I should have said that the locomotive could not begin moving from a standstill.
Bob Nicholson ___________________________________ --- In [email protected], "Robert Nicholson" <[EMAIL PROTECTED]> wrote: > > I'm not sure a larger diameter wheel puts that much more surface on > the rail, all things being equal, and not being a mechanical engineer. > I do know this, though; old timers told me that a nickel against the > wheel tread on a locomotive such as 4-8-4 ATSF 2913 was enough to > stall the locomotive which, because of its weight, could not climb > over the nickel. I have no first hand experience, however. > > Bob Nicholson (Duct tape over mouth!) > ____________________________________________- > > --- In [email protected], "ed_loizeaux" <Loizeaux@> wrote: > > > >Suffice to say, that I am still in learning mode > > trying to figure out why a large-wheeled loco (steam) has more drawbar > > pull than a small-wheeled loco (dismal) when they both have the same > > weight and the same number of powered wheels. One fellow suggested > > (offlist) that the larger diameter wheel has more surface area contact > > with the rail head which then results in more drawbar pull. > > Interesting theory, but I cannot say if it is really the causation > > factor in this instance. Any mechanical ungineers out there? Or > > metallurgists? Or maybe someone willing to take an unscientific > > guess? Nothing like a new challenge to end the day. Cheers...Ed L. > > > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
