Class 15 - one of mine.

Discussion in 'Kits, Kit bashes & Scratch builds' started by SBt, Dec 25, 2018.

  1. SBt

    SBt Full Member

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    One thing I've never owned in the 21 years I've been trading is a model of my very own. In fact I don't think I've owned a loco that I could call my own in nearly 30 years. I've built over a 100 but they've all been for other people or as demonstraters, some to raise money. This Christmas I decided that was going to end and a stock check earlier this year unearthered two class 15 kits. So I put one aside for me. This is going to be mine!

    These days I'm not a great builder, and the fact I've been using the wrong solder for years doesn't help. But with 143deg solder and some advice from proffesional builders and Pauls great work on here, felt a bit more confident.

    I started this morning and so far four hours work has produced two sides, two headstocks and two parts dropped on the floor which I can't find.

    The initial construction is laminating the etched side frames together. The 15 had a distinctive array of rivets and so when I designed the kit felt this was the best way to reproduce them. They need to be carefully aligned and wire through the holes each end helped this. It was then a case of adding the flanges which can be quite fiddly.

    Finally I constructed the headstocks and after dinner will be putting them together and hopefully having it running.

    1 25th December 2018.jpg 1a 25th December 2018.jpg 1b 25th December 2018.jpg 1c 25th December 2018.jpg
     
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  2. Toto

    Toto Staff Member Founder Administrator

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    Terrific Steve. You don't half pick s day to start this. :avatar:

    Have a good one. :thumbs:
     
  3. York Paul

    York Paul Staff Member Moderator

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    Lovely start Steve :tophat: I never knew you have not kept examples of models you designed.
     
  4. mydadstoys

    mydadstoys Full Member

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    A nice start Steve. I always admire modellers who build a locomotive or wagon from kits form.:tophat:
     
  5. SBt

    SBt Full Member

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    Tonight I worked on some of the sub assemblies and also prepared the first fix required to get the bogie running. This involved soldering the motor bracket to the centre stretcher and then one of the headstocks. The design forces the motor to the outer side of the axel which is unusual. The reason for this is so that the upright motor clears the cab. When mounted it will sit quite nicely in the compressor housing. I haven't bothered fitting Delrin chain because I only have a small layout, but it can be easily fitted and you can see the rebates in the stretcher to allow the chain to pass through.

    The motor plate sits into the notches and slides up and down to get a perfect mesh and allows a number of gear ratio's to be fitted. Here I'm using Markits 26:1. You can omit this whole assembley and fit a motor and gearbox unit of course, it's not critical to the structural integrety of the bogie. The wheelsets (Roxley Mouldings 3' 3") were primed and left to dry. Once they're painted I can put the bogie together.

    Lastly I made up the rather fiddly brake guards. These sit under the hangers and protect them against damage. They can be seen on the prototype quite clearly.



    2 26th December 2018.jpg 2a 26th December 2018.jpg 2b 26th December 2018.jpg 2c 26th December 2018.jpg
     
    Last edited: Dec 26, 2018
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  6. Toto

    Toto Staff Member Founder Administrator

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    Hi Steve,

    A question. How do you get the gear position on the driving axle. ( I've never done it so apologies if the answer is obvious ). I still have to order some wheels in yet for my diesels. :whatever:

    Looking forward to more.

    Cheers

    Toto
     
  7. SBt

    SBt Full Member

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    Generally I fix the motor with worm to the motor plate then position that on the bracket. I then centre the gear on the axles and mesh to two together using tissue paper between to get a good seat. I'll do this later - you'll see it. On the Classs 26/27 you would use a motor/gearbox combination.
     
  8. Toto

    Toto Staff Member Founder Administrator

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    Thanks for that Steve.

