Skin discoloration can be due to changes in melanin. Melanin is a skin pigment that gives color to the skin. Changes in melanin can also cause skin to be patchy. Treatment for skin discoloration includes using topical treatments.
Winglets increase an aircraft's operating efficiency by reducing what is called induced drag at the tips of the wings. An aircraft's wing is shaped to generate negative pressure on the upper surface and positive pressure on the lower surface as the aircraft moves forward.
WINGS Wings develop the major portion of the lift of aheavier-than-air aircraft. Wing structures carry some ofthe heavier loads found in the aircraft structure. Theparticular design of a wing depends on many factors,such as the size, weight, speed, rate of climb, and use ofthe aircraft.