2619143 Jacob Degen\'s 1808 ornithopter with flap valves, in which the pilot stood on a rigid frame and worked the wings with a movable horizontal bar, from \'Les Merveilles de la Science\', published c.1870 (litho) by French School, (19th century); Private Collection; (add.info.: His 1809 attempt at flight failed, so he then added a small hydrogen balloon and the combination achieved some success. (Jacob Degan, 1760-1848). ); French, out of copyright.
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Details
Creative#:
TOP27459421
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
Right to Privacy:
No
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