The newly unveiled Abraham Lincoln commemorative locomotive No. 1616 and Cheyenne's Big Boy No. 4014 will meet up twice this ...

Big Boy 4014, the world’s largest operating steam locomotive, will make two whistle-stops in Greeley, Colo., this summer as ...

A nine-page Railway Age article of Oct. 4, 1941 (download below) describes the Big Boy in full technical detail. Also for download: elevation and cross-section technical drawings.