Dick Balaska <dic### [at] buckosoftcom> wrote:
> On 10/11/19 1:16 PM, Cousin Ricky wrote:

> > I have a question about that locomotive: how does it navigate curved tracks with
> > 3-axle carriages?


Also submitted for your enjoyment:
https://www.youtube.com/watch?v=y7h4OtFDnYE

There's also a similar, somewhat counter-intuitive principle that takes place
with belt-driven devices, making it necessary for those wheels to be convex,
rather than concave like a pulley.

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