I’m modeling New England in the 50s. Was it ever prototype practice to mix, for instance, a Bangor & Aroostook F7A unit w/ a Maine Central F7 B? I know there was a lot of crossover trackage use, and passenger cars of different roads were often found on the same train, but to what degree was other equipment shared/ leased? Cheers! John
I admit right up front that I don’t know about those two RRs and their power usage. Some of the BAR engines were really owned by the PRR and reverted to the PRR when not needed by the BAR. I also know that when mismatched F units were run together that the older unit had to lead. Something about the smaller traction motor output and overloads as I recall if the newer unit lead since it wouldn’t go in the red as soon on the amps.
Probably very little in the 1950’s. Power sharing wasn’t as common then.