High Quality Content by WIKIPEDIA articles! The de Havilland DH.114 Heron was a small, propeller-driven British airliner that first flew on 10 May 1950. It was a development of the twin-engine de Havilland Dove, with a stretched fuselage and two more engines. It was designed as a rugged, conventional low-wing monoplane with tricycle undercarriage that could be utilised on regional and commuter routes. One hundred and fifty were built, exported to around 30 countries. Herons later formed the bas ...