Drone Propellers
Propellers are devices that convert rotational motion into linear thrust. Drone propellers provide lift to the aircraft by creating and rotating an airflow that causes a pressure difference between the upper and lower surfaces of the propeller. This accelerates an air mass in one direction, providing lift that opposes the force of gravity.
Propellers for multi-engine drones such as hexacopter, octocopter and quadcopter propellers are arranged in pairs that rotate clockwise or counterclockwise to create a balance. Changing the speed of these propellers will affect the drone's yaw, elevation, descent or yaw, pitch, and roll.
Propeller speeds are varied by changing the voltage supplied to the motor of the propeller, a process managed by an Electronic Speed Controller (ESC). The correct signal is fed to the ESC by the drone's flight controller, which relies on input from the human pilot's controller or an autopilot and can also take into account information from an IMU (Inertial Measurement System), GPS and other sensors.