Systems and methods directed to a rotor blade assembly for an unmanned aerial vehicle (UAV) are provided. A system may include a rotor blade assembly including an axle assembly, a first rotor arm supporting a first rotor blade and coupled to rotate about the axle assembly, a second rotor arm supporting a second rotor blade and coupled to rotate about the axle assembly, and a torsion spring coupled to the first rotor arm and the second rotor arm, such that a rotation of one of the first rotor arm or the second rotor arm about the axle assembly applies a spring force to the other of the first rotor arm or the second rotor arm. Additional systems and related methods are also provided.

A rotor blade pitch actuator has a first and second motor configured to control the rotor blade pitch. An actuator control system is configured to drive the first and second motor such that backlash is either eliminated from the system or minimized to an acceptable level.

A rotor blade pitch actuator has a first and second motor configured to control the rotor blade pitch. An actuator control system is configured to drive the first and second motor such that backlash is either eliminated from the system or minimized to an acceptable level.