[Rick TYler]

Originally Posted by Stephen.Yanczura

That yields a free speed of 4446.87 RPM. Okay so what, right? The CIM motor free wheels at 5310 RPM; that’s over an 800 RPM difference from the FP/AM. Clearly you cannot just say replace one of the CIMs in the KOP transmission with a FP/AM combo and have it work.

Sure you can -- I think. There is no absolute reason they have to both have the same free speed. Through much of the match both motors will be running outside their most efficient range anyways. As I understand the wonderful world of DC motors, the free speed differential won't make any difference, as long as you arent' trying to make that FP motor run past its maximum free speed (something you can insure in software). You could even argue that with two motors of slightly different torque characteristics on each transmission that you might get an aggregate torque curve that is better over a wider range of speeds.

I encourage someone who actually knows what they are talking about to correct me if I'm wrong (which is entirely likely -- I'm really more of a software and program management kind of mentor).