The Dornier company with their Do 27 STOL aircraft found a aviation niche to raise for their WW2 ashes. The Do 29 was developed in cooperation with the Deutsche Versuchsanstalt für Luftfahrt (DFL) at the end of the 1950s to test extreme short take-off and landing techniques. Based on the wartime Focke-Achgelis Fa 269 project, the Do-29 employed Do 27 airframe equipped with an ejection seat and a pair of Lycoming engines (coupled for safety measures) whose propellers could be tilted downwards 90º. Two prototypes were built, the first took the skies in Dec. 1958. Their test program proved to be fruitful, even if the propellers’ angle never surpassed 60º in operation. Curiously, despite the success of this STOL formula, Dornier went no further.
It was neat and conveniently cheap testbed. Stingily cool.