[1] The helicopter first flew on 8 July 1958 in Bremen, piloted by Ewald Rohlfs.

[2] Two prototypes were built; they had steel tubing fuselages, covered with metal and fabric and v-tails with tail rotors at their tips.

The plywood covered main rotors had three blades with steel tubing spars.

The helicopter had a six-cylinder air-cooled Lycoming VO-435-A1B engine, producing 260 hp.

[4] Data from Jane's All the World's Aircraft 1960-61[5]General characteristics Performance