CEFOSKEY, don't forget to post pics when your project looks the part.
Dave, that S-69 bearing arrangement is interesting - reminds me of the axle installation i am currently doing. I can see why X2 opted to go the bearingless rotor route of Comanche though - less parts to life.
PS: Regardless of Sky's need for X2 to be a marketing success, the project alone deserves credit for the foresight shown.
IFMU, agreed duty cycle would be nP, but one of the X2 suite of technologies is active vibration control. There will be an accelerometer somewhere in the hub which alters the input signal to the hydraulic servo dual valves. Although movements will be more, this should actually help reduce the pitch link forces. Rotor figure of merit will benefit too, along with increased frame life.
Nick, i meant to ask whether the dual valves were for failsafe? I'm still reading your Heli Expo presentation for safer heli design.