FIG 3c shows the resulting attraction and {HEAD ~ repulsion forces} which move the rotor to still {TAIL ~ another stable position} shown in FIG 3d 
FIG 3c shows the resulting attraction and { HEAD ~ repulsion forces } which move the rotor to still { TAIL ~ another stable position } shown in FIG 3d
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH