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Model inverted truss bridge for HO scale model trains

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Creation quality: 0.0/5 (0 votes)
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  • 1.2k views
  • 1 download
  • 1 collection

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3D design format
STL Folder details Close
  • Base_assy_125.stl
  • Base_assy_170.stl
  • Rail assy A.stl
  • Rail assy B.stl
  • Top_cross_assy_23.stl
  • Top_cross_assy_35.stl
  • Top_cross_assy_45.stl
  • end L profile 37mm .stl
  • side assembly A.stl
  • side assembly B.stl
  • top L profile 37mm .stl

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Publication date 2022-11-01 at 18:33
Design number 907936

3D printer file info

3D model description

This is a model of a "fishbelly" bridge that I desIgned and printed for a friend. He is using it with HO scale model trains. it is 300mm long. It is designed to use 4mm steel rods for extra strength. However, it also supported ovr 1.5Kg without. I recommend to use the rods anyway.
It is fun to assemble too and I have included instructions.
PLEASE NOTE that the photos are of the prototype. The photo of the kit is the final version but I am waiting for my friend to assemble it and paint it so that I can post photos!
Designed with FREECAD
Used Ultimaker Cura slicer
I REALISED TWO FILES WERE WRONG. ADDED CORRECT ONES TODAY 04/07/2023!

3D printing settings

I printed quite slowly at 35mm/s (but could be printed slightly faster depending on the printer) and 0.15 resolution.
I printed with supports. infill 30%. However, It is mainly walls and top/bottom layers so infill is practically irrelevant.
The model does need supports but I used zig zag supports (ultimaker cura) and they came away very easily.

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