Dihedral is an a/c' design to increase its lateral stability. As the wing slopes upward, once its has been rolled in one side due turbulence, down-going wing will have slideslip (higher AOA to face RAF), resulting higher lift production to roll back a/c in normal for lateral stability.On the other side, Anhedral is kinda an opposite side to increase A/C's maneuverability (in term of rolling?!), esp Super heavy military transport aircraft, like A400M. Since the A/C is super heavy which makes it difficult to roll, the Anhedral design can trade off the stability, in order to increase the maneuverability.
Then now you may concern the lateral stability in a/c with Anhedral design. Aforementioned, the Anhedral design is normally applied on heavy military transport a/c, they are also designed as "High-Wing".
"In such designs, the high mounted wing is above the aircraft's center of gravity which confers extra dihedral effect due to the pendulum effect (also called the keel effect) and so additional dihedral angle is often not required. Such designs can have excessive dihedral effect and so be excessively stable in the spiral mode, so anhedral angle on the wing is added to cancel out some of the dihedral effect so that the aircraft can be more easily maneuvered."" "- sourced from wiki.
In short, Dihedral provides positive lateral stability; as turbulence hits the aircraft, aircraft will sideslip; and the downward wing will have a higher angle of attack, which provide more lift to roll the aircraft back to original state.
How about excessive Lateral stability? What will happen if aircraft design with excessive lateral?how will it react?
Conversely, excessive dihedral has an adverse effect on lateral maneuvering qualities. The airplane may be so stable laterally that it resists any intentional rolling motion. For this reason, airplanes which require fast roll or banking characteristics usually have less dihedral than those which are designed for less maneuverability.
Dihedral is an a/c' design to increase its lateral stability. As the wing slopes upward, once its has been rolled in one side due turbulence, down-going wing will have slideslip (higher AOA to face RAF), resulting higher lift production to roll back a/c in normal for lateral stability. On the other side, Anhedral is kinda an opposite side to increase A/C's maneuverability (in term of rolling?!), esp Super heavy military transport aircraft, like A400M. Since the A/C is super heavy which makes it difficult to roll, the Anhedral design can trade off the stability, in order to increase the maneuverability.
Then now you may concern the lateral stability in a/c with Anhedral design. Aforementioned, the Anhedral design is normally applied on heavy military transport a/c, they are also designed as "High-Wing".
"In such designs, the high mounted wing is above the aircraft's center of gravity which confers extra dihedral effect due to the pendulum effect (also called the keel effect) and so additional dihedral angle is often not required. Such designs can have excessive dihedral effect and so be excessively stable in the spiral mode, so anhedral angle on the wing is added to cancel out some of the dihedral effect so that the aircraft can be more easily maneuvered." " "- sourced from wiki.
@ATVpilot plz correct me if i am wrong.
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