I know little about Flyer, except for seeing it in stores as a kid, and neighbor kids
had Atlantic sets, but as in the case of a Marx engine on another thread, that second
picture shows me a four wheel rear truck on the near loco in the second picture,
That means the loco is a Hudson. No sets came with that many cars, so...add-ons,
or combined sets. If you had only one engine, I'd say the base was a Hudson freight
set. In the fourth view, the engine is far away, and looks smaller, maybe an Atlantic,
but that just might be the photo....