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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. His 1809 attempt at flight failed, so he then added a small hydrogen balloon and the combination achieved some success. (Jacob Degan, 1760-1848). From Les Merveilles de la Science, published c.1870
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TOP20772675
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達志影像
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RM
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HorizontalTransportationAerialScienceTechnologyManInventionSmallHistoryTransportFlyingFrameBarPilotBalloonScientistWingsFlightFlapAttemptScientificBallooningDeviceStoodCenturyRigidAeronauticsSwissAustrianWorkedFailedTechnologicalAeronautical19thHistoricalPoweredNineteenthMovableValvesJacobOrnithopterInventorAerostaticBalloonistAeronauticHydrogenAerostat1808DegenDegen's
180819thAerialAeronauticAeronauticalAeronauticsAerostatAerostaticAttemptAustrianBalloonBallooningBalloonistBarCenturyDegenDegen'sDeviceFailedFlapFlightFlyingFrameHistoricalHistoryHorizontalHydrogenInventionInventorJacobManMovableNineteenthOrnithopterPilotPoweredRigidScienceScientificScientistSmallStoodSwissTechnologicalTechnologyTransportTransportationValvesWingsWorked