Does the car swivel to reverse direction?
Looks like there is something between the wood frame of the rail car and the wood frame of the A, towards the middle of the car
Looks like both A rear wheels have chains going to the gears on the rail car wheels. Also the other wheel shown without chain also has a geared wheel.
Remove chains, swivel the car around, chains back on, go the other way.
Joe KThe first photo may be Howard T Powers demonstrating his “Automobile Boat” near Corpus Christi, for which he and fellow Corpus Christ inventor Walter C Lewis received patent 1804262 on May 5, 1931. Apparently depression conditions sank any chance of commercial development for Powers.
Looks like the "Train Car" was a slow moving affair. The speed reduction in the chain drive looks like somewhere between 3:1 - 4:1 . However, anything over 25 mph looks like it might be a bad idea. No brakes either.