Let me preface this question with the fact that I am not an engineer but I am confused regarding the X2 drive system.
OK...so theMGB has to drive the coax/contrarotating main rotor ....but also presumably the auxiliary propulsion airscrew too or is that driven separately from the engine in some way? Thre's obviously a cluch in there somewhere too to help transfer the power.
I've tried looking at patent diagrams but still can't figure it out so obviously need a primary grade explanation !