Mallets VS Simple Articulated VS Duplex

Hello Everyone. Today we talk about the differences between these 3 kinds of large locomotives. I decided to make this because History In The Dark (   / @historyinthedark  ) made a few mistakes in some of his videos about the differences of these locomotives. Hope you enjoy! Credits for Footage:    • T1 Video Memories of Pennsy Steam      • DM&IR Yellowstones Giants of Steam Preview      • Видео      • Union Pacific 3985      • Black Hills Central Railroad Steam Train      • Daylight 4449 Steams to Bend, Oregon 24 Ju...      • Western Maryland 1309 - The Beast Is Back      • Big Boy 4014 Steam Train: Return To Steam!