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!
| 42_inch_wheel.STL |
| 68_inch_tire.STL |
| air_Pump-a.STL |
| air_Pump-b.STL |
| Air_Pump_Shield.STL |
| Axle_2.STL |
| Axle_Bearing.STL |
| Back_Rod.STL |
| Bell.STL |
| Bell_Cradle_.STL |
| Bell_Crib.STL |
| Bell_Nut.STL |
| Big_Boy_Assembly.pdf |
| BIG_BOY_LOCOMOTIVE_1-15th_SCALE.EASM |
| BIG_BOY_LOCOMOTIVE_1-15th_SCALE.STL |
| BIG_BOY_PARTS_LIST.xlsx |
| boiler_Seam_plate.STL |
| Boiler_Section_1_-_SCALED_Part_1-.STL |
| Boiler_Section_1_-_SCALED_Part_2-.STL |
| Boiler_Section_1_-_SCALED_Part_3a-.STL |
| Boiler_Section_1_-_SCALED_Part_3b-.STL |
| Boiler_Section_1_-_SCALED_Part_4a-.STL |
| Boiler_Section_1_-_SCALED_Part_4b-.STL |
| Boiler_Section_1_-_SCALED_Part_5-.STL |
| Boiler_Section_1_-_SCALED_Part_6-.STL |
| Boiler_Section_2_-_SCALED_Part_1.STL |
| Boiler_Section_2_-_SCALED_Part_2.STL |
| Boiler_Section_2_-_SCALED_Part_3.STL |
| Boiler_Section_2_-_SCALED_Part_4.STL |
| Boiler_Section_3-_SCALED_Part_1.STL |
| Boiler_Section_3-_SCALED_Part_2.STL |
| Boiler_Section_3-_SCALED_Part_3.STL |
| Boiler_Section_3-_SCALED_Part_4.STL |
| Boiler_Section_4-_SCALED-1.STL |
| Boiler_Section_4-_SCALED-2.STL |
| Boiler_Section_4-_SCALED-3.STL |
| Boiler_Section_4-_SCALED-4.STL |
| Boiler_Section_4-_SCALED-5.STL |
| Boiler_Section_4-_SCALED-6.STL |
| Boiler_Section_4-_SCALED-7.STL |
| Boiler_Section_4-_SCALED-8.STL |
| Brake_Air_Reservoir__Long-a.STL |
| Brake_Air_Reservoir__Long-b.STL |
| brake_motor_connecting_rod.STL |
| Bumper_Step.STL |
| Cab-1.STL |
| Cab-10.STL |
| Cab-2.STL |
| Cab-3.STL |
| Cab-4.STL |
| Cab-5a.STL |
| Cab-5b.STL |
| Cab-5c.STL |
| Cab-6a.STL |
| Cab-6b.STL |
| Cab-6c.STL |
| Cab-7.STL |
| Cab-8.STL |
| Cab-9.STL |
| Cab_-_Side_Rivets-.STL |
| Cab_-_Side_Rivets-2.STL |
| Cab_Ladder.STL |
| Cab_Support-_SCALED.STL |
| Cab_Support_-_Left-_SCALED.STL |
| COMBINATION_LEVER.STL |
| Combination_Lever_Pin_1.STL |
| Crank_Pin_-_BACK.STL |
| Crank_Pin_-_Back_-_COVER.STL |
| Crank_Pin_-_Back_-_NUT.STL |
| Crank_Pin_-_Front-A.STL |
| Crank_Pin_-_Front-B.STL |
| Crank_Pin_-_Intermediate.STL |
| Crank_Pin_-_Intermediate_-Nut.STL |
| Crank_Pin_-_Main.STL |
| crosshead_-_LEFT.STL |
| Crosshead_-_RIGHT.STL |
| Crosshead_Guild_Lower_Support.STL |
| Crosshead_Guild_Support.STL |
| CrossHead_Pin.STL |
| CrossHead_Pin_-_NUT.STL |
| crosshead_pin_-_small.STL |
| Dome_-_SCALED.STL |
| Drive_Wheel_-_Front_-_Back.STL |
| Drive_Wheel_-_Intermediate.STL |
| Drive_wheel_assembly.STL |
| ECCENTRIC_ROD.STL |
| ECCENTRIC_ROD_COVER.STL |
| Ecentric_Crank.STL |
| Engine_Truck_Axle_-_SCALED.STL |
| Engine_Truck_Axle_Box-SCALED.STL |
| Engine_Truck_Side_Frame.STL |
| Engine_Truck_Spring_Replacement_-_Scaled.STL |
| Engine_Truck_Swing_Frame.STL |
| Engine_Truke_-_36_inch_wheel.STL |
