This is a HUGE model of the 4-8-8-4 Big Boy, an American steam locomotive used by Union Pacific Railroad from 1941 into the 1960s. A special project commissioned by MakerBot to test limits of 3D printing, it was created and assembled by Paul Fischer.
Fischer spent between 700 and 800 hours drafting and another 1,000 hours 3D printing the locomotive on a MakerBot Replicator 2 Desktop 3D Printer. The finished engine is six feet long.
Not a project for the faint of heart or short of time!
Follow the "'Big Boy' Assembly' instructions in the PDF under the Files section.
Sanding to fit pieces together will be required. The amount of sanding will depend on how many shells you use in MakerWare. Parts were designed without tolerances. Sanding to fit will be required.
Pieces will likely need to be replated in MakerWare before printing.