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BR Standard class 6 No. 72010 'Hengist' and Clan Discussion Thread

Discussion in 'Steam Traction' started by Bulleid Pacific, Nov 23, 2009.

Page 139 of 139
  1. northernsteam

    northernsteam Member

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    I must hasten to mention that, to my knowledge, I had no part in this at all!
    But it must be great news, congratulations to those who gave the invitation.
    You must have really made his visit a very good experience for all his party.
     
    northernsteam, Aug 8, 2025
    #2761
    bristolian likes this.
  2. northernsteam

    northernsteam Member

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    Latest News shows the modified rear cylinder covers all machined up. I hope they don't find any mistakes on them, it looks a lot of work and effort, not to mention the cost!
     
    northernsteam, Sep 17, 2025
    #2762
  3. ianh1

    ianh1 Member

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    We are reasonably confident as Pattinsons took quite a bit of care on them. Next week we will get them onto the surface table to check key dimensions
     
    ianh1, Sep 17, 2025
    #2763
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  4. osprey

    osprey Resident of Nat Pres

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    Surface table... don't you mean surface plate (calibrated) ? ...not being critical btw.
     
    osprey, Sep 17, 2025
    #2764
  5. northernsteam

    northernsteam Member

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    It perhaps rather depends on the size of it? In my day a surface plate was portable, a surface table needed a 25ton o/h crane to shift it!
     
    Last edited: Sep 18, 2025
    northernsteam, Sep 17, 2025
    #2765
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  6. ianh1

    ianh1 Member

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    This one was moved with the overhead crane. It was far too heavy for 2 of us to lift
     
    ianh1, Sep 30, 2025 at 8:06 PM
    #2766
  7. 60044

    60044 Well-Known Member

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    Have I~ missed something here, and the cylinders have already been cast and machined? If they haven't, making the covers first seems (to, admittedly, a non-engineer) and back to front way of doing things!
     
    60044, Oct 1, 2025 at 10:03 AM
    #2767
  8. ianh1

    ianh1 Member

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    No you haven't missed anything and yes the covers have been made before the cylinders.

    Front covers

    A long, long time ago (before my time) the project obtained a couple of front cylinder cover castings with no paperwork. Recently we tested these and found a crack in one of the castings. This has had to be scrapped. The other cover is OK and can be machined. We have borrowed the pattern for the cylinder cover and are currently seeking quotations for casting a cover to replace the scrapped cover.

    Hind Covers

    At last years Open Day, we had a couple of visitors from the Ironmongers' Company who were very interested in our project. They offered to provide a grant for us to manufacture a cast iron component. We decided to use that grant to manufacture the hind covers. It would be an interesting project as we modified the design to provide the support to the front of the slidebars. The grant covered the casting of the covers and part of the cost of machining.

    The project aims to collect parts so that when the cylinders have been cast and machined, we can start assembly without waiting for parts.

    Hope that helps!

    Ian
     
    ianh1, Oct 1, 2025 at 10:26 AM
    #2768
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  9. gz3xzf

    gz3xzf Member

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    Ian
    I assume from this that on the Clans originally (like the Brits) the slide bars were solely supported with the bracket on the frames?
    Is is a known issue that you're trying to eliminate or was it considered a better way to do it?
     
    gz3xzf, Oct 3, 2025 at 11:33 AM
    #2769
  10. ianh1

    ianh1 Member

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    ianh1, Oct 3, 2025 at 11:56 AM
    #2770
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