A gas turbine engine 1 wherein said lands are adapted for rotation by forming them integrally with {HEAD ~ upstream face} of {TAIL ~ disc} 
of
A gas turbine engine 1 wherein said lands are adapted for rotation by forming them integrally with { HEAD ~ upstream face } of { TAIL ~ disc }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL