Production. A-31 ("Vengeance") dive bombers. Rear monocoque assembly. These huge vertical jigs are used at the Nashville Division of Vultee Aircraft Inc. for assembling the rear monocoque of the Vultee "Vengeance" dive bombers. A short stairway makes it possible for workers to reach easily all parts of the monocoque sections. The "Vengeance" (A-31) was originally designed for the French. It was later adopted by the RAF (Royal Air Force) and still later by the U.S. Army Air Forces. It is a single-engine, low-wing plane, carrying a crew of two men and having six machine guns of varying calibers