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Re: The Bridge

Postby dkightley » Wed Apr 02, 2014 11:38 pm

Another component drafted out. Needs detailing, hollowing out and a mounting insert designing...but we're getting there!
IMG_0975_red.JPG
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Let me see....I'll need thirteen of them. 8-)
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Re: The Bridge

Postby dkightley » Sat Apr 05, 2014 12:32 am

After many hours of 3D detailing work, I finally have some textures on the viaduct supports. Here's the before and after...and the after version took a whopping three hours to print!!
IMG_0977_red.JPG
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Re: The Bridge

Postby Slarge » Sat Apr 05, 2014 9:23 am

Woah! :shock: you modelled all that texture? How?
Seriously how? Are they truncated pyramids or something?
Bricks are things we would never even consider modelling at this scale when making architectural models 3D viz, 3D for Printing or the Old school scalpel scored cardboard.
You just pushed the boundaries of modeling at this scale yet again!
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Re: The Bridge

Postby dkightley » Sat Apr 05, 2014 10:44 pm

Basically, I found out quite quickly that at this scale we have to design not for the detail....but for how the printer prints.

To illustrate this, here's what the model looks likes in my 3D package:
TextureDetail.jpg
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Compare the 3D model with the finished article. They're similar...but to get the end result, I have to exaggerate some of the surface shaping. And the rest is down to sheer trial and error!

And getting that level of detail for brickwork took hours and hours of repetitive dividing lines up and joining the dots! And then every sticking out node (forming the centres of the bricks) was moved out individually!
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Re: The Bridge

Postby tjejojyj » Sun Apr 06, 2014 9:21 am

That looks really good. From the first photo it looks like you have copied a 'block' pattern about ten times up the column.

(I was just thinking about asking whether such surface texture was possible at this scale as it is a facet of the Landwasser Viaduct.)
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Re: The Bridge

Postby martink » Sun Apr 06, 2014 10:53 am

What you are doing is very, very impressive. While 3D is pretty much essential for the complex ironwork, have you considered using more traditional modelling techniques for simple bits like the pillars? The old trick of sticking suitably embossed plasticard onto wooden piers springs to mind.
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Re: The Bridge

Postby dkightley » Sun Apr 06, 2014 4:19 pm

With wanting to get as near to true scale as possible, I only thought of using 3D modelling to get the level of results I was looking for. And it also allows me to produce pre-production parts so I can make absolutely sure things fit together exactly how I want.

For example, with the tower "hot off the press", here's an example of all pre-production parts assembled together for the first time! And with the HST placed almost in the right place, it gives an ides of the scale of the structure.
IMG_0983_red.JPG
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There's four separate parts here...all of which are not in their final form, but knowing they fit together, I can press on with the time consuming detailing.

btw This tower is actually the largest single component volume-wise in the whole bridge! And it happens to be a key component in the design, as I now know exactly how high the track bed will be above the waterline...so I can now work on the roadway sections for the centre tower, which I have partly produced.

I had doubts as to whether I would be able to pull this project off. I'm starting to feel slightly confident that I might just succeed!
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Re: The Bridge

Postby peterg » Sun Apr 06, 2014 8:16 pm

Seeing the parts together...with the train, just confirms how great this will be.
I think we will be seeing you in a magazine with this one at some point!!
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Re: The Bridge

Postby peterg » Thu Apr 10, 2014 7:27 pm

Doug

Just a thought to the future when you need to be thinking about how you transport, join adjacent sections for display etc.

I came across these people and they look to have a damned good selection of all those nifty little fittings that i think you might need....especially the board joining /dowelling systems;

Peter Reid at,

Station Rd Baseboards
Station Rd
North Elmham
Dereham
Norfolk
NR20 5HH

Tel: 01362 - 668457

Pete
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Re: The Bridge

Postby dkightley » Sun Apr 13, 2014 11:51 pm

Superb heads up on Station Road Baseboards. I've added a link to their website on the suppliers page.

And I've started thinking ahead about the issues of transporting the layout. I'm getting a towbar fitted on my car....and will start keeping an eye out for a decent second hand trailer in a few weeks time.

I think I've settled on the layout board being in 1 metre x 0.6 metre sections with the bridge sections being lift-off for transport. This should allow me to build a frame to support the sections...and to fit a canvas cover onto for the trailer!
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