Pitch Control Margin at High Angle of Attack-Quantitative Requirements (Flight Test Correlation with Simulation Predictions)

Aircraft designs that employ relaxed static stability RSS have the following problem reduced pitching moments associated with RSS at high angle of attack AOA require a minimum pitch recovery moment or margin to guarantee a safe return from high AOA maneuvers at the most aft center of gravity CG encountered during a mission. Recent incidents and mishaps on Class IV aircraft have demonstrated a need for establishing quantitative longitudinal high AOA pitch control margin design guidelines for future aircraft. The Naval Air Warfare Center - Aircraft Division NAWC-AD is currently supporting an effort in conjunction with NASA Langley Research Center NASA LARC to quantify such requirements. NASA LaRC has conducted a series of extensive simulation evaluations to define these design guidelines.