steam loco question

[nw-mailing-list at nwhs.org]

The tires and wheels on locomotives, as well as rolling stock, are shaped in such a way that as the wheel enters a curve, the outside wheel raises up on the wheel flange, and the inside wheel lowers closer to the rail head, thus creating a cone effect, with the outside wheel on a slightly larger diameter than the inside wheel.  At least, that's the way a retired railroader explained it to me.  I hope it makes sense.  He drew me a picture to make it more plain.
   
  Ben Blevins

nw-mailing-list at nwhs.org wrote:
  A steam locomotive enters a curve with drivers on both sides eating up the same amount of rail,--why does the drivers on the shorter rail not climb out ??    
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