7mm Scale DJH/Tower Models Streamlined Coronation

Discussion in 'Loco Builds' started by Rob Pulham, Apr 9, 2018.

  1. Rob Pulham

    Rob Pulham Staff Member Moderator Feature Contributor

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    The observant amongst you will note the irony of this post. Hint see the sales and wants section....

    On Easter Sunday afternoon I had a phone call from a gent that puts a lot of work my way 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 have a bash.

    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.

    [​IMG]

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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 when I bought mine.

    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.
     
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  2. Toto

    Toto Staff Member Founder Administrator

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    There's progress for you. Not bad.

    Toto
     
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  3. Ron

    Ron Staff Member Moderator

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    Criticisms aside, that looks a great build so far Rob! :thumbup:
     
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  4. Rob Pulham

    Rob Pulham Staff Member Moderator Feature Contributor

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  5. Is Line Clear

    Is Line Clear Full Member

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    Again nice work Rob... I see what you mean about wrapping a couple turns of thin masking tape around the tyre flanges when soldering up and making clearance for the brake gear.
     
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  6. ianvolvo46

    ianvolvo46 Staff Member Moderator

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    Another fascinating build to watch thanks Rob :thumbup::thumbup:
     
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  7. Keith M

    Keith M Staff Member Moderator

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    I have a DJH "Rebuilt Merchant Navy" "00" gauge kit to build at some point. Criticism has already been levelled at this kit due to the thickness of the loco main frames in Ian Rice's book, doubtless something I will eventually have to get to grips with. Are the loco frame spacers the same as the tender ones Rob? Would soldering an extra layer of scrap etch to the side of each frame spacer (but not over the location tabs), and using higher melting point solder to solder this extra reinforcing layer on, so that it wouldn't melt when using a lower melting point solder (or a heat shunt) to fix tabs to mainframes? It's a B*gger that you have to find 'work-arounds' to overcome design shortcomings that should never have happened with a bit of forethought on their part!:hammer:

    Keith.
     
  8. Rob Pulham

    Rob Pulham Staff Member Moderator Feature Contributor

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    Hi Keith,

    They don't look it - just the opposite in fact.

    I could do as you suggest but it would be difficult to do on the tender retrospectively and very visible too. We must be of a similar mind because I have thought about doing that very thing with the front bulkhead. Which is again half etched, but until I check how the coal chute fits, I have left it alone. Otherwise I make myself a lot of work having to reduce the size of other bit's to take up the the excess thickness.
     
  9. Rob Pulham

    Rob Pulham Staff Member Moderator Feature Contributor

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    Following on from Keith's post above, 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:facepalm: :scratchchin:

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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.

    [​IMG]
     
  10. paul_l

    paul_l Staff Member Administrator

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    Now I know why I should have stuck with 4mm - that would have been 1 blob of whitemetal or lumps of coal.

    Need another bag of popcorn, and a comfy-er seat, ok ready, next installment please Rob

    Paul
     
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  11. Keith M

    Keith M Staff Member Moderator

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    Typical of DJH isn't it Rob. Too light a gauge metal where it should have been heavier, too heavy a gauge metal where it should have been lighter! Have to say, the coal chute/pusher looks the Biz though!
    Keith.
     
  12. Is Line Clear

    Is Line Clear Full Member

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    Never done a DJH kit, the price puts me off Keith and I agree the coal pusher ram looks mint.
     
  13. Rob Pulham

    Rob Pulham Staff Member Moderator Feature Contributor

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    Thanks Gents,

    I am with you on the price of DJH kit's, price wise they are comparable to Finney/MOK but nowhere near in terms of quality.

    That said they have some prototypes not covered by Finney et, al and since David Andrews has cut back his range if you want a Streamlined Duchess they are the only game in town (unless you can find a second hand one of course).

    Regarding the coal pusher once I had worked out that the rods were paired on the inside of the cast clevis points the assembly was fiddly rather than difficult. the key parts have spigots which fo through the base allow almost all to be soldered from the rear. Oddly the most difficult bit to get right was folding it up and soldering the bits together that make up the chute itself rather than the coal pusher.
     
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  14. Is Line Clear

    Is Line Clear Full Member

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    Interesting Rob, very impressive tho.:thumbup:
     
  15. Is Line Clear

    Is Line Clear Full Member

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    I was also recently looking at the Gladiator de-streamlined Duchess kit having read about one recently made by PETER on RMWeb, he was having problems with the resin firebox being too narrow for the boiler diameter, anyway out of curiosity I rang Dave Hill at Littleover as this model is being reintroduced with a new re modified firebox of the correct width and apparently a limited number will be available by the back end of this year. Also a lot of the Gladiator whitemetal castings are being reworked as brass and with a much sharper quality, the price will only increase a little, so I thought quickly on my feet and deduced that I too needed to build up a stash of loco kits for the future. What a shame the missus will have to wait now for the new bedroom carpet until next year.:avatar::D:thumbs:
     
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  16. Rob Pulham

    Rob Pulham Staff Member Moderator Feature Contributor

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    Ha, Ha, I like your thinking Paul,

    I am very fortunate in that Chris supports my policy of buying it while you can get it and loans me the money - the Streamlined Coronation build is to pay off the debt for the B16 and a Fourtrack Models J25 that I picked up recently.
     
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  17. Rob Pulham

    Rob Pulham Staff Member Moderator Feature Contributor

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    Where had we got to?

    Once I had the sides to the right shape and soldered to the bunker rear I set about detailing the front and rear bulkheads. As I mentioned in York Paul's thread 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 of you to lay in a darkened room...:facepalm:) the whitemetal bits.
     
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  18. Is Line Clear

    Is Line Clear Full Member

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    Similarly Lis (my missus) sees making good quality locos as a investment and really gave me some verbal when I bought the Dapol Jinty last year, she called it an expensive plastic toy... little does she know about the Dapol 08 hidden away on shunting duties behind the blanket box. The way I budget for buying kits is because I don't smoke I credit myself that cash value and when I've saved enough I'll buy a kit only then. I so nearly went for a 4F at York the other week, yes Toto was willing me on :avatar: but budgeting for the Hobby Holiday Master Jig won the day instead, at £335 for a 4F I figured better value could be had buying a Scorpio Brit at £365 and I'd still have to get wheels motor and staged gearing. I've factored in for a Duchess at the end of the year, so I'll hopefully meet up with 46254 again after all these years.
    :lol:
     
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  19. Rob Pulham

    Rob Pulham Staff Member Moderator Feature Contributor

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    I look forward to the builds.
     
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  20. Is Line Clear

    Is Line Clear Full Member

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    Thanks Rob the next one would have been a Gladiator 8F but that can go on the back burner for now, I'm just waiting for the nod from Hobby Holidays so I can get on with the mainframes then I'll get the order in with Scorpio for a Brit, Pat Ennis knows I want one.
     

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