Steam engine designs?

Forum about the OS-Railway project available on Thingiverse. Here you can ask questions, look at building pictures, share ideas, pictures and STL's.
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Joined: Sat Oct 10, 2020 6:56 am

Steam engine designs?

Postby florint » Tue Dec 08, 2020 8:28 pm

Hello there,

I'm in the process of printing and assembling the tracks and a few of the cars for my son (4 yr old). I really, really appreciate the amazing work you've done with this system and I am very thankful for you to share it with us all.

I was wondering if anybody created a steam locomotive model, something similar to this:

I like how the pistons move and push the wheels - you can see it in this customer video: ... _vse_rvc_0

I would really like to build something like this for my son but I don't have the CAD skills to build such a model. I would be willing to pay for a nice model like the one in the picture with moving parts and everything. Did anybody created such locomotive for the OS Railway?



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Posts: 409
Joined: Thu Jan 11, 2018 7:46 pm

Re: Steam engine designs?

Postby admin » Wed Dec 09, 2020 2:17 pm


Steamers are really nice! :) I guess you've seen this project on Thingiverse?
I don't know of any working steamer for my project, and there are a couple of important things to keep in mind.
The first one is the track radius. My track could be compared with the track used for trams, where they sometimes have really tight turns to be able to navigate a city, compared to the tracks used for long distance trains with very large curves.
tight_turn.JPG (80.53 KiB) Viewed 1343 times
Here is an example of a chassis I'm working on right now and in the picture I'm doing a test to see that my calculations of the turning capability is right. You can quite easily tell from that picture that a long steam locomotive with several pairs of wheels would have no chance at all to run on that track.

However, something like this could work fine:
steamer.JPG (35.12 KiB) Viewed 1343 times
This is in G-scale so bigger than mine (think it's 1:22,5 and mine is 1:45) so you need to scale it down in the slicer, but if I were you I would try to print this one just as an experiment. I would look more to the distance between the wheels (the edge that touches the inside of the track) than the actual scale and scale it down there. My track is 32mm width on the inside, and you need a bit of extra clearance to be able to turn so maybe 30-31mm would be OK. (but not too narrow so any of the wheels can fall of the track on the inside).

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