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3D Printed Brass Objects: N Gauge Class 139 and z3 gauge Hunslet

Will J

Entry posted by Will J

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You may recall in a previous episode I was pondering the best scale combination to use T gauge mechanisms and track to represent narrow gauge, balancing a 1:148 scale carriage on 3mm track.

http://www.rmweb.co.uk/community/index.php?/blog/351/entry-15589-n-gauge-narrow-gauge-0165-009-this-must-be-n3/

 

It turned out a 1:148 model of a 2' gauge carriage was a bit large on what scales as 15-18" track. So a plan B has emerged, using Shapeways' 'Raw Brass' printing service, I have created a 1:220 scale quarry Hunslet, or at least the modern incarnation with cab as seen on many preserved lines. Stuck to the back (about to be Dremmeled off...) is a vaguely Corris-esque carriage with bench seats inside (honest).

 

http://www.rmweb.co.uk/community/index.php?/blog/351/entry-15589-n-gauge-narrow-gauge-0165-009-this-must-be-n3/

 

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The process (which took about 2 weeks) starts off with a 3D print in modern casting wax, then takes a pleasingly old school diversion through traditional lost wax casting to produce the finished product.

 

At the same time, I also got a nice, heavy version of my N Gauge Class 139 body printed/cast in brass as well. The extra weight should aid pickup as well as provide a better final paint finish, hopefully...

 

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D869

They look really good Will. Certainly food for thought in terms of what else 3d brass might be useful for.

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Mikkel
  • RMweb Gold

Hi Will, I'm always prepared to meet the unexpected when visiting your blog! You must be learning a lot of techniques with these experiments, it's fascinating stuff.

 

I'm disappointed about the couplings though, I had thought you'd be using 3-links ;-)

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TomE
  • RMweb Gold

Top stuff Will, an interesting way of getting weight into smaller scale models! 

 

Is there any sign of the original 3D printed mould on the final brass models?

 

Tom. 

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Will J

Thanks all.. Mikkel, couplings are still a mystery for the narrow gauge stuff, my usual bent paperclip solutions are going to look hellishly big! I do, however, have an etched brass coupling for the front of the Class 139, if you look at the prototype, there is a little red tongue sticking out of its mouth on the front valance, which allows one vehicle to rescue the other if it gets stuck down the branch.

 

Tom... photos to follow (extreme close ups)!

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BernardTPM

I would have to say that 1:200 scale would be the most obvious 'two foot' scale gauge combination for 3mm track. Neat little brasses though.

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Will J

Funny you should say that Bernard, I have an oddly scaled 200th scale Mini that would look nice on the road at the side of the track. The choice of 220th scale is purely to make use of commercial Z gauge figures etc....

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brislex

I suspect this has been asked on one of the other posts, but I can't find it - are you able to make this available to the public on Shapeways?

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