Helicopter long C.G.range.
Can someone make clear to me the purpose of developing the longitudinal C.G. range in helicopters? I'm curious to know if it's more than just being able to control the helicopter (running out of fore and aft cyclic travel). Are stability, and/or stress on main rotor mast bearings factors which also help establish the range? It's a topic that comes up often, and I figured I'd ask the experts. Thank you.