steam loco question

nw-mailing-list at nwhs.org nw-mailing-list at nwhs.org
Mon Jun 26 14:13:20 EDT 2006


In a nutshell, the tyres on the wheels are slightly coned - increasing in
size towards the flange. Thus, as the loco moves to the outside of a curve
the outside wheel is riding on a slightly larger diameter part of its tyre -
and the inside one is on the smaller diameter on the outside of its tyre.

I'm sure that there's a more technical explanation than that, but that's it
really!

Very best wishes,
Peter Prydderch Stockport UK




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