Class 27 From kit to completion.

Discussion in 'Workshop Benches' started by York Paul, Jan 8, 2019.

  1. paul_l

    paul_l Staff Member Administrator

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    Blimey - have I got some catching up to do, I go to work, come home to a pile of boxes (the bits for my new PC), and when I start up my old PC I have a full inbox, and new long todo list - as they say there's no rest for the wicked, I just can't remember having done this much wrong :avatar:

    Will catch up with the in box, and be back

    Paul - the other one with the over filled inbox :avatar:
     
  2. Toto

    Toto Staff Member Founder Administrator

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    I wouldn't worry Yorkie. It will make no difference to the finished article. It's just a nice to know for the future. :thumbs:
     
  3. paul_l

    paul_l Staff Member Administrator

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    Boy has Steve been busy

    The 26 Cab roof

    upload_2019-2-6_21-41-50.png

    And revised Windows to accommodate the new roofs for both the 26 & 27

    upload_2019-2-6_21-45-49.png

    For those more observant, the Current Pic of the week on this very thread, shows Leaf springs on the bogie and not a pair of coil springs, Steve to the rescue (as normal) and has produced a 3D file for me to print.

    upload_2019-2-6_21-51-10.png

    Total height of the spring approx 7mm, with a replacement support bracket

    upload_2019-2-6_21-54-23.png

    Looks like I have some prep work to do.

    Paul
     
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  4. Toto

    Toto Staff Member Founder Administrator

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    So ..... why are you hanging around :avatar:
     
  5. SBt

    SBt Full Member

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    No don't laminate them, I don't know what I've written there - proceed as drawn. I think what I'm trying to say is: 'the 1/2 etch detail faces outwards giving the impression they are handed...'
     
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  6. York Paul

    York Paul Staff Member Moderator

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    Thanks Steve that is what I thought that each faced outwards with a slight gap between the both, I haven't laminated them because study of pictures suggest these are thin thicknesses. I would appear then this fret is duplicated in the kit, one being attached to the brake pull rod fret and the other is on the primary spring carrier iron fret. Anyway thanks again for the directive. :thumbs:

    Yorkie
     
  7. York Paul

    York Paul Staff Member Moderator

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    I struggled a bit this evening attempting to put the coil spring carrier irons together, these are extremely challenging and after destroying one in its entirety I went off to scratch a replacement, not an exact copy but it will have to do and of course this can be placed on the side which will not be on show in the display case. I think I've got a system now to make these things up but we will see, anyway here is one very quick and not very focused shot with some of the new resin print accessories fitted. I'll get some nice crisp pictures up when the sandboxes go on with their sanding pipes.


    Still lots of cleaning up of solder to do as well.
     
    Last edited: Feb 9, 2019
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  8. SBt

    SBt Full Member

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    I'll scratch around and see if I have some suitible sanding gear. I couldn't see it properly so left that to the modeller (Usually just wire). I'll have a look at some of the piping too and see if it can be reproduced.
     
  9. paul_l

    paul_l Staff Member Administrator

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    Fuse wire is nice and soft and easily manouvered into place

    Paul
     
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  10. Rob Pulham

    Rob Pulham Staff Member Administrator Feature Contributor

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    Paul,
    Boyes stock soft brass beading wire in A variety of thicknesses.
     
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  11. York Paul

    York Paul Staff Member Moderator

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    Thanks Rob, there is a Boyes in York so I'll pay a visit.:thumbs:
     
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  12. York Paul

    York Paul Staff Member Moderator

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    Well the first bogie is assembled as far as I can go today, I've ordered some Form B flat washers 4.3mm x 0.08mm x 9mm which will act as wheelset spacers, they should be here sometime midweek and then I can set to on the brake rigging which can only properly be done if lateral side play in the wheelsets is reduced. Anyway I've fitted the 3D resin print components made by Dundee Paul, these consist of bolster coil springs, axleboxes, brake pistons and sandboxes all held in place with Roket cyano. So here we are with a couple of pictures so far and the next step is to deal with the area in the middle of the bogie frame with includes the swing link assembly with the wishbone leaf springs and retaining plate.


    The etched SKF axle bearing covers are now fitted also, the set with the central hole on the right is for Stones mile counter and odometer boxes, this bogie will sit under the radiator end of the locomotive. So now only one more bogie to go and then focus turns to the bodyframe.

     
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  13. Toto

    Toto Staff Member Founder Administrator

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    Excellent Yorkie.

    Of course when the locomotive moves on to the production kit, these casts will be reproduced in new white metal casts. looking good. :tophat:
     
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  14. York Paul

    York Paul Staff Member Moderator

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    Oh happy days ahead Toto, with retooled castings in whitemetal the weight will return to this fine design of Steve's, it must be said that these resin prints were only ever test prototypes and as this will be a non motorised display model then weight doesn't matter either. Now as a lightweight model it won't fall off the track in its presentation case because I shall solder the wheelsets to the rails so it can never move. We don't let all our secrets out at once. :avatar:
     
    Last edited: Feb 10, 2019
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  15. Andy_Sollis

    Andy_Sollis Full Member

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    Do they need to be? Is it a weight thing? Or could they be done in the resin?
     
  16. Toto

    Toto Staff Member Founder Administrator

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    They could be done in resin but I'm not sure if that would go down well with modellers. I think the more metal the better. Then there is the added bonus of weight. One other thing with the resin is the print time as well.

    To get somebody to print these small parts off in sufficient quantities could be cost prohibitive with regards to their time. Otherwise the resin is fine and would maybe be the way to go for certain casts. Some of the heavier parts, ie, the fuel tanks and battery boxes could have been done in white metal to provide the weight and the rest in resin.

    There are a few dynamics to be considered when choosing the medium. I'm open to suggestions though.

    Toto
     
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  17. York Paul

    York Paul Staff Member Moderator

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    Yes they do Andy and the mass volume of white metal will make all the difference to traction pulling power, O Gauge locos behave more like the full size ones which takes a bit of getting used to. Resin cast / print parts have their uses in some applications like cab interiors and the such and more likely will increase as print technology develops to capture smooth surface detail in an economic way.
     
    Last edited: Feb 10, 2019
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  18. SBt

    SBt Full Member

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    If anyone's got good close up pics of the speedo and mile counter please post. I had to use the standard ones I had and I'm not sure they're right.
     
  19. Andy_Sollis

    Andy_Sollis Full Member

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    OK, I guessed that, but when its just a few small bits I didn't think it would make much difference,.
     
  20. York Paul

    York Paul Staff Member Moderator

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    Andy would you mind sending Terry on another mission at Llan either this weekend or when next he is there... we need close up visuals of the Stones speedo and mile counter, they should be on just the one axle each side of the bogie... I think the one under the rad end of the loco. Cheers mate and much appreciated. Could he also take some same close ups of the 25 speedo gear as well please?
     
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