| Front_Engine_-_Part_1.STL |
| Front_Engine_-_Part_2.STL |
| Front_Engine_-_Part_3.STL |
| Front_Engine_-_Part_3a-.STL |
| Front_Engine_-_Part_3b-.STL |
| Front_Engine_-_Part_4.STL |
| Front_Engine_-_Part_4a-.STL |
| Front_Engine_-_Part_4b-.STL |
| Front_Engine_-_Part_5.STL |
| Front_Engine_-_Part_6-arm_1.STL |
| Front_Engine_-_Part_6-arm_2.STL |
| Front_Engine_-_Part_6-arm_3.STL |
| Front_Engine_-_Part_6-arm_4.STL |
| Front_Engine_-_Part_6.STL |
| Front_Engine_-_Part_7.STL |
| Front_Engine_-_Part_8-Arm_1.STL |
| Front_Engine_-_Part_8-Arm_2.STL |
| Front_Engine_-_Part_8.STL |
| Front_Rod.STL |
| Front_Step_Bracket_-_Front.STL |
| Front_Step_Bracket_-_Right.STL |
| Front_Step_Bracket_Seat_Right.STL |
| Front_Step_Plate.STL |
| Guide_-_Front_Engine.STL |
| Guild_Plate-_Back_Engine.STL |
| Handrail.STL |
| Handrail_support.STL |
| Headlight_with_number_plates.STL |
| Imtermediate_Rod.STL |
| Indicator_Lamp.STL |
| Ladder_Brace.STL |
| Lift_arm_pivot_plate_A.STL |
| Lift_arm_pivot_plate_B.STL |
| Link_and_Trunion.STL |
| Link_Block.STL |
| Link_Motion_pivot_pin.STL |
| Link_Support_Frame-A.STL |
| Link_Support_Frame-B.STL |
| Link_Support_Frame.STL |
| Main_Axle.STL |
| Main_Rod.STL |
| MakerBot_-_Rear_Engine-_SCALED-1.STL |
| MakerBot_-_Rear_Engine-_SCALED-10-a.STL |
| MakerBot_-_Rear_Engine-_SCALED-10-b.STL |
| MakerBot_-_Rear_Engine-_SCALED-10-c.STL |
| MakerBot_-_Rear_Engine-_SCALED-11-a.STL |
| MakerBot_-_Rear_Engine-_SCALED-11.STL |
| MakerBot_-_Rear_Engine-_SCALED-12-b.STL |
| MakerBot_-_Rear_Engine-_SCALED-12a-.STL |
| MakerBot_-_Rear_Engine-_SCALED-13.STL |
| MakerBot_-_Rear_Engine-_SCALED-14.STL |
| MakerBot_-_Rear_Engine-_SCALED-19.STL |
| MakerBot_-_Rear_Engine-_SCALED-2.STL |
| MakerBot_-_Rear_Engine-_SCALED-20.STL |
| MakerBot_-_Rear_Engine-_SCALED-3.STL |
| MakerBot_-_Rear_Engine-_SCALED-4.STL |
| MakerBot_-_Rear_Engine-_SCALED-5.STL |
| MakerBot_-_Rear_Engine-_SCALED-6.STL |
| MakerBot_-_Rear_Engine-_SCALED-7.STL |
| MakerBot_-_Rear_Engine-_SCALED-8.STL |
| MakerBot_-_Rear_Engine-_SCALED-9a-.STL |
| MakerBot_-_Rear_Engine-_SCALED-9b-.STL |
| MirrorCab_Ladder.STL |
| MirrorFront_Step_Bracket_-_Right.STL |
| MirrorFront_Step_Bracket_Seat_Right.STL |
| MirrorLadder_Brace.STL |
| MirrorLink_Support_Frame-A.STL |
| MirrorLink_Support_Frame-B.STL |
| MirrorLink_Support_Frame.STL |
| Mirrorpilot_step_1.STL |
| Mirrorpilot_step_2.STL |
| MirrorReverse_Gear_Motor-NO_STAND-OFF.STL |
| MirrorRun_Board_Back-A.STL |
| MirrorRun_Board_Back-B.STL |
| MirrorRun_Board_Back-C.STL |
| MirrorRun_Board_Front-A.STL |
| MirrorRun_Board_Front-B.STL |
| MirrorRun_Board_Front-C.STL |
| MirrorSpring_Set_-_SCALED.STL |
| MirrorSteam_Pipe_-_Back_Engine-A.STL |
| MirrorSteam_Pipe_-_Back_Engine-B.STL |
| MirrorSteam_Pipe_-_Back_Engine-C.STL |
