Productie van een Boeing 'B-29 Superfortress'. U.S. superfortress wings completed on assembly lines.

Productie van een Boeing 'B-29 Superfortress'. U.S. superfortress wings completed on assembly lines. Twin assembly lines are used in building wings for B-29 Superfortresses at a Boeing Aircraft Company plant in the northwestern U.S. state of Washington. The wings progress from the front to the rear of the huge factory on a schedule basis. They are moved along the assembly lines by means of cable pulled by an electric winch. When the wings enter the factory's doors, they are bare structures, turned out at another of the company's plants in a different section of the same state. After passing the 19 stations on the assembly line, the wings are complete and ready for attachment to a fuselage section in an adjacent part of the plant. Installed in or on the wings during the trip through then line are fuel cells, fuel valves, booster pumps, harness assemblies, nacelles, engines, propellors, landing gear, cowl flaps and other equipment.