The Cierva C.4 was an experimental autogiro built by Juan de la Cierva in Spain in 1922 which early the following year became the first autogyro to fly...

The Cierva C.30 is an autogyro designed by Juan de la Cierva and built under licence from the Cierva Autogiro Company by A V Roe & Co Ltd (Avro), Lioré-et-Olivier...

Cierva scholarship from the Spanish Ministry of Science in named after him. Cierva C.1 Cierva C.2 Cierva C.3 Cierva C.4 Cierva C.6 Cierva C.8 Cierva C...

The Cierva C.19 was a 1930s British two-seat autogyro, designed by Spanish engineer Juan de la Cierva. It was built by Avro as the Avro Type 620. It proved...

The Cierva C.6 was the sixth autogyro designed by engineer Juan de la Cierva, and the first one to travel a "major" distance. Cierva, the engineer responsible...

Cierva C.8 is an experimental autogyro built by Juan de la Cierva in England in 1926 in association with Avro. Like Cierva's earlier autogyros, the C...

[citation needed] Cierva C.1 Cierva C.2 Cierva C.3 Cierva C.4 Cierva C.5 Cierva C.6 Cierva C.7 Cierva C.8 Cierva C.9 Cierva C.10 Cierva C.12 (first flight...

business aircraft C-4 Argonaut, a Canadair aircraft derived from the Douglas DC-4 Cierva C.4, a 1922 Spanish experimental autogyro DFW C.IV, a 1916 German...

Havilland C.24 was a two-seat autogyro built by de Havilland at its Stag Lane works in England in 1931 The C.24 was built in 1931 using a Cierva rotor head...

The Cierva C.40 was a British autogyro designed by G.B.L. Ellis, Otto Reder, and Dr. J.A.J Bennett and was assembled by the British Aircraft Manufacturing...

The Cierva C.29 was a five-seat British cabin autogyro built in 1934 as a joint venture between Westland Aircraft and Cierva. The rotor system and rotors...

The Cierva C.12 was an experimental autogyro built by Cierva Autogiro Company in England in 1929, in association with Avro. Like most other Cierva designs...

of all civil aviation in Canada. January 9 or 17 – The Cierva C.4, designed by Juan de la Cierva y Cordoniu and piloted by Alejandro Gomez Spencer, makes...

The Cierva C.1 was an experimental autogyro built by Juan de la Cierva in Spain in 1920, the forerunner of his successful series of autogyros. The C.1 was...

Cierva C.2 was an experimental autogyro built by Juan de la Cierva in Spain in 1921-22. Following the failure of the C.1 the previous year, la Cierva...

The Cierva W.11 Air Horse was a helicopter developed by the Cierva Autogiro Company in the United Kingdom during the mid-1940s. The largest helicopter...

The Cierva C.25 was a British 1930s single-seat autogiro produced by Comper Aircraft Company Ltd of Hooton Park, Cheshire. The sole C.25, based on the...

C.6 Cierva C.8 Cierva C.9 Cierva C.12 Cierva C.17 Cierva C.19 Cierva C.24 Cierva C.29 Cierva C.30A Cierva C.40 Cierva CR Twin Cierva W.5 Cierva W.9 Cierva...

The Cierva C.7 was an experimental autogiro designed by Juan de la Cierva and built in the late 1920s. On January 7, 1927, the Cierva C.6C was flying...

The Cierva C.3 was an experimental autogyro built by Juan de la Cierva in Spain in 1921.[citation needed] It was based on the fuselage of a Sommer monoplane...

The Cierva C.17 was a British experimental autogyro built by Cierva Autogiro Company in England in 1928, in association with Avro (which designated it...

The Cierva C.9 was an experimental autogyro built by Cierva in England in 1927, in association with Avro. It was the first of Cierva's autogyro designs...

demonstrator Zveno project – Parasite fighters Cierva C.4 1923 – Experimental autogyro, first to fly Cierva C.6 1924 – Experimental autogyro Saab 201 - Aerodynamic...

Spencer made the first successful Autogyro flight in the Cierva C.4 on January 9, 1923 (O.C.), previous designs having failed to achieve flight. First...

propeller. The term Autogiro became trademarked by the Cierva Autogiro Company. De la Cierva's Autogiro is considered the predecessor of the modern helicopter...

January 17 (or 9) – First flight of the first rotorcraft, Juan de la Cierva's Cierva C.4 autogyro, in Spain. (It is first demonstrated to the military on...

Alexander Graham Bell. 1923 - First controlled autogyro rotorcraft flight in Cierva C.4. 1924 - The world's first functional diesel locomotive (diesel-electric...

first practical helicopter, first flown in 1936. Focke-Wulf Fw C.30A - licence-built Cierva C.30A (general purpose autogyro) Nagler-Rolz NR 54 (one-man portable...

(or 9) – First stable flight of the first rotorcraft, Juan de la Cierva's Cierva C.4 autogyro, in Spain. June – Hermann Oberth publishes Die Rakete zu...

which reduces stresses on the rotor driving mechanisms.: 1–112  P-factor Cierva C.4 Unequal rotor lift distribution "2. Aerodynamics of Flight". Helicopter...