Artificial flight may be defined as that form of aviation in which a man flies at will in any direction by means of an apparatus attached to his body, the use of which requires personal skill. (Otto Lilienthal)

Artificial flight may be defined as that form of aviation in which a man flies at will in any direction by means of an apparatus attached to his body, the use of which requires personal skill.

Otto Lilienthal

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apparatus aviation body direction flight flies form man personal skill use means

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