    Tot
     
  9. York Paul

    York Paul Staff Member Moderator

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    And if you stick one of these in Toto it will go faster than the fastest Heljan Class 33 ever made. :avatar::avatar::avatar:
     
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  10. Toto

    Toto Staff Member Founder Administrator

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    Where do you get these beasts then ? I'll sit down before you mention the price ..... at two per kit. :facepalm:
     
  11. York Paul

    York Paul Staff Member Moderator

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    MSC and use your GOG number to get the correct price if you want something beafy to go in a Clan, its a JH Motor with 26:1 ratio double reduction gear. It won't fit a diesel bogie... MSC do a diesel traction motor but they are pricey. I use Taff Vale's own five pole skew wound 1833 motor at £17.50 and 20:1 single gear with worm from Roxey at about £11 a throw. Speak to Sue at Taff Vale but don't mention the NSR M Class kit as I haven't had chance to send her the dosh yet.
     
  12. Toto

    Toto Staff Member Founder Administrator

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    I'm assuming the MSC with double reduction gearbox wouldn't be used in diesels then ? Not to mention flywheel.
     
  13. SBt

    SBt Full Member

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    That would look nice in mine but I kept things more simple. Here is the motor/gear set up as designed with live chassis and nickle silver wipers on pospher bronze strip as pick ups on the insulated side. The first thing I do is add some extra tabs to the Mashima connecters as they are a bit on the small side. The two extended wires will go off via a connector block to the other motor. I test ran it and it works a treat.

    Bonus point of the day was not doing my usual trick of mixing the live/insulated wheelsets and thus causing a short - I'm getting better.

    3 27th December 2014.jpg 3a 27th December 2014.jpg 3b 27th December 2014.jpg 3c 27th December 2014.jpg
     
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  14. Toto

    Toto Staff Member Founder Administrator

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    I like the pick up idea. The whole bogie looks a reasonably straight forward build. :thumbs:

    Cheers

    Toto
     
  15. York Paul

    York Paul Staff Member Moderator

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    No this motor is for 70010 Owen Glendower... it is way too big for diesel bogies... an ordinary 1833 will do nicely with or without Delrin chain drives. Now beware Steve wires his builds as live pick up on one bogie and negative return on the other... there is nothing wrong with this and the PRMRP Hymek conversion kit also takes power this way, BUT I wire mine with insulated pick ups on each side of the wheel using either phosphor manganese strip or sprung pick ups since I opted for Slaters wheels (eleven spokes for the NBL remember supplied only by Slaters), Steve uses Roxey wheelsets which are all metal and insulated on one side only thus one bogie is always live whilst the other returns current... insulation between the both is made over the bogie pivot bearers. You will need to check which system works best for you since Luib and Another Bridge are DCC layouts.
     
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  16. Toto

    Toto Staff Member Founder Administrator

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    I'll need to consult his nibs. I think your system with insulated axle and pick up coming from each wheel on both sides is what's run on what we have at the moment ..... Could be wrong though.

    Thanks for pointing that out. What about gear boxes if using the mashima motors ?

    Apologies ..... just looked at Steve's. A simple gear fitted to the axle. A smaller size flywheel would suffice as well I'd think.

    Cheers

    Toto
     
  17. SBt

    SBt Full Member

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    Now the 26 and 27 are sorted I was able to return tonight to a couple of hours doing some real modelling. And so put together the other class 15 Bogie.

    I also changed the order in which it's constructed. After laminating the sideframes I then added the axlebox guides and the the two vertical stiffeners. This helped the placement of top and bottom flange that creats the 'C' beam construction. I found this was a far quicker way of construction.

    This answer the question why I don't test build before I write the instructions as it's the eigth time I've built this type of bogie and have only just realised this way's better. :facepalm:

    4 10th January 2019.jpg 4a 10th January 2019.jpg
     
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  18. mydadstoys

    mydadstoys Full Member

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    :hismiley:My hat goes off to you guys who can solder to make such brilliant engines. Your thread is interesting and it’s one I will follow.:tophat::thumbs:
     
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  19. SBt

    SBt Full Member

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    I struggled to solder for years and years until I discovered 143 Deg material. I haven't looked back allthough I still need to improve.
     
  20. Toto

    Toto Staff Member Founder Administrator

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    Coming on Steve. I'll be able to use this thread in order to aid my own build.

    Cheers

    Toto
     
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