Gas turbine engine rotor support system

A gas turbine engine rotor support system comprising:

• an outer rotor having a plurality of outer blades extending radially inwardly therefrom in axially spaced apart blade row stages;
• an inner rotor having a plurality of inner blades extending radially outwardly therefrom in axially spaced apart blade row stages and interdigitated with said outer blade row stages;
• a stationary rear frame disposed aft of said outer and inner blades and having an annular rear support shaft extending radially inwardly therefrom;
• a rotatable aft frame disposed axially aft of said outer and inner blades and axially forward of said stationary rear frame and fixedly joined to one of said outer and inner rotors for rotation therewith, said aft frame including an aft support shaft extending radially inwardly therefrom;
• a rotatable forward frame disposed axially forward of said outer and inner blades and fixedly joined to the other of said outer and inner rotors for rotation therewith, said forward frame including a forward support shaft extending radially inwardly therefrom;
• a core turbine disposed axially forward of said outer and inner blades and having a core shaft;
• a first bearing disposed between said aft support shaft and said rear support shaft for supporting said aft support shaft thereon;
• a second bearing disposed between said forward support shaft and said aft support shaft for supporting said forward, support shaft thereon;
• and
• a third bearing disposed between said core shaft and said forward support shaft for supporting said core shaft thereon.