"Annular Wing Unmanned Air Vehicle"
The vehicle has only 2 parts the ring wing and the motor-propeller no other moving parts for a gain in weight. AWuAV is controlled only by a Thrust Vectoring Flight Control (TVFC)
A shrouded ducted annular wing can be smaller and carry more payload than a bi or quadcopter.
To reduces the weight and power consumption of the unit. The electric motor-propeller is fixed on a ring gimbal mechanism with 2 servos at 90 degrees. (no control surface). This technological leap makes it possible to manufacture drones of 0.30 meters to 1.5 meters of diameter which can carry 2 times their weight from 2 kg to 150 kg of payload and about 40 minutes to 10 hours in air. Up to 0.60 meters in diameter, the electric motor with or not a hybrid fuel range extender is essential, above we use a twin gaz engine from 7 hp to 160 hp multi-fuel. The idea of making a drone vtol of 25/40cm with a single motor + propeller to start 2 years ago there were 2 possibilities
SingleCopter Has a single motor and 4 independent flaps. The vehicle's yaw is controlled by adjusting all four fine to point slightly clockwise or counter-clockwise.
CoaxCopter Has two counter-rotating motors and at least two independent flaps (4 individual servos / flaps can be used. The vehicle's yaw is controlled by adjusting the speeds of the two motors. I.e. speeding up the clockwise motor while slowing down the counter-clockwise We tested the singlecopter solution but having the load above the drone did not please us. The project leader had the idea to use a mobile motor + helice assembly to direct the drone.
- axe + ball and 2 servos at 90 ° (takes too much place in height)
- 2 square chassis and 2 servos at 90 ° (not solid enough, takes too much place)
- 2 pieces with hinge and pivot at 90 ° (takes too much place in height)
MORE on http://awuav.world/how-it-work/