Loco Physics, specifically Donner Pass locos

[Kali]

I wish I could remember which values matter for which blueprints - MaxPower does matter for diesel-electric but then it interacts with the graphs oddly, iirc the game works with the lowest value for a given speed-graph/throttle-graph/RPM which will explain a lot of the ammeter wierdness. Ignoring the field divert graph ( and everyone should ignore the built in "field diverts" ), the ammeter is a direct readout of tractive effort, scaled by I think Maxforce as I said ( and probably some max current figure somewhere, it's been a long time ). If you get rid of the graphs completely, the output is literally Maxpower/speed*fraction of max RPM - which sounds good until you realise that at rest that is infinity :p