The German light aircraft manufacturer Bölkow's technical director Dr Hermann Mylius, together with two other engineers from the company, designed the two-seat MHK-101 in their spare time, with the design being adopted by Bölkow as the Bo 209, entering production in 1970.

[7] The My 102 is a low-wing cantilever monoplane of all-metal construction, powered by a 200 hp (150 kW) Lycoming AIO-360-B1B flat-four piston engine driving a three-bladed propeller.

[8] Work began on construction of a prototype in December 1971, and it first flew, with the registration D-EMYS, on 7 July 1973 at Neubiberg.

[10] Two derivatives of the My 102 were noted as being under development in the 1980 Jane's All the World's Aircraft, the two-seat My 103 Mistral (eventually to fly in 1998[11][12]) and the four-seat My 104 Passat.

[3] The Tornado (now styled MY-102) was being proposed for production by Mylius Flugzeugwerk of Bitburg in 1999, and was claimed to conform to European Joint Aviation Authorities airworthiness standards.