Lateral-Directional Dynamics and Roll Control Power for the Landing Approach

Lateral-directional handling qualities and roll control power requirements for executive jet and military Class II Airplanes in the landing approach flight phase were investigated in the USAF/CAL variable stability T-33 airplane. Particular emphasis was placed on the effects of crosswinds and turbulence. It was found that the ranges of lateral-directional dynamics investigated do not establish a limiting crosswind value. Roll control power requirements were determined from pilot control usage data and an investigation of the effects of limited roll control power. Available roll control power can establish a limiting crosswind component. A detailed comparison with MIL-F-8785B(ASG) requirements generally shows the present requirements to be too conservative in the landing approach phase.