The flight principle of multirotor drones is based on Newton's third law. It uses the rotation of the motor to generate the lift of the propeller, so as to realize the flight. For example, for a quadrotor UAV, when the total lift generated by the four propellers is equal to the total weight of the aircraft, the lift and gravity of the aircraft are balanced, so the aircraft can hover in the air. Now let's take a closer look at how multirotor drones work.

First, let's look at the effect of rotors on multirotor drones. The rotor is the key dynamic component of the drone, it is used to propel and control the motion of the drone. The rotor consists of a motor, an electric speed controller (ESC) and a propeller, which is the propulsion system of the drone. When the drone starts up, electricity generated by the battery is transmitted through the arm to the propulsion system that drives the motors and spins the propellers, converting electrical energy into kinetic energy.

The rotation of the propellers and motors creates aerodynamic force, which allows the drone to hover and rise. When the UAV moves relative to the air at a certain speed and angle of attack, the aerodynamic force of vertical motion will be generated.

To keep the drone stable, multiple rotors are designed to spin in different directions at the same speed. This allows them to counteract each other's rotational forces on the drone's body, keeping the drone stable.

This is how multirotor drones work. Lift and propulsion are generated by rotating propellers and motors, enabling drones to fly and hover in the air.