Can someone help me? Trains operate on tractive effort, steel-on-steel; sand helps on wet/slippery rail - I understand that. I know that steel wheels keep this truck on the track, but I believe the regular tires do the pulling? isn't this rubber tires on (comparably) thin, wet, snowy steel rails? To me, physics says, "slip, slid, spin and go no place" and pulling a loaded freight car to boot!?
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Rubber on steel has a higher coefficient of friction than steel on steel, hence more traction than a steel-wheeled vehicle of the same weight.
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Sorry if this is a late comment, but what does this truck do, and what are siding blowers?
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