Basically what I meant was the in my possession, all original parts MPC era O-27 engines were designed for their top speed to be reached at 14 volts, O-gauge or what I have lionchief reaches its top speed when at 18 volts. As for starting voltage, the O-27 starts at about 5 volts while the Lionchief, not plus, starts at about 12 volts, O-27 MPC is already near top speed at that voltage, and at 18 volts went air born, from the transformer dial readout.
In summery the O-27 engines I used need less voltage for a given speed, making it unsafe to run them together on the same power district.
I hope that clears up what I said. Admittedly I am using the more toy like and less advanced engines that I don't see much of here on the forum and trying to explain their oddities is easier in video than words at times.
