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Stour Valley Dream - Building bridges

Fen End Pit

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I've made a start on the girders of the river over-bridge at the Cavendish end of the station. This bridge is still there but one of the girders has been removed. There are two distinct bridges, one with very conventional plate girders which supports the running lines and another bridge with really odd cast girders which supported the original coal siding, removed by the time I'm modelling.

 

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One of the difficulties that I'm facing is that, as is inevitable, I've had to compress the overall length of the station slightly. This means that the bridge is actually slightly shorter than it ought to be. So I'm trying to compromise and make something that looks right, rather than a slavish millimetre accurate model.

 

I've drawn up the girders in CAD and printed them out on my new Anycubic Photon resin 3D printer.

 

I'm really happy with the way the girders came out, the rivet detail is crisp and I think pretty convincing.

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Taking a look at the girders and the difference between two difference types of girder is very obvious. I can see from the photographs that I need to do a little bit more filing to do to remove the last of the facets from the layers of printing.

 

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I think I may end up reprinting the main girder with the walkway and mounts for the handrail.

 

Still, happy with the progress.

 

David

 

 

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Very nice, David. It seems that 3D printing is a very useful tool, indeed. A couple of thoughts though. The rivets just look a little too prominent to my eyes. If they're the right diameter, perhaps its that the prototype are domed and the printed ones cylindrical?

With the old, cast girders, they look rather too close together to have carried track. Was it just a pathway?

Dave.

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1 hour ago, Dave Holt said:

Very nice, David. It seems that 3D printing is a very useful tool, indeed. A couple of thoughts though. The rivets just look a little too prominent to my eyes. If they're the right diameter, perhaps its that the prototype are domed and the printed ones cylindrical?

With the old, cast girders, they look rather too close together to have carried track. Was it just a pathway?

Dave.

 

Thanks for the comments.

 

The rivets are .6mm diameter and .6mm tall and I have drawn them with a rounded top. I might try making them slightly smaller but it is a balance between too big and not coming out at all.

The cast girders were positioned one either side and one between the running rails of the siding - I said it was odd!

 

David

 

 

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Similar design to one at Stand Street on the Braintree / Bishop Stortford branch.1345470702_2014-02-1114_24_22.jpg.02476186737fbba0c48782f1edfc46c4.jpgJim1784303300_2014-02-1114_23_21.jpg.6cf30efc3b0668945ab03b8ddfd4a1b8.jpg369725255_2014-02-1114_23_18.jpg.380faa6660957e779c1b5995d6db36fe.jpg993905948_2014-02-1114_23_06.jpg.4ce8ba48524460053e0b8704e4c6aa6f.jpg1345451677_2014-02-1114_22_55.jpg.33d530e0b6eb49823b1e09583c81ec18.jpg

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On 06/03/2019 at 12:29, Fen End Pit said:

 

Hello David 

I got your email via BRM last night ,I hope you received my reply if not try again please. I did include my phone number if its easier to talk direct  Best Wishes Alan.

 

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