Most of us know this, but the 4-6-6-4 "Challenger" type locomotive made famous by the UP 3985 is not exclusive to the Union Pacific. In fact the Northern Pacific had 47 of them, designated as Z6s, Z7s & Z8s built by ALCO between 1936 and 1944. From the Green Frog Productions show "Steam on the Northern Pacific" https://rfd.video/SteamNP | Steam Giants

Pennsylvania Railroads K4 4-6-2 "Pacific" locomotives were the chosen power of their many passenger trains. From the A&R Productions show "The Pennsy & More!" https://rfd.video/PennsyMore | Steam Giants

The numerous 4-6-2 K4 class "Pacifics" of the Pennsylvania Railroad and more on the New York & Long Branch line between Bay Head and South Amboy, NJ. in the Railroad Video Productions show "Pennsylvania Power, Volume 10" https://rfd.video/PRRPower10 | Steam Giants

A look at the very impressive Class "AC-12" 4-8-8-2 Cab forward locomotives from the Southern Pacific. From the Pentrex show "Big Boys Cab Forwards Challengers & Daylights - The Hank Griffiths Collection" https://rfd.video/Griffiths | Steam Giants

NEW! 1950's...1960's style scale model plans to download and make https://www.modelbuildings.org | Model Trains and Railroad Ideas