Op 27-9-2022 om 19:24 schreef Bald Eagle:
> "jr" <cre### [at] gmailcom> wrote:
> 
>> from the mannequin's POV, along the top-outside-corner of each rail, that is,
>> I'd expect most wear on the inner "edges" due to the wheel shape.
> 
> It's an interesting thing, those train wheels:
> 
> https://www.youtube.com/watch?v=y7h4OtFDnYE
> 

Oooh! LOL! indeed. That was a smart explanation by Richard Feynman. 
Thanks for this!

-- 
Thomas

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