 A fuselage structure, tail boom, auxiliary rotor and tricycle undercarriage were designed by Tadeusz Chyliński.A power unit and final drive were designed by Zbigniew Brzoska.The design utilized some components left by the Germans, like a piston engine Hirth HM 504 (re-configured for vertical use), rear gear from a Zündapp motorcycle and wheels from a DFS Kranich glider's jettisonable landing gear.