CoaX Helicopters - Coaxial Rotor Helicopters and Large Drones
S O V A on Twitter: "Russian Helicopters @ #MAKS2017 presents coaxial rotors #UAV VRT-300.Max.endurance:5h; Max.T-off W:300 kg; Max.speed:180 km / h;Range:150 km https://t.co/BNg1yww7Iv" / Twitter
Dron de hélice coaxial
Ascent's Coaxial Drones and Exyn's Mapping - DRONELIFE
CoaX Helicopters - Coaxial Rotor Helicopters and Large Drones
Birotor Coaxial High Capacity Helicopter - rpahelicopters
OnyxStar® XENA PX - Foldable drone with 8 rotors coax. : Drones, UAV, OnyxStar, MikroKopter, ArduCopter, RPAS : AltiGator, drones, radio controlled aircrafts: aerial survey, inspection, video & photography