A control system for a rotorcraft is disclosed. The control system
includes a stepped mixing linkage, such that a selected amount of
right-left lateral cyclic output is generated for certain amounts of
forward-aft cyclic input. The stepped mixing linkage includes two
supporting links and a floating link pivotally coupled between the two
supporting links. The ratio of the lengths of the two supporting links to
the length of the floating link is small, thereby generating a selected
lateral sinusoidal output, a selected rotation of the sinusoidal output,
and a selected ramped output in response to each forward-aft pilot input
command.