In the idling mode, there is an upper limit to {TAIL ~ a pitch angle} of the blades 8 and under the control of {HEAD ~ the control unit} 40, the pitch drive mechanism controls the pitch angle of the blades 8 in the range that does not exceed the upper limit 
In the idling mode , there is an upper limit to { TAIL ~ a pitch angle } of the blades 8 and under the control of { HEAD ~ the control unit } 40 , the pitch drive mechanism controls the pitch angle of the blades 8 in the range that does not exceed the upper limit
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH