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