In 1919 the Marquis Raul Pateras de Pescara began trials with a series of helicopters leading to his 1924 biplane helicopter which had 16 rotorblades mounted co axially with both cyclic and collective pitch control. He flew it in France rather than his native Argentina, succeeding in directing its flight at a speed around 8 kph (13 mph) and 700 yards, making autorotative descents with the blades free¬wheeling.
The Pescara No.3 was flown backwards in 1924 on second flight. It later flew for 670 seconds.
By 1965 it was in reserve storage at the Musee de L’Air.
All Aero 