This is something I wasn't aware of: "Naval Ordnancemen receiving training on Aircraft Arming Replicas manufactured by Ballard Aircraft Company, Inc. These training planes have been 'extremely valuable in teaching aviation ordnancemen the best procedure for arming and servicing carrier-based combat Naval airplanes', says a Rear Admiral who is a high official of the Navy Bureau of Aeronautics." at Arthurdale, West Virginia.