drones at best last 45 minutes in the air. too much energy waste on uplift drag.
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20 hr! Wow! The father of US aviation was a Chinese. Wong Tsoo was the architect
-- chaingun
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chaingun
11/29/2022, 22:11:14
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If an ornithopter can fly like a bird,it could remain airborne on upswelling air
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ChairmanMaoHamet
11-30 00:28
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