Appendix A Glossary

APPENDIX A

GLOSSARY

Angle Of Attack (AOA): The instantaneous angle between a reference line on the airplane

(usually the wing chord line) and the relative wind direction. AOA is depicted in Figure A-1.

Figure A-1 Angle of Attack

Aerodynamic Coupling: An aerodynamic characteristic affecting dynamic stability, which

results when a disturbance about one axis causes a disturbance about another axis (e.g., a

combination of yawing and rolling motion resulting from rudder deflection).

Body Axis System: The system by which the axis of flight or aircraft movement are determined.

The airplane body axis system is shown in Figure A-2.

Figure A-2 Axis

GLOSSARY A-1