PX4/Firmware — pull request #127 by julianoes (2013-01-02 22:45:22+00:00)
Title: Attention: flipped the yaw direction of multirotors in order to be compatible to APM

As I understand the yaw directions in the multirotor scripts were wrong:

As an example, let's look at Motor 1 (right, forward in a Quad x configuration):

{ -0.707107, 0.707107, 1.00 }

so negative influence in roll, positive influence in pitch and positive influence in yaw because the 1st Motor is rotating CCW so the effect on the copter is CW so positive in z down coordinates.
Do you agree or am I making a mistake and the sign in the controller is wrong?