Many British and Commonwealth air routes were established by airlines using de Havilland’s 6-passenger seat, twin-engine biplane, the DH84 Dragon. The Dragon’s first flight (November 1932) pre-dated the better-known DH89 Dragon Rapide (or Dominie in military service) by two years, although...
For taking-off, an insect jumps up or simply pushes away from the support, on which it is perched, its wings being involved into the work and the flight starts. As early as in 1932, Fraenkel studied flying movements in suspended insects and showed launching of the flight in these animals...