Sim/flightmodel/position/Q

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sim/flightmodel/position/q is a four-item float that represents the sum of the plane's orientation in local cartesian coordinate space as a quaternion.

When the flight model is active, this quaternion is the plane's master position; writing to it will change the plane's orientation. Writing to the pitch heading and roll of the plane will have no effect; see MovingThePlane for more info.

sim/flightmodel/position/Q is the yaw rotational rate of the plane in degrees per second. See MovingThePlane for more info.

Datarefs are case sensitive (but this web site is not).