drones at best last 45 minutes in the air. too much energy waste on uplift drag. Replying to: 20 hr! Wow! The father of US aviation was a Chinese. Wong Tsoo was the architect -- chaingun Post ReplyForum chaingun 11/29/2022, 22:11:14 Author Profile | Edit Recommend | Alert | 5 4 3 2 1 0 -1 -2 -3 -4 -5 Where am IGo Up Go TopPost ReplyBack

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