A rotor system (12) for a helicopter (10) includes a rotating shaft (82).
A gimbaled hub assembly (56) is coupled to the rotating shaft (82).
Rotating blades (24) and non-rotating blades (33) are coupled to the
gimbaled hub assembly (56). The non-rotating blades (33) provide lift for
the helicopter (10) in forward flight unloading the rotating blades. The
rotating and non-rotating blades (24, 33) provide equal and opposite
rolling moments for lift offset operation.