I just saw this interesting car and was wondering what it was for. i didnt know if this was the proper place for this... but its a UP car so i guessed here would be good it looks like it would haul something heavy because it has 4 trucks. thanks
They're for hauling Space Shuttle solid rocket booster assemblies for NASA, from builder ATK Thiokol in Utah. IIRC, Overland did some models of them in brass a few years back.
Oh, so THATS'S what they look like. I've long wondered about what SRB segements rode in. Thanks for the pic.