This image shows three mechanized conveyor lines at the Lockheed Aircraft Corporation that more than doubled the daily output of the old assembly line. The P-38 Lightning fighters would come down the line at the right then got shunted over to the middle line where they then received their wings and engines. They then would move back to the far end of the huge final assembly hangar,out the door and into a nearby paint hangar where they were painted in camouflage.