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DARPA Pays Half As A Conventional Helicopter Wins The Lift Challenge At 3.84:1 — DroneXL

Avidrone Inc. won the DARPA Lift Challenge at a 3.84:1 payload-to-weight ratio with the Katana, a conventional single-rotor helicopter, and because nobody reached 4:1, the half-prize clause DroneXL reported last week cu…

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