{HEAD ~ A rotor} 1, characterised by {TAIL ~ the fact} that each said second, elastomeric coupling includes a knee joint of elastomeric material housed within the associated said hole and coupled to the associated said projection by means of a splined coupling  
characterised by
{ HEAD ~ A rotor } 1 , characterised by { TAIL ~ the fact } that each said second , elastomeric coupling includes a knee joint of elastomeric material housed within the associated said hole and coupled to the associated said projection by means of a splined coupling
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH