Dihedral Angle is the upward angle from horizontal of the wings of a fixed-wing aircraft, or of any paired nominally-horizontal surfaces on any aircraft. It could also apply to the wings of a bird.
dihedral angle - The upward angle of the wings that is formed where the wings connect to the fuselage.
Dihedral Angle. The angle at which the port and starboard mainplanes of an aeroplane or glider are inclined upwards to the lateral axis.
The dihedral angle is the angle made between one wing and the horizontal, as viewed from the nose or tail of the aircraft. The uptilt of wing panels toward the tips.
-The method of setting the wings of a machine at a dihedral angle is as follows: Place two tacks in the~ leading edge of the upper plane, one tack near the tip of each wing and exactly -the same distance out from the tack in the center section.
wide, mounted in two halves at a very slight dihedral angle, on top of a steel tube with conical ends which contained the compressed air. This reservoir was 4 3/4 in. in diameter and 33 1/2 in.
The dihedral angle is the angle that each wing makes with the horizontal (see
Wing Geometry).
If a disturbance causes one wing to drop, the lower wing will receive more lift
and the aircraft will roll back into the horizontal level.
The rolling moment (i.e. the roll-wise torque) will be proportional to the dihedral angle, and proportional to the amount of slip.
9.2 Other Forms of Slip-Roll Coupling ...
 See also: Plane, Dihedral, Pilot, Propeller, Stability
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