B
The famous German pilot and designer Richard Dietrich, after a short work in his own company Dietrich Flugzeugwerke AG, moved to the large company MIAG Mühlenbau & Industrie AG. Dietrich began his activities in the new location with the development of the MD.12 light multi-purpose aircraft .

The aircraft was a two-seat two-column biplane, equipped with a 150 hp seven-cylinder radial Siemens-Halske Sh 14 A engine. 

The tests of the aircraft were successful, but serial production did not follow, since MIAG had already signed contracts for licensed production of He. 46 and planned to produce the Ar.66C as well . Therefore, the MD.12 remained only an experimental vehicle, although it nevertheless received a civil registration number D-EDNO .
Type 2-seat sportplane
Engine 1 Siemens-Halske Sh 14 A
Dimensions Length 6,70 m , height 2,65 m ,  span 9,00 m , wing area  12,2 m2 ,
Weights Empty 540 kg, loaded  , max. take off weight 770 kg 
Performance Max.. speed  200 km/h, cruising speed 170 km/h , range 570 km, endurance  , service ceiling 3800 m  , climb
Type Werk.Nr Registration History
D-EDNO