Well, speed step one on my Legacy Genset equates to about 1/2" a second, you have to look twice to see if it's moving at all. I also have many MTH locomotives that are running fine at 3 MPH, but I've never seen one run smoothly at 1 MPH. I just did a test on a first generation Legacy GP-7, it went 10" in 17 seconds on speed step 1, that's roughly 2 scale MPH. That's about what I get from the MTH, but probably close to half of my MTH locomotives won't run smoothly at 2 scale MPH.
I actually don't understand why the MTH has a problem at the lower speeds, from all I see the gear ratios are similar to the Legacy stuff. Since both have positive feedback on the motor RPM, one would think they'd have similar characteristics.
That is what the rivet counters notice, most of our MTH runs best 5mph and above. Then again, the RR isn't making any money at those speeds!
