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The 1/50 project, A body and lights


Dave John

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My silhouette has been busy.

 

The body is made up of five layers of 10 thou styrene. I find that it is easier to use than thicker section and gives a clean cut which can then be laminated. Also the window relief can be thin. Start with the central three layers, allow to cure overnight between flats, then add the outer layers. It might just be my impression, but I feel that a larger number of thin layers is less prone to warping than thicker layers.

 

The louvres are individual strips on a sawtooth frame. I thought that would be a real hassle but it was just a patience game, letting the first dry then adding the next.

 

 

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These are the magnet assemblies. They go in behind the cab bulkheads and meet tinplate pads on the mainframe.

 

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Lights. My attempt at creating the larger style headlamp, similar to those used on road vehicles. My thinking is that they used a brighter white headlamp bulb and a smaller red lamp (possibly in the sidelamp position) as a tail marker.

The outer part is turned from aluminium bar, the lens from acrylic rod. Back flattened with a ridge in the middle, so that the leds can be cyanoed face down. The white is a warm white chip. Very little current is needed to give a realistic light level. Output from the control board is 4.5V, I found that a 6k8 resistor with the red leds in series and a 6k8 resistor for each of the white leds to be quite sufficient.

One thing I discovered, the easy way to polish acrylic rod is toothpaste. Squeeze some on a bit of paper and happily polish away.

 

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Ok, this a pic of No1 end. You can see how the magnets are glued to the bulkhead and hold the body down to the mainframe. The other end of the magnet is the feed for the lights, it is just held there by the magnet. There is a similar layout at No2 end, the wiring is all glued to the bodyside, the resistors are mounted on a bit of vero.

 

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A pic of the body on the frames. Reasonable progress, I am happy with the way the lights look and the overall feel of the thing. Body removal for battery change is easy, the magnets giving a good hold but not too firm.

 

 

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Next stage ,  cab detailing and add a roof.

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I'm impressed with how easily the design and build of this modern haulage power comes to you, Dave, considering your other interests. I wouldn't know where to start. Do you have a past modelling post-steam stuff?

 

Thanks for the tip about toothpaste and acrylic rod, the things we learn on here 😀

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Thanks Mikkel.

 

Oddly it is the Caledonian stuff that I have to research more comprehensively since I never saw any of it first hand. I have been involved with engineering and construction since the 1970s so a loco from the late 1950s is something I have experienced and worked on.  That gives me an understanding of what is generally needed and  so the design of the model just follows the logic of the real thing.

 

The internet is a great help, I have accumulated quite a lot of drawings and photos of locos of this nature, since it is freelance I can just take the features I fancy and use them. 

 

I did want this project to be an ideas testbed, that is a lot of the fun of modelling for me. 

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