"Bald Eagle" <cre### [at] netscapenet> wrote:
> 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.

Another enjoying movie:
https://www.youtube.com/watch?v=vkzgcJGdUnA

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