Luigi Stipa (30 November 1900 – 9 January 1992) was an Italian aeronautical, hydraulic, and civil engineer and aircraft designer who invented the "intubed propeller" for aircraft, a concept that some aviation historians view as the predecessor of the turbofan engine. == Early life and career == Stipa was born in Appignano del Tronto, Italy on 30 November 1900.
Luigi Stipa (30 November 1900 – 9 January 1992) was an Italian aeronautical, hydraulic, and civil engineer and aircraft designer who invented the "intubed propeller" for aircraft, a concept that some aviation historians view as the predecessor of the turbofan engine. == Early life and career == Stipa was born in Appignano del Tronto, Italy on 30 November 1900.
Source: Wikipedia "Luigi Stipa" · CC BY-SA 4.0
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