7mm DJH Streamlined Coronation.

Discussion in 'Area 51' started by Rob Pulham, 26 April 2018.

  1. Rob Pulham

    Rob Pulham Western Thunderer

    Isn't life ironic, after choosing the David Andrews Kit over the DJH offering and subsequently putting it up for sale I had a phone call on Easter Sunday afternoon asking if I could fit in building a DJH Streamlined Coronation as soon as possible. The gent that I am building the J6 for is in no rush so I decided to give it a go.

    The kit was dult delivered on Sunday evening and by bedtime I had the basic tender chassis together.

    Another couple of hours on Monday morning had the tender chassis complete, so far so good.

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    To a degree I feel that any criticism that I make of this kit is a bit like sour grapes given that I chose the David Andrews kit over the Tower/DJH version .

    That said, hiding what I find doesn't help anyone else who may decide to build one of these.

    The key issue with the tender chassis is that the cross members that fit between the wheels are a single half etched layer in the middle section, which makes them very vulnerable to bending. This and other areas where key parts are a single half etched layer (more on that later) are particularly noticeable to me when this build comes right on the heels of building the MOK LMS tender which is prototypically similar in many respects.

    Although I don't know the name of the loco that the model is to ultimately represent I have been asked to build it as one of the double chimney red ones - Apparently there were some differences on the red ones over the first few blue ones (I had originally planned to build mine as Duchess of Hamilton in Blue when Coronation was masquerading as DOH while DOH went to America masquerading as Coronation, confused yet.....). Luckily the kit also came with a loan of the Wild Swan/NRM Loco Priles book for the Coronation Pacifics.
     
  2. Rob Pulham

    Rob Pulham Western Thunderer


    Making a start on the upperworks, the tender sides are battleship plate thickness. They come pre bent to shape to follow the bulkheads - what a shame the bends were too low

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    I used my my cheap cooks torch bought from Lidl just before christmas. I have found it's too hot and uncontrollable for soldering but it's great for annealing.

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    However, before you get to the tender sides in the instructions, the next section has you making up the coal chute and coal pusher which went together perfectly.

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    Last edited: 27 April 2018
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  3. Dikitriki

    Dikitriki Flying Squad

    That's a very good recovery on the sides Rob:thumbs:
     
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  4. Scale7JB

    Scale7JB Western Thunderer

    Wot Richard said..!

    JB.
     
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  5. mickoo

    mickoo Western Thunderer

    Agreed with the above, question is though, is it the sides that were wrong or the bulkheads?

    MD
     
    Last edited: 28 April 2018
  6. Rob Pulham

    Rob Pulham Western Thunderer

    Thanks Gents,

    All though not easy I am sure that it helped coming so close on the back of doing the bends on the 06/8F tender.

    Hi Mick,

    I couldn't honestly say which was out, it all seems to fit better once the sides were reshaped. If the bulkheads are indeed wrong the remit is to build it out of the box so I am not attempting to correct any errors unless it's needed to get it built.
     
  7. mickoo

    mickoo Western Thunderer

    You'll only find out when you build the cab and put the completed engine next to the tender I'm afraid, by then it'll be too late.

    Just a heads up that's all.

    MD
     
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  8. Rob Pulham

    Rob Pulham Western Thunderer

    Thanks Mick,

    I hadn't thought of that. If it is the bulkhead that's out then you would expect every other Tower/DJH Coronation to suffer the same fault. Fingers crossed it was just a dodgy bend by who ever prepared the kit.
     
  9. Rob Pulham

    Rob Pulham Western Thunderer

    Moving swiftly on.

    Once I had the sides to the right shape and soldered to the bunker rear I set about detailing the front and rear bulkheads. I fitted all the whitemetal castings to the rear bulkhead prior to fitting it. Those on the front bulkhead await fitting.

    in true perverse DJH fashion, although the front bulk head and many of it's constituent parts are half etched the rear bulkhead is full thickness.

    Front Bulkhead
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    Rear Bulkhead
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    Streamlined Cover and Ladder for the rear of the Tender.
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    Dealing with the thickness of the metal has been a real learning curve on this one because my 80 Watt Ersa solder station won't touch it with 145 degree solder at my usual 340 degree setting.

    I have had to whack it up to 400 to get the solder to run. This has meant that much of the soldering has been done with the microflame including (and this may want some to lay in a darkened room...) the whitemetal bits.

    I have discovered that my Iroda Solderpro on its minimum setting is perfect for soldering whitemetal castings on with 100 degree solder. The hardest bit is cutting the 100 degree solder into manageable chunks without bits flying off into oblivion.
     
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  10. michl080

    michl080 Active Member

    Rob,
    I melt a nice chunk and drop my vice on it.
    That's what I get:
    IMG_5758_sml.jpg

    The result is less than a mm thick. It can be cut into tiny bits using scissors.

    Michael
     
  11. Steph Dale

    Steph Dale Western Thunderer

    Or melt it with your soldering iron and flick it into water...

    Steph
     
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  12. Rob Pulham

    Rob Pulham Western Thunderer

    I shall give both suggestions a try. I must admit prior to this build I never really got on too well with 100 degree solder but I have certainly revised my opinion of it and it now gets a big thumbs up:thumbs:
     
  13. Rob Pulham

    Rob Pulham Western Thunderer

    Once the rear bulkhead was soldered in, next up I concentrated on getting the many details on the rear of the tender added.

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    It's quite busy back there...
     
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  14. Rob Pulham

    Rob Pulham Western Thunderer

    Following on as you might expect from detailing the rear I started adding to the front Bulkhead and the Inner coal space.

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    Now getting nearer to the finish line for the tender at least.
     
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  15. Rob Pulham

    Rob Pulham Western Thunderer

    The final chapter on the tender ended on the following Saturday morning.

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  16. Rob Pulham

    Rob Pulham Western Thunderer

    So it's onto the loco chassis,

    I made a start on Saturday afternoon and by the Monday night I had made it to

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    Which brought me to the end of drawing number 2 of the chassis instructions.

    I made one minor error in that I got one of the chassis spacers/supports the wrong way up which meant that the hole for the brake cylinder was in the wrong place. Rather than take the chassis apart again I just redrilled the hole at the other end of the spacer and filed the tabs of a couple of brackets that should have fit into some slots. Job done and brakes fitted as they should be.
     
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  17. simond

    simond Western Thunderer

    Rob,

    Do any of the punched-through rivets show on the frames?

    Btw, between you and Peter (PAD) I’m getting loads of info & ideas about how my resurrection should look - thanks!

    Best
    Simon
     
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  18. Rob Pulham

    Rob Pulham Western Thunderer

    Sorry Simon,

    I am not sure what you are asking by show on the frames?
     
  19. simond

    simond Western Thunderer

    Rob,

    In the second picture in post 16, there are lots of half etched rivets on the inside of the frames, and I wondered if these were visible on the outside once pressed through. It seems to me that many of them will be behind wheels, etc, and I’m interested to know if there are any which I need to somehow try to replicate on my Duchess.

    Best
    Simon
     
  20. Rob Pulham

    Rob Pulham Western Thunderer

    Ah got you, sorry - I was working on the election yesterday so it had been a long day. If you click Here will take you to high res versions that you can zoom into. But as a minimum there are lines of double rivets adjacent to the front/rear drivers that are very visible.

    Clicking on the image below will help in the first instance - both sides are the same.

    IMG_8233.JPG
     
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