A replaceable unit in accordance 26, wherein the integral rotor has {HEAD ~ a ring shaped rotor disc} in which electromagnetically active components of {TAIL ~ the integral rotor} are accommodated and to which rotor blades are fastened 
A replaceable unit in accordance 26 , wherein the integral rotor has { HEAD ~ a ring shaped rotor disc } in which electromagnetically active components of { TAIL ~ the integral rotor } are accommodated and to which rotor blades are fastened
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH