Damper winding 30 also reduces {TAIL ~ forces} resulting from rotation of an unbalanced force load and reduces {HEAD ~ rotor harmonics} 
Damper winding 30 also reduces { TAIL ~ forces } resulting from rotation of an unbalanced force load and reduces { HEAD ~ rotor harmonics }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD