The Dornier Do 231 was a 1970s VTOL transport aircraft project developed by Dornier. == Design and development == The Do 231 was a result of a design competition conducted in the early 1970s by the German Federal Ministry of Economics to create a 100-person VTOL transport aircraft.
The Dornier Do 231 was a 1970s VTOL transport aircraft project developed by Dornier. == Design and development == The Do 231 was a result of a design competition conducted in the early 1970s by the German Federal Ministry of Economics to create a 100-person VTOL transport aircraft.
Source: Wikipedia "Dornier Do 231" · CC BY-SA 4.0
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