3. LMS2968

    LMS2968 Part of the furniture

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    Not that I'm aware of, nor is there any need.

    Cast iron is used in many applications and is a perfectly sound material, being very good in compression, less so in tension. There are different grades of iron which can be used, and it needs to be suitable for the job, but cast iron can certainly take a screw thread: that's what holds on the cylinder head on your car's engine!
     
    LMS2968, Mar 21, 2009
    #103
  4. michaelh

    michaelh Part of the furniture

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    malleable iron was marketed on the claim that it had the strength of steel with the machineability of cast iron. My experience of purchasing malleable or SG iron castings in the 1980's was that it was a very imprecise process and quality was very variable.
     
    michaelh, Mar 21, 2009
    #104
  5. KHARDS

    KHARDS Well-Known Member

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    Looking on the website, the pictures are shocking. Very sad. One question, (admittedly totally unrelated) looking at the pictures there was one with an non-operational unrebuilt Bulleid in the yard. Am I right in thinking this is 34105 Swanage?
     
    KHARDS, Mar 22, 2009
    #105
  6. twr12

    twr12 Well-Known Member

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    How about 73096?

    Apparently, MHR have been discussing a new cylinder block casting with the Foundry that did the new one for 34027.
     
    twr12, Mar 22, 2009
    #106
  7. 34007

    34007 Part of the furniture

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    That will be good news - especially if they can get the pattern for a new cylinder block for 73096?

    But even more good news goes about the possible overhaul of Swanage.... I can't see this being within the next few years though for even the start of overhaul?? Sounds like Bodmin could be done in latter years as well??
     
    34007, Mar 22, 2009
    #107
  8. 34007

    34007 Part of the furniture

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    I agree - So lets leave this thread on any new posts regarding the new Cylinder and the progress....

    I agree that a thread should be made regarding 34105 & 76017 and any progress.. So can these be moved and a new thread be made please Mods??
     
    34007, Mar 23, 2009
    #108
  9. Diamond Gaz

    Diamond Gaz Well-Known Member

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    Done!

    Thread on 76017 and 34105 is here:
    viewtopic.php?f=28&t=18745
     
    Diamond Gaz, Mar 23, 2009
    #109
  10. 30850

    30850 New Member

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    when it went kablooey apparently the shock went through the train so it must have kicked back quite a bit, i wonder what state the motion is in.
     
    30850, Mar 24, 2009
    #110
  11. ralphchadkirk

    ralphchadkirk New Member Account Suspended

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    Broken. bent
     
    ralphchadkirk, Mar 25, 2009
    #111
  12. 1472

    1472 Well-Known Member

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    Not to mention crankpins, wheel axle seating etc
     
    1472, Mar 25, 2009
    #112
  13. boldford

    boldford Member

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    It probably didn't do a great deal of good to the nervous state of the loco crew either.
     
    boldford, Mar 25, 2009
    #113
  14. Diamond Gaz

    Diamond Gaz Well-Known Member

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    I'm presuming that the loco is insured, so is it likely that the insurance will end up paying for the repairs?
     
    Diamond Gaz, Mar 25, 2009
    #114
  15. ruddermode

    ruddermode New Member

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    Is the motion going to be scrapped?

    Sounds like an opportunity to sell/auction bits of it. I drove 73096 last year and I know that I'd like to own a bit of it, even if it is a bit worse for wear...
     
    ruddermode, Mar 25, 2009
    #115
  16. porous pot

    porous pot New Member

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    Don't shoot me down in flames, but one question has been hinted at but not asked.

    Who does own 73096?
     
    porous pot, Mar 25, 2009
    #116
  17. Sidmouth

    Sidmouth Resident of Nat Pres Staff Member Moderator

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    in theory , the piston rod and cylinder head have taken all the force and hopefully saving wheels boxes and motion

    others can correct me but there was no reported significant damage to 7325,75014,45231 when they suffered a similar fate
     
    Sidmouth, Mar 25, 2009
    #117
  18. kieranhardy

    kieranhardy Well-Known Member

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    John Bunch.

    He also owns MHR based locos 34016, 31806, 31874 & 31625. I also remember seeing on an old page (now deleted) on the MHR site, that he part owned or was at least something to do with 76017 or 34105? But as it's gone i have no idea now.
     
    kieranhardy, Mar 25, 2009
    #118
  19. porous pot

    porous pot New Member

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    Thanks. I thought it might be, and that explains the thinly veiled references to someone at odds with the Mid Hants. Or is it the Mid Hants at odds with John Bunch? Either way this terrible accident will not help relationships between the 2 parties. I think that the Preservation Movement as a whole will suffer and the Legal Profession gain.
     
    porous pot, Mar 25, 2009
    #119
  20. cct man

    cct man Part of the furniture

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    If you think about it , JB is quids in here. He gets a new cylinder whether the insurance pays out of not, AND he gets paid whether the Loco runs or not.

    Who is at odds now? :-k

    Regards
    Chris
     
    cct man, Mar 25, 2009
    #120
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