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DLR train scratchbuild - On Members Workbenches. - More Practical Help - Your Model Railway Club
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 Posted: Mon Mar 21st, 2011 03:32 pm
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Burkitt
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The DLR opened about a fortnight before I was born and I've been a fan of it since my first trip not many months later. Having gained a bit of confidence in scratchbuilding recently I thought I'd have a go at making a second generation DLR unit out of styrene.

I cut the sides out by gluing a print-out of a scale drawing to the styrene using Pritt Stick, then peeling it off once done. I reckon this is faster and more accurate than copying all the measurements to the plastic with a pencil and ruler.



Each side is actually a layer of 0.75mm styrene stuck to a layer of 0.3mm styrene with more Pritt Stick. Once cutting was complete I separated the layers, which will form and inner and outer skin with space for the glazing in between.

The two ends are also made from two layers, but with the thin sheet glued permanently to the one beneath to provide a recess in which the flush glazing will be fitted later.



Most of the interior detailing will be attached to the chassis, but the draught screens are part of the body as they keep the sides to the correct sloping profile and add a lot of strength. I glued them to the roof with square rod to ensure they were perpendicular.



I then added the 0.75mm styrene inner layer of the bodysides and the ends.



Next I will need to add spacers to leave a gap for the glazing, then the outer layer.



The chassis will be a separate unit, and will include the articulation between the cars.

Paul

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 Posted: Mon Mar 21st, 2011 03:46 pm
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Robert
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Great so far Paul and I'm really looking forward to see it continue. You make it look easy.



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 Posted: Mon Mar 21st, 2011 08:44 pm
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MaxSouthOz
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Looks good, Paul.  Can you tell us how you do your cut outs?



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 Posted: Mon Mar 21st, 2011 10:05 pm
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Burkitt
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Hi Max. I used a craft knife to cut out the straight sides of the windows, and just cut an angle for the corners. Then once I'd popped the middle out I used a small round file to give the corners their proper shape.

For the spacer layer I have used the same transparent plastic as for the glazing, ensuring it will be the correct thickness. The plastic was from an old sheet which had got scratched to minimise waste.



I then stuck the outer skin over the spacers. Once it's really dry I'll give it a bit more finishing and cleaning up.



Next I think I'll do the chassis to help keep everything straight and rigid.

Paul

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 Posted: Mon Mar 21st, 2011 10:17 pm
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MaxSouthOz
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Thanks, Paul.  Did you use MEK?  I did one in 3mm 2mm and 1mm styrene and had all sorts of problems keeping everything straight.

http://yourmodelrailway.net/view_topic.php?id=6870&forum_id=14

 



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 Posted: Mon Mar 21st, 2011 11:05 pm
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Robert
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You can host your model railway pictures on here Paul, most of the membership do and it doesn't cost anything.



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 Posted: Tue Mar 22nd, 2011 10:54 am
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Janner
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This is a great project Paul, I shall be following developments of your DLR train with great interest.  I worked in Docklands for a while in the early '90s and often rode the "Hornby Dublo" as it was called by some people, presumably because it was 3 rail and driven by remote control.

May I ask where you got the drawings of the DLR stock, I have been looking on and off for a while but have never found any.

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 Posted: Tue Mar 22nd, 2011 11:32 pm
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Burkitt
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Max, that NR diesel is amazing. I have used EMA Plastic Weld rather than MEK, but yes I do find there can be problems with distortion. In some places the very thin styrene has also sort of melted where I've laminated it over another layer, leaving a rough surface which will need some filling.

Robert, thanks for mentioning hosting pictures on the forum. I tend to use Google Picassa because I can upload straight from "My Pictures" by right clicking.

Janner, I'll send you a PM re the drawings.

Today I've made the chassis of the unit. Each section is formed from two layers of 2mm styrene to make it nice and strong, with the side skirts adding extra rigidity.



The front chassis is upside down, the hole is to allow space for the bogie wheels. I'll trim the ends of the skirt later.



The fit is OK but still needs some work to make it perfect. A couple of crosspieces in the body will keep the bottom of it from spreading and be hold the nuts which the screws holding the chassis on will go into.

Paul

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 Posted: Wed Mar 23rd, 2011 07:43 am
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MaxSouthOz
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Thanks, Paul.  I'm stuck with MEK as I haven't been able to find Plastic Weld here in Oz.



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 Posted: Wed Mar 23rd, 2011 12:27 pm
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Wayne Williams
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Burkitt wrote:
In some places the very thin styrene has also sort of melted where I've laminated it over another layer, leaving a rough surface which will need some filling.

Paul,
I would be interested in how you fill in, or smooth out, these small rough surfaces. I get them at times also and I am not satisfied on any of my "fixes".

Wayne



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 Posted: Wed Mar 23rd, 2011 06:14 pm
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51J
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Janner wrote: May I ask where you got the drawings of the DLR stock, I have been looking on and off for a while but have never found any.

Hi Paul

Like Janner, I would be interested in dimensions for the DLR stock as it is something I pondered for some time now with the tight radius and multi level tracks.. plus the locations are interesting to model.


Regards
Tom

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 Posted: Wed Mar 23rd, 2011 08:52 pm
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Burkitt
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Wayne, I'm using Sqaudron white filler for smoothing minor irregularities in the surface. It can be quite porous and tends to need a couple of applications with sanding in between.

Tom, I'll send you a PM about drawings.



Today I've added the seating to the chassis. My model depicts a refurbished train with two rows of forwards facing seats at the front and two seats on each of the inwards facing benches. The seats behind the rear doors will be attached to the body above the crosspiece.

Paul

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 Posted: Mon Apr 4th, 2011 10:03 pm
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Perry
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MORE PLEASE!!!!!! ;-):mutley:pedal

Perry



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