Train IV: Purple
Track Gauge: 26mm
Number of components: 501
Design Time: 25h
Print Time: 40h
Assembly Time: 15h
Printer: Creality CR-10
Nozzle Diameter: 0.2mm
Upgrades over previous generation:
- Completely overhauled the wheel and steering assemblies to increase bogie rigidity and maintain consistent track gauge
- Reduced complexity and overall length of hitch assemblies by replacing the old-gen bearing and U-joint with a tie rod ball joint
- Improved physical detail by individually printing each colored component and painting separately prior to assembly
- Introduced stadium seating to the three across configuration
- Reconfigured restraints to incorporate over the head lap bars instead of all previous generation's T bars
Some initial renders of the bogie and axle assembly, seat, spine, and chassis baseplate - all taken in Fusion 360.
Each fourth generation bogie assembly is composed of 30 components. The brass U rods replace pins which were previously glued in place, now allowing for easier repairs. The M2.5x14 screws provide more rigid securement to the rest of the train, while also acting as an axle for the bogie to pitch on.
Train IV: Top & Bottom Wireframe Views
Some close up views of the spine and bogie assemblies provide a better idea of how it all fits together.
In theory, the bearings on top of the spines give the axle assemblies a longer sleeve to yaw about, in turn decreasing wobble.
The tie rod end for the zero car axle gives a realistic look and function to the train, but unfortunately its scale prevents it from having a sufficient angle of rotation to maneuver any tight elements or transitions.
Decorative parts of the train such as the seats, restraints, and miscellaneous theming were assembled and attached to the previously constructed spine and bogie assemblies prior to the final assembly.