Bigelov's projects

Bigelov's projects

Postby Bigelov » Thu Jan 16, 2020 2:15 am

I am very much a builder. Maybe that is one of the reasons I am in TT scale after all? So I thought I would start a thread and post projects I am working on or have finished from time to time. I will also link here to my MRH blog posts when I post them irregularly.

A few months ago I got an Anycubic Photon printer and have been working on some TT stuff since then. A lot of it is experimental and has involved a lot of refining of designs, but I pulled a group of prints together into an ALCO RS1:

Image

This is a bit of a cross over with my interest in Russian railways and North American prototypes.
Russia received a group of RSD1's (called DA for Diesel ALCO) as lend lease during the war. This was basically an RS1 above the frame (but with lower profile cab), with three axle bogies and different tanks below. Post war the Russians made their own version (TE1), which was a metric-ated welded version of the RSD1.

The bogie side frames are slipped onto a Tillig BR218 bogie in a similar way to the EMD ones that ConducTTor designed as seen in the Lionel F3 + Tillig BR218 thread (thanks for the idea Alex!). The frame is designed to set the bogies at the right height and have provision for the motor to be screwed in place. It is very tight under the hood and needs to be refined a bit more before I can get it running. The idea is to get the frame machined to this design to provide a solid weighty foundation for attaching everything else.

I'm afraid this has been in the process for a while and I am a long way from the end, so don't expect to see it running any time soon! But it is a lot of fun :smile:
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Re: Bigelov's projects

Postby areibel » Thu Jan 16, 2020 10:30 pm

Nice work Steve!
If it helps I have some castings of a pilot with steps that were originally built for the Kemtron TT RS, they're brass but if you want something lighter you could cast some resin copies. I'll dig one out and post a pic if you're interested
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Re: Bigelov's projects

Postby Bigelov » Fri Jan 17, 2020 3:04 am

Thanks Al,

I would certainly be interested in seeing some photos of that pilot! I have drawn one up but haven't printed it out at all.
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Re: Bigelov's projects

Postby areibel » Fri Jan 17, 2020 9:34 pm

OK!
If you would like a set just PM me your address, I'll send a set along
For reference they're a hair under 23mm wide, 22.9 to be a bit more precise
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Re: Bigelov's projects

Postby Bigelov » Sun Jan 19, 2020 3:55 am

Al,

Its always interesting to see how other people go about making things. I probably wouldn't use those pilots, but they are good to see. Thanks for the offer of posting them my way.

That width (23mm) is very close to the frame width that I have, whereas the pilots were a bit narrower. I noticed the pic in the RS2 thread showing the same pilot installed on a running loco.
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Re: Bigelov's projects

Postby ConducTTor » Thu Jan 30, 2020 3:37 pm

Something that always bothers me on models that you can fix in 3D printing:
The truck brake cylinder(s) arm - make it freestanding...you'll love it.
My website: https://www.ttnut.com
It's the website you're already on. But if you want to be even more on it, click the link.
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Re: Bigelov's projects

Postby Bigelov » Fri Feb 28, 2020 9:04 pm

Hi Alex,

Yes I noticed the brake rods on your EMD bogies were free-standing and they certainly look great that way. The reason I did it like this was so that I could make a mould of the bogies and cast them in resin, rather than printing more of them. I experimented with resin casting a few years ago on a few items with some success, but need to buy some more material.

Originally I drew up roller bearings and plain bearings as separate items with the idea to just glue the appropriate bearings on for the loco that I was making. If you look at the bogie under the cab, it has separate bearings glued on, but it isn't the most perfect fit, so on the other bogie it is all printed in one piece. A brake cylinder may fit better as a separate item, or I may be able to work out how to split the mould around the rod. I will experiment some more!
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