Which rotary-wing aircraft was invented in 1920 by the Spanish aeronautical engineer Juan de la Cierva?
Answer and explanation
Correct answer: B. autogyro
- Step 1: According to the official source: Juan de la Cierva y Codorníu, 1st Count of la Cierva ( [ ˈxwan de la ˈθjeɾβaj koðoɾˈni.u ] ; 21 September 1895 – 9 December 1936), was a Spanish civil engineer, pilot and a self-taught aeronautical engineer. ... His most famous accomplishment was the invention in 1920 of a rotorcraft called Autogiro, a single-rotor type of aircraft that came to be called autogyro in the English language. Answer: autogyro. Why not the others: hovercraft, zeppelin, and glider are other historical aviation transport vessels and aeronautical inventions.
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