Invented by German-born aircraft designer Edgar Schmued and greenlit by the U.S. Army Air Forces’ General Hap Arnold in 1943, the Twin Mustang is unique: It mates two North American P-51 ...

In some cases these “defective” P-51 parts ended up being intended for the Twin Mustang project, and would get added to the collection of parts that would eventually go into the XP-82 restoration.