Avidrone's Katana helicopter drone secured the top spot in the DARPA Lift Challenge, even though it crashed during a test run while hauling a 51 kg (112.4 pounds) load. The 13-kg aircraft managed an impressive 3.84 to 1 payload-to-weight ratio during the event in Ohio. The competition required participants to lift off with cargo, navigate a flight path, release the payload, and finish the course while flying empty.

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