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.
A wingman (or wingmate) is a pilot who supports another in a potentially dangerous flying environment.Wingman was originally a term referring to the plane flying beside and slightly behind the lead plane in an aircraft formation.ccording to the U.S. Air Force, The traditional military definition of a Wingman refers to the pattern in which fighter jets fly. There is always a lead aircraft and another which flies off the right wing of and behind the lead.