Stemming from a design competition initiated in 1956, for a vertical take off interceptor,
the He.231 was one of a number of design concepts utilizing the same designation,
ultimately leading to the EWR Sud VJ.101 prototype.
Armament... 1x 25mm Oerlikon cannon, 2x Sidewinder missiles
Reference: "Flieger Revue" magazine, September 1981/343