“All flight is based upon producing air pressure, all flight energy consists in overcoming air pressure.”

— Otto Lilienthal

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

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Otto Lilienthal 16

German aviation pioneer 1848–1896

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“All flight is based upon producing air pressure, all flight energy consists in overcoming air pressure.”

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