Sets whether the rotation of the HingeConstraint is actuated and, if so, what kind of actuation.

When ActuatorType is set to None then the hinge can swing freely:

When ActuatorType is set to Motor then the HingeConstraint will attempt to rotate at a constant velocity specified by HingeConstraint/AngularVelocity. The HingeConstraint will apply a torque up to HingeConstraint/MotorMaxTorque to achieve the desired velocity but will be limited by HingeConstraint/MotorMaxAcceleration.

When ActuatorType is set to Servo then the HingeConstraint will attempt to rotate to an angle specified by HingeConstraint/TargetAngle. The HingeConstraint will attempt to rotate towards that goal at a target speed set by HingeConstraint/AngularSpeed. The maximum torque the HingeConstraint is allowed to use to meet these goals is set by HingeConstraint/ServoMaxTorque.