Thanks Lu,
Actually I was talking about tilting the rotor AND the mast together which hopefully would eliminate the lead lag problems you speak of. The downside to this of course is designing the gearbox such that it could be tilted without misaligning the engine input or twisting up the control system inputs. I've thought about these aspects as well and I think I can get past them without too much trouble.
Is high disc loading the reason for the tilt rotors high ROD in autorotation? It makes sense to me that it is but I don't want to make any foolish assumptions
Cheers
MaxTork