The other "Big Boy" of the rails, the Yellowstones

The Big Boy, the famous rail monsters built by Union Pacific to meet growing freight demand of the war years. These beasts of the plains have achieved a near mythical standing with the public with the famous 4014 restored and returned to the rails, drawing crowds everywhere it travels. However the Union Pacific Big Boys were not the only massive US Steam engines built on such a scale. Here we see an American Sherman tank that is dwarfed by the colossal DM&IR 2-8-8-4 "Yellowstone" steam locomotive built by the famous Baldwin Locomotive Works. 18 of these giant locomotives were built between 1941 and 1943 they were as much as 513 tons with their tenders, producing up to 6250 hp just slightly less then the Big Boy's 7000.  These powerful engines served well during the war, but technology advances of the 1950s caught up with them. Phased out of service between 1958-1963, three of the 18 locomotives built survive in preservation, though none are currently restored to operating status unlike UP 4014. Those engines are 225, 227, and 229 each on public display in Minnesota.