Union Pacific's 9000 series steam locomotives were unique in that the 4-12-2 wheel arrangement made them the biggest non-articulated steam locomotives. From the Green Frog show "The Golden Twilight of Postwar Steam, Part 3" https://rfd.video/PostwarSteam3 | Steam Giants

A crazy variety of motive power could be found on Sherman Hill during the late 1950's. From the Pentrex show "Big Boys Cab Forwards Challengers & Daylights - The Hank Griffiths Collection" https://rfd.video/Griffiths | Steam Giants

A Sunday morning pacing of Big Boy 4014. Watch those rods move! From the Pentrex show "Southwest Big Boy" https://rfd.video/SWBB | Steam Giants