In 1928 in Italy, Corradino D'Ascanio built a helicopter with two 13m counter-rotating coaxial rotors, each with a trailing elevator which could be used to vary the rotor blade angle of attack. Two small propellers at the ends of extra arms were used for additional control. Powered by a 95hp Fiat engine, the craft set three Federation Aeronautique Internationale (FAI) world records on October 8, 1930: an altitude of 18m, a distance of 1078m, and endurance of 8 minutes and 45 seconds.
D'Ascanio worked for the Piaggio company, and designed also the Vespa scooter.
Engine: 1 x Fiat A-505, 95-100hp
Rotor diameter: 13-15m
Take-off weight: 800kg
Achieved height: 18m
Achieved endurance: 8min 45s