Production. Airplane maufacture, general. Scrap lengths of aluminum tubing at the Long Beach, California, plant of Douglas Aircraft Company are returned to the smelters for reclamation and reforming into useful shapes. Most important of the many types of aircraft made at this plant are the B-17F ("Flying Fortress") heavy bomber, the A-20 ("Havoc") assault bomber and the C-47 heavy transport plane for the carrying of troops and cargo