146K views · 7.4K reactions | Pennsylvania Railroad's unique and somewhat odd 4-4-4-4 T1 locomotives were some of the most advanced steam locomotives, but the chance to improve some flaws and make them even better was pointless. The diesels were coming soon. From the Green Frog Productions show "Golden Twilight of Postwar Steam, Part 1" https://rfd.video/PostwarSteam1 | Steam Giants | Facebook

114K views · 4.9K reactions | One of the 25 Big Boy locomotives (besides the modern version of 4014) was briefly converted to burn oil. The 4005 is seen, likely after being switched back to burn coal at Green River, Wyoming in this nice scene from the Pentrex show "Union Pacific Classic Collectors’ Combo" https://rfd.video/UPCollector | Steam Giants | Facebook