Aerodynamic Center by NASA Glenn Research Center
= Aerodynamic Center by NASA Glenn Research Center
https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/aerodynamic-center/
Originating NASA educational account. Sections Angle of Attack and Aerodynamic Center distinguish the nearly angle-independent pitching moment at the aerodynamic center from the moving center of pressure; the low-speed quarter-chord position is an approximation, not a universal location.