Can we make a quad-copter with a ducted fan and make it perform basic functions? What is good for a quad-copter, ducted or just normal propellers? Why? - Quora
Ducted Fans —
Drones | Free Full-Text | Effect of Ducted Multi-Propeller Configuration on Aerodynamic Performance in Quadrotor Drone
Effect of Ducted Multi-Propeller Configuration on Aerodynamic Performance in Quadrotor Drone
Drones | Free Full-Text | Effect of Ducted Multi-Propeller Configuration on Aerodynamic Performance in Quadrotor Drone