NASA Technical Paper

airspeed angle of attack approach profile approach task basic aircraft mode breakout changes characteristics CHOKE control input control technique CTOL deceleration decision height deg/deg descent director bar director control laws display dynamics EADI effect employed final straight flight-director control laws flightpath angle G. H. Hardy gain gain scheduling glide slope glidepath control glidepath error glidepath tracking groundspeed guidance errors HEIGHT ERROR investigation knots lift LIMIT longitudinal m/sec maneuver ment microwave landing system MODILS NASA navaid NAVIGATION ERROR nozzle angle operations performance PITCH ANGLE pitch attitude pitch director pitch flight director powered-lift aircraft powered-lift STOL aircraft proprioceptive R-NAV range relative result ROLL FLIGHT runway SAS modes schedule segment shown in figure simulator SPEED ERROR speed-control SAS SPFD STOL control concepts STOLport TACAN terminal-area three STOL control throttle director throttle flight director thrust vector tion touchdown tracking box vector velocity vertical wind