I worked with Walt Gillespie of Rusty Stumps on his Overhead Crane. I went completely nuts after that working on my own version.
This is a semi-early version.
Truck – V1
The early version was created with the intention of having it printed at Shapeways in their Fine Detail Plastic on their Material Jetting printer which uses a support wax .. meaning you don’t worry about things like supports that need designing around.
The bracket sits on top of the channels.
The channels are connected by tubes
The cast guides for the I-Beams are part of the channels
There are only four bearings/wheels and not symmetrical. I am sure I had a reason for this .. that reason has been lost in the depths of time.
Honestly .. I like doing CAD. To me .. it is as much part of the hobby as any of the other parts such as the physical modeling.
Truck – V2 Working
Thought I should post up a “Working” drawing.
I-Beam Guide : I split these into two and made them to fit the opening between the channels.
Separator : I replaced the original tubing separators with separators as this would be easier to print. I extended down from the original brackets.
I added an additional bearing and spaced everything better.
At this point I am still arranging the various bits and pieces so the NBW are all still individual objects.