Dunne D.VII

Dunne built a monoplane, the D.7, which was displayed at the 1911 Olympia Aero Show in London, and began making deliberate attempts to upset the machine's equilibrium in flight by letting go of the controls during steep, low-level turns. Even the most forgiving aircraft will bite when sorely tried, and sure enough Dunne suffered four major crashes for his fool-hardiness.