"All flight is based upon producing air pressure, all flight energy consists in overcoming air pressure."
— Otto Lilienthal

January 1, 1970

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InventorsAviatorsAerospace engineersPeople from GermanyEngineers from Germany
Original Language: English

Sources

Der Vogelflug als Grundlage der Fliegekunst (1889); English edition: Birdflight As The Basis of Aviation (1911)