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The Antoinette IV was an early French monoplane. It was a high-wing aircraft with a fuselage of extremely narrow triangular cross-section and a cruciform tail. Power was provided by a V8 engine of Léon Levavasseur's own design driving a paddle-bladed tractor propeller. Lateral control was at first effected with large triangular, and shortly afterwards trapezoidal-planform ailerons hinged to the trailing edge of the wings, although wing-warping was substituted at an early stage in flight trials, and in this type proved more effective.
On 19 February 1909, the Antoinette IV flew 5 km (3.1 mi) at Mourmelon-le-Grand, and on 19 July, Hubert Latham attempted to cross the English Channel in it, covering 11 km (6.8 mi) out of Sangatte before making a forced water landing due to engine failure.
General characteristicsCrew: one, pilot
Length: 11.50 m (37 ft 9 in)
Wingspan: 12.80 m (42 ft 0 in)
Wing area: 50 m2 (538 ft2)
Empty weight: 250 kg (550 lb)
Powerplant: 1 × Antoinette 8V, 37 kW (50 hp)
Antoinette IV Wikipedia