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A comment on Swiss Post Suspends Drone Delivery Service After Second Crash. Parent comment

Re:Swiss Post Suspends Drone Delivery Service After Second C... by extropy on Tuesday August 06, 2019 @05:32AM (#20623661)
For autorotation you need to passively stay upright and a certain propeller area to weight ratio.

All of which are not present in a typical multirotor.

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Re:Swiss Post Suspends Drone Delivery Service After Second C... by FabHK on Tuesday August 06, 2019 @03:24PM (#20628578)
And you need pitch control ("collective").
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