| MirrorSteam_Pipe_-_Back_Engine-D.STL |
| MirrorSteam_Pipe_-_Back_Engine-E.STL |
| MirrorSteam_Pipe_Boiler-a.STL |
| MirrorSteam_Pipe_Boiler-b.STL |
| MirrorTrain_Indicator_Bracket_Left.STL |
| Mirror_air_Pump_a.STL |
| Mirror_air_Pump_b.STL |
| Mirror_Pilot_Railing_-A.STL |
| Mirror_Pilot_Railing_-B.STL |
| mirror_reverse_Shaft_Arm_-_back.STL |
| New_Handrail-A.STL |
| New_Handrail-B.STL |
| New_Handrail-C.STL |
| New_Handrail-D.STL |
| New_Handrail_2.STL |
| Pilot.STL |
| Pilot_Light_Rail.STL |
| Pilot_Railing-a.STL |
| Pilot_Railing-b.STL |
| pilot_step_1.STL |
| pilot_step_2.STL |
| Pipe__T-a.STL |
| Pipe__T-b.STL |
| Piston_Rod-_Rear.STL |
| Piston_Rod.STL |
| Radiator_Core_a.STL |
| Radiator_Core_b.STL |
| Radius_Bar.STL |
| Radius_bar_lifter.STL |
| Radius_bar_lifter_pin.STL |
| Radius_Bar_Pin.STL |
| Radius_Bar_Pin_nut.STL |
| Rail-_Scaled.STL |
| Rail_Bed_Section.STL |
| Rail_Ties-_Scaled.STL |
| Reverse_Bar_Pin.STL |
| Reverse_Gear_Motor-Standoff_Long.STL |
| Reverse_Gear_Motor-Standoff_Short.STL |
| Reverse_Gear_Motor-_NO_STAND-OFF.STL |
| reverse_rod.STL |
| reverse_Shaft_Arm.STL |
| reverse_Shaft_Arm_-_back.STL |
| Reverse_Shaft_Pivot.STL |
| Reverse_Shaft_Pivot_nut.STL |
| Run_Board_Back-A.STL |
| Run_Board_Back-B.STL |
| Run_Board_Back-C.STL |
| Run_Board_Front-A.STL |
| Run_Board_Front-B.STL |
| Run_Board_Front-C.STL |
| Sandbox_3-SCALED-A.STL |
| Sandbox_3-SCALED-B.STL |
| Sandbox_3-SCALED-C.STL |
| Sandbox_Back-_top_SCALED-b.STL |
| Sandbox_Front-Part_1_-_SCALED-A.STL |
| Sandbox_Front-Part_1_-_SCALED-B.STL |
| side_tank.STL |
| Smoke_Box_-_Part_1-.STL |
| Smoke_Box_-_Part_2-.STL |
| Smoke_Box_-_Part_3-.STL |
| Smoke_Box_-_Part_4-.STL |
| Smoke_Box_Front-HALF_a.STL |
| Smoke_Stack_and_Shield-_SCALED.STL |
| Spring_Set_-_SCALED.STL |
| Steam_Pipe-a.STL |
| Steam_Pipe-b.STL |
| Steam_Pipe_-_Back_Engine-a.STL |
| Steam_Pipe_-_Back_Engine-b.STL |
| Steam_Pipe_-_Back_Engine-c.STL |
| Steam_Pipe_-_Back_Engine-d.STL |
| Steam_Pipe_-_Back_Engine-e.STL |
| steam_pipe_bent-a.STL |
| steam_pipe_bent-b.STL |
| Steam_Pipe_Boiler-a.STL |
| Steam_Pipe_Boiler-b.STL |
| Steam_Pipe_Elbow_1-a.STL |
| Steam_Pipe_Elbow_1-b.STL |
| Steam_Pipe_Front_Engine-a.STL |
| Steam_Pipe_Front_Engine-b.STL |
| Steam_Pipe_Left_and_Right-a.STL |
| Steam_Pipe_Left_and_Right-b.STL |
| Steam_Pipe_T_pipe-a.STL |
| Steam_Pipe_T_pipe-b.STL |
| Stoker_Pipe_1.STL |
| Stoker_Pipe_2.STL |
| Stoker_Pipe_3.STL |
| Stoker_Support.STL |
| Sump_Radiator_-A.STL |
| Sump_Radiator_-B.STL |
| sump_tank.STL |
| Trailing_Truck_Axle.STL |
| Trailing_Truck_Axle_Cap.STL |
| Trailing_Truck_Frame-1.STL |
| Trailing_Truck_Frame-2.STL |
| Trailing_Truck_Frame-3.STL |
| Trailing_Truck_Frame-4.STL |
| Train_Indicator_Bracket_Left.STL |
| Trunion.STL |
| Union_Link.STL |
