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Re: OK -- a non-Volvo brainteaser.... 700 91

posted by  someone claiming to be wbain on  Sun Dec 2 06:50 CST 2001 [RELATED]

Mostly right. The flanges keep the railroad car wheelset or truck, on the rails during the side to side motion which happens all too frequently. A ringing condition also can occur which would manifest itself in a continuous side to side motion. The flange prevents the wheel fron climbing over the railhead causing derailments. To prevent rail wear on curves, oilers are used to add grease to the rail. This does not go on the railhead but on the side of the rail and on the flange. Nothing is perfect though. Wheelsets are turned on a lathe to true them up, so to speak. The wheel is bell shaped so an audible ring does occur, Horseshoe Curve on the old Pennsy mail like west of Altoona PA. is a prime examble, and it can be really LOUD!!!

NMRA RP-25 dictates the shape of model RR wheels. See NMRA RP-25 for a visual indication.

Nuff said...





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