For positive stability, the center of gravity should always lie within the specified range relative to the aerodynamic center.
12.
Thus the 25 % chord position, or assumed aerodynamic center, is taken about which the forces and moment are generated.
13.
Conventional cambered airfoils supported at the aerodynamic center pitch nose-down so the " pitching moment coefficient " of these airfoils is negative.
14.
It was discovered that the craft was inherently unstable in forward flight, as the aerodynamic center of pressure was well forward of the center of gravity.
15.
Unless the wing is highly swept, these must generate large control forces, as their distance from the aerodynamic center is small and the canard surfaces.
16.
The first required the load in its hopper to be placed at the aerodynamic center, about 25 % dihedral and outer panels with 5?of dihedral.
17.
Due to the high forces involved in tail balancing loads, stabilators are designed to pivot about their aerodynamic center ( near the tail's mean quarter-chord ).
18.
For symmetric airfoils in subsonic flight the aerodynamic center is located approximately 25 % of the cambered ) airfoils the quarter-chord is only an approximation for the aerodynamic center.
19.
For symmetric airfoils in subsonic flight the aerodynamic center is located approximately 25 % of the cambered ) airfoils the quarter-chord is only an approximation for the aerodynamic center.
20.
For example, a pitching moment is a vertical force applied at a distance forward or aft from the aerodynamic center of the aircraft, causing the aircraft to pitch up or down.
