This is a view of the assembly process of the 3D-printed motorized bogie for my EMD GP38-inspired locomotive published on Thingiverse:
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The new motor bogie design can use much larger motors and incorporates a 3D-printed gearbox with 10:1 reduction. It is mounted to the chassis with a ball joint so that it always has all 4 wheels on the track even in slopes, which means the forward bogie ensures sideways stability.
Read more about the OS-Railway project here:
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