The Big Boy, used coal so fast that shovels couldn't feed it fast enough, so they built a conveyor belt direct from the coal to the firebox

photos from http://www.jalopyjournal.com/forum/showthread.php?t=428585&page=927
Source URL: https://ashesgarrett.blogspot.com/2010/12/big-boy-used-coal-so-fast-that-shovels.html
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