I have a Hornby LMS Royal Scot pre-war 20 volt electric engine. It barely moved when I got it. I tore down the motor and cleaned and lubed it and fiddled with the gears and rod alignments and I got it running, but not great. My basic question is how should I expect an engine like this to perform. I used a Z-4000 with the throttle all the way up. The meters read 21 volts at 2.4 amps (no headlight bulb). It would pull six Hornby 4-wheel Coaches at a moderate speed, but occasionally needed a push to start. It wont go as fast as a typical Lionel engine. Hook up MTH LMS cars and it cannot budge them. It has much less power than a typical Lionel small post-war engine.
I'm maxed out on the transformer, yet it has the feel that the engine could go better if it had more voltage. I looked up some old Hornby transformers and they say they are 20 volts at 1 amp. Is that really what they put out or could they go higher? I imagine that I have worn gears, shafts, etc. that limit its performance. Would this have had more speed or performance at 21 volts when it was new?
Would more voltage help or is it likely that worn mechanical components are holding it back? Or am I missing a factor? Its still very usable and will pull a traditional Hornby consist at a fair speed. I wonder if there is anything more I could do to improve it.