In the previous update, I did not include the zero car for the model that provides stability for the rest of the train.
The Zero Car presented a challenge in terms of how the car must articulate to match the track, yet only rotate in the necessary dimensions so that it is stable enough for the following cars to support themselves. To do this, It must only be able to rotate on the roll and yaw axes, which my current model did not allow for since there was no connection to the main chassis that would allow for the roll direction.
I solved this by adding a bearing placed vertically within the front of the chassis spine. This allows for the rotation in the roll axis that's needed. Then another part will be mounted to a a bearing that allows yaw rotation. This part will then be have the bogies mounted to the sides in the same way as the axle at the back of the car. This assembly can be seen in the second photo.
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