Quadrotor Safety System Stops Propellers Before You Lose a Finger

With spinning hoops to detect obstacles combined with electromagnetic braking, this quadrotor safety system is both effective and cheap

Photo: Evan Ackerman/IEEE Spectrum

Quadrotors have a reputation for being both fun and expensive, but it’s not usually obvious how dangerous they can be. While it’s pretty clear from the get-go th…
IEEE Spectrum Robotics

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