Was the Southern articulated hopper car (with the disc-brake single axles) in aluminum? I believe all the Big Johns were…
UP had IIRC some hoppers articulated in the middle over a single truck.
Then there is that analogue of Iron Highway, the BN TroughTrain… which didn’t even work in steel, but did that stop 'em from implementing them in Wonder Metal???
I sure know a railroad with a whole lot of stainless cabooses!
That ACL car is a real worthy successor to a battleship gon! The only problem is that, after looking carefully at the car details, I find I’m suddenly hungry for something from Burger King…
Ed’s going to have his usual splendid documentation of the car… it’s a covered hopper, btw… but here’s some contemporary, if perhaps a little blurry, description: