GENERAL KNOWLEDGE

Detailed explanation-1: -The purpose of wing dihedral is to increase lateral stability. Angling an aircraft’s wings upward from the wing root to the wing tip is one way to add lateral stability. The wings forming a v-shape is called dihedral. Dihedral doesn’t affect longitudinal stability, nor does it increase coefficient of lift.

Detailed explanation-2: -Dihedral is the upward angle of an aircraft’s wings, which increases lateral stability in a bank by causing the lower wing to fly at a higher angle of attack than the higher wing. What it really means is that you can fly more hands off, even in turbulence.

Detailed explanation-3: -Wing sweep will help promote lateral stability. When a swept-wing airplane is sideslipping, the wing toward the sideslip will experience a higher velocity normal to (perpendicular to) the wing’s leading edge than the wing away from the sideslip.

Detailed explanation-4: -Lateral static stability is concerned with the ability of the aircraft to maintain wings-level equilibrium in the roll sense. Wing dihedral is the most visible parameter which confers lateral static stability on an aircraft, although there are many other contributions, some of which are destabilising.

Detailed explanation-5: -Dihedral is often used as a means to improve lateral stability. Figure 144(a) shows a headon view of an airplane that has dihedral where the wings are turned up at some dihedral angle to the horizontal. Under the condition shown, in straight and level flight, the lift produced by both wings just equals the weight.