Sebastopol, an F7, S7 interlude

Discussion in 'Workbenches, including workshop techniques.' started by Dikitriki, 4 October 2019.

  1. Dikitriki

    Dikitriki Flying Squad

    Hi,

    Out of my comfort zone, this one. Great Western, and broad gauge to boot! I've been beetling away on this around other projects, but it's time to bring it into the open.

    The tender chassis is pretty straightforward. Compensated, and with wheels from Slater's to S7 standard.

    P1010002a.jpg

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    The brake gear is a little tricky, getting your head around the various stays and cross beams on the twin pull rods, but it's all in the instructions, which do need to be followed carefully.

    The rodding can be made to be dismountable, and it's worth taking the time and effort to do this. I added some tube on the hangers so the brake unit can be sprung in place onto the main chassis.

    P1010006a.jpg

    P1010007a.jpg

    Richard
     
    Last edited: 4 October 2019
  2. AdeMoore

    AdeMoore Western Thunderer

    Out of your comfort zone! That’s amazing invisible solder you must be using! Never seen joints so clean!
    Great work that.
    Watched thread with interest.
    Cheers
     
  3. Dikitriki

    Dikitriki Flying Squad

    Hi,

    Outer chassis now complete:

    P1010008a.jpg

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    P1010010a.jpg

    The pins on the brake shaft levers engage with the pull rods on the inner chassis. The only amendment I have made is to drill and file a hole in the inner frame for the coupling, so I could spring it as normal.

    Inner and outer chassis united.

    P1010011a.jpg

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    P1010013a.jpg

    The gold-plated axlebox covers are loose and will be glued on after painting. The screws are just dropped in to locate the 2 units. In fact for the final assembly, they pass through both these units and screw into the body from underneath.

    Richard
     
  4. Scale7JB

    Scale7JB Western Thunderer

    Very imposing for a tender chassis !

    JB.
     
  5. Dikitriki

    Dikitriki Flying Squad

    Hi,

    I've now finished the tank. The flare was interesting as it gets higher and wider as it gets towards the rear. In fact, Martin showed the way to form this in the instructions and I followed it to the letter. There was the usual finger forming and fill with solder on the 2 rear corners which I hate - probably why I eschew GWR things - but it was more time-consuming than difficult.

    The rerailing jack frame is on the back of the footplate, and the jack drops on nicely. Perhaps the trickiest bit was forming the 2 davits and adding the section of tube at the top. If those aren't the most vulnerable pieces I've ever seen........

    P1010016a.jpg

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    The springs are attached after painting, butI shall put it all together for a photo when the light is better and the camera battery is recharged!

    Richard
     
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  6. john lewsey

    john lewsey Western Thunderer

    That really is very nice
    John
     
    AdeMoore likes this.
  7. FuntleyWorks

    FuntleyWorks Western Thunderer

    Perhaps the trickiest bit was forming the 2 davits and adding the section of tube at the top. If those aren't the most vulnerable pieces I've ever seen........

    Looking nice Richard, I need to add some photos of mine for comparison!

    Regards those pesky davits, I've drilled two small holes and soldered some micro tube in so when it's painted I can glue them in after Warren has spattered it in his thick paint he uses.......
     
    AdeMoore likes this.
  8. P A D

    P A D Western Thunderer

    Superbly built, as always, but what are the davits for?
     
  9. Dikitriki

    Dikitriki Flying Squad

    Thank you.

    The davits carry the train communication system......whatever that means in practice:)

    Richard
     
  10. mickoo

    mickoo Western Thunderer

    Back in ye olde worlde days, horseless carriages did not have brakes, only the engine.

    So, to alert the driver of an emergency a rope was passed along the carriages and linked to the engine....externally.

    The tender support posts lifted the rope clear of the coal space.

    [​IMG]Communication Cord by Steve, on Flickr
     
  11. P A D

    P A D Western Thunderer

    Thanks Richard and Mick.
     
  12. Dikitriki

    Dikitriki Flying Squad

    That's a huge amount of clearance above any conceivable coal load.
     
  13. P A D

    P A D Western Thunderer

    Not if you put a lifeboat on the davits!
     
    adrian likes this.
  14. mickoo

    mickoo Western Thunderer

    It is, but I suspect the clearance is to load 'under' it from a staging; anyway, that's what I read somewhere, could also be a load of horlicks :D
     
  15. simond

    simond Western Thunderer

    Isn’t it arranged so the wire on the tender stays in line with the chain on the coaches?

    I suppose the logic of that depends on where the bell is mounted?

    Atb
    Simon
     
    LarryG likes this.
  16. JimG

    JimG Western Thunderer

    Actually not too far back into ye olde world. :) The topic of when the "new" system was fitted cropped up in the Caledonian Railway Association forum some years ago. At the time I had just got some drawings of their 48ft coaches from the NRM Microfiche archive and I happened to notice that the old system only was shown on one set of drawings from 1899 and the new system was shown on another set of drawings dated 1900. The Caledonian were quite good at implementing new features so this is probably a good pointer for the changeover to the new coach emergency brake system. The old system might have carried on for a while into the Edwardian period. Here's the pointer into the thread

    Passenger cord communication - Caledonian Railway Association Forum

    Jim.
     
  17. Heather Kay

    Heather Kay Western Thunderer

    The emergency pull rope thing is something I’ve studiously ignored on the BG coaches I’ve built. I cite lack of clear references to understand how it was fitted, and happily the client doesn’t seem too bothered by the lack.

    Following this build fairly closely, as one of these beggars is sitting on the shelf waiting for some love. I’m not sure I really want to tackle it, despite the comprehensive instructions.
     
  18. Dikitriki

    Dikitriki Flying Squad

    Hi,

    I managed to get some photographs before the axleboxes and springs fell off!

    P1010021a.jpg

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    and a little teaser......

    P1010024a.jpg

    Richard
     
  19. Overseer

    Overseer Western Thunderer

    Lovely tender but I am surprised to see the spring hanger stirrup irons cast as solid lumps instead of open below the end of the spring. Looks a bit chunky, unlike the rest of the model.
     
    Dikitriki likes this.
  20. Dikitriki

    Dikitriki Flying Squad

    You're right. It's the one thing that jars. This is a kit built out of the box, and the springs were thus from the outset. We do, however, have a plan......

    Richard
     
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