Jerry: There is no problem with mixing different types of locomotives, or even different gear ratios. Each locomotive will respond to the throttle commands of the controlling unit just as it would to its own throttle. The major concern is traction motor ratings, and the whole consist is limited by the locomotive with the lowest ratings (the weakest link theory)
As far as gear ratios, there may be some slack action when the consist is running light, but under a load, each locomotive settles down and pulls as it is able. Since independent traction motors turn the wheels, on each locomotive they will turn only as fast as the wheels of other locomotives in the consist, barring wheel slip, etc. Bob Nicholson ________________________________________________ --- In [email protected], "mountain4822000" <jgerard@...> wrote: > > Ed Davis, not sure this was discussed. On mixing six axle motors (SD) and 4 > axles (GP), am not an engineer, but I thought the SD engines would drag the > GP units if there were more ratio of SD's vs GP's in the same consist. I > remember seeing one SD unit with several GP units on the West Md in the 70's. > Also heard they are better paired up with sister axle units. You may get > away with the right units being paired up if the terrain, speed and weight > of the train all work together. > Without getting too much off model rr topic, maybe our 2 resident engineers > and one conductor (sorry if I missed anyone) could explain the mix briefly. I > am curious now even if it have to go off line. regards Jerry Smith Arnold, > Md at JGerard5@... > ------------------------------------ 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: [email protected] [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/
