Hello. I have two identical drones. Drone number 1 used to fly stably, but after some time it started to experience oscillations. Nothing on the drone was changed. Later, even after replacing the motors, propellers, and the autopilot, it was still vibrating.
Both drones use a Matek H743 flight controller, 900KV motors, 10-inch propellers, and an H-type frame. Drone number 2 has no problems at all. I can’t understand what could have changed over time.