Handling quality criterion for heading control

A heading control criterion based on the aileron-rudder sequencing required to achieve coordinated turns is presented. Quantification of the aileron-rudder shaping is obtained by consideration of the ideal crossfeed which completely eliminates sideslip induced by aileron inputs. The shaping and gain parameters based on this ideal crossfeed are defined and correlated with pilot opinion ratings. Excellent correlation is obtained with data from simulation of STOL, fighter aircraft, and space shuttle vehicles.