In 1938 Dipl. Ing. Simon started the P.1003 project. This design was to be powered with the DB.600 engine which powered two 4m diameter propellers. Both propellers were tilted from vertical to horizontal position to provide both vertical and horizontal movement
Type Two seat VTOL
Engine 1 Daimler-Benz DB 600 driving 2 propellers Ø 4.0 m
Dimensions Length 8.3 m, height 3.1 m,  span 11.0 m, wheelbase 2.0 m
Weights Empty , loaded 2000 kg , max. take off weight  
Performance Max.. speed  650 km/h, cruising speed  , range , endurance  , service ceiling   , climb