Juan de la Cierva
Juan de la Cierva was a Spanish civil and aeronautical engineer. He had tinkered with autogiros by 1912. Jewkes, Sawers, and Stillerman, 1969 say that he became one of the most influential early engineers/designers of helicopters.
Cierva had some rather good 3-motor airplane design in 1914 that the Spanish govt adopted for a war air craft design ?! (He was born in 1895, and that seems too young for him to have affected WWI. However this is what the sources in enwp say.)
|Names||Juan de la Cierva; Juan de la Ciera y Codorníu; 1st Count of la Ciera|
|Occupations||civil engineer, aeronautical engineer|
|Affiliations||Cierva Autogiro Company|