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NMRA HO wheel profile and how it relates to friction?
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[quote]QUOTE: <i>Originally posted by DeSchane</i> <br /><br />We been doing a little thinking here, dimastep!?! The subject is interesting to consider, but, likely has "little to do with the price of tea in China". I think the RP-25 standard has more to do with keeping equipment on the rails and passing through switch points, frogs and guard rails then compensating for the difference in speed between the inner and outer wheels. However, never having read RP-25 I am likely talking out the side of my neck! I know the rail head on my Atlas code 100 track is flat. So, no matter what the wheel's contour is, the wheel is riding on a pointed edge and not a rounded edge like the prototype. My un-educated, but, seemingly common sense opinion is the models would have more friction in turns then the prototype, proportionately! We're out in theory land here, which is very close to La La Land <br />[/quote] <br /> <br />You see, I like to run long trains, and they are loaded. So I've been trying to reduce friction as much as possible. After moving to IM wheels and KD trucks I have pretty much reduced friction in the axle, but noticed I am still not getting good results. Which got me thinking... <br />Look at it this way - the rail wear on model trains is nonexistant. So goes for wheel wear. So if you think about it, if the rails and wheels were made prototypical so that (as described above in my first post) there is no friction on the curve - we'd get one step closer to realism. That and also reduced the number of locos required to pull a train.
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