Which component of a multi-rotor craft typically controls the thrust on each rotor?

The component that typically controls the thrust on each rotor of a multi-rotor craft is the Electronic Speed Controller (ESC). Each rotor on a multi-rotor drone is connected to an ESC, which regulates the power sent to the motors. The ESC receives commands from the flight controller regarding how much thrust is needed for each rotor based on the pilot's inputs and the overall flight plan.

When the flight controller determines how the drone should move—whether it needs to ascend, descend, or change direction—it sends specific signals to the ESCs. These signals direct the ESCs to adjust the speed of each motor accordingly, which in turn modulates the thrust. This precise control over each rotor's thrust is fundamental to achieving stable flight and maneuverability.

Other components, such as the power distribution board, serve to distribute power to the ESCs and motors, but they do not control the level of thrust. The GPS module helps with navigation and positioning but does not influence the rotor speed directly. Thus, the ESC is the key component responsible for managing how much thrust is generated by each rotor, which is critical for the aircraft's flight dynamics.