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It would be nice to see some more effort put into noise. The tradeoff is shorter flight time, so I imagine that's why they're all loud.

Drones with 8 or 12 bladed props can be surprisingly quiet, with essentially no whine at all.



Ive been wondering if balloon based or gliding drones would be gliding. So trade off some control for much longer flight times


>It would be nice to see some more effort put into noise. The tradeoff is shorter flight time, so I imagine that's why they're all loud.

This is not necessarily true - the noise is a waste of joules, after all.


Very little though, the energy needed to make the noise is incredibly tiny compared to the energy used to fly.




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