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A military helicopter drone that can fight wildfires | Fox News
Detect and Avoid Technology Integrated into Tandem-Rotor Helicopter Drone | Unmanned Systems Technology
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The dual rotor helicopter
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SwissDrones Enters APAC Market with a manned helicopter replacement system – sUAS News – The Business of Drones
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XAG V40 V-shape Dual-rotor Agricultural Drone - Just Released ! - YouTube
This Crazy Tandem Rotor Drone May One Day Rescue U.S. Army Casualties
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Bizarre “bicopter” drone uses two tilting rotors for 50-minute flights
This Helicopter Drone Looks Like Something Robots Would Use to Take Over the World - autoevolution
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Zero Zero Robotics V-Coptr Falcon Bi-Rotor Drone F00000001 B&H
bicopter - Explore | Facebook
