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A Learjet 28/29, the first commercial aircraft with winglets. Learjet exhibited the prototype Learjet 28 at the 1977 National Business Aviation Association convention. It employed the first winglets ever used on a production aircraft, either civilian or military. Learjet developed the winglet design without NASA assistance.
The winglet and red navigation light on the wing tip of a South African Airways Boeing 747-400 Many aircraft types, such as the Lockheed Super Constellation shown here, have fuel tanks mounted on the wing tips, commonly called tip tanks The wing tip of a Quad City Challenger II, formed with an aluminum bow The wing tip of a Grumman American AA-1, showing its Hoerner style design A Piper PA-28 ...
Winglets have the opposite effect to washout. Winglets allow a greater proportion of lift to be generated near the wing tips. (This can be described as aerodynamic wash-in.) Winglets also promote a greater bending moment at the wing root, possibly necessitating a heavier wing structure
The winglets improve fuel efficiency by five percent and increase range by 200 nautical miles (370 km; 230 mi) through the reduction of lift-induced drag. [87] [88] Continental Airlines was the first carrier to order winglets for the 757-200, and in February 2009 became the first operator of 757-300s with winglets. [89]
Lift-induced vortices behind a jet aircraft are evidenced by smoke on a runway in an experiment ... Another method of reducing induced drag is the use of winglets, ...
Aircraft wings may feature some of the following: A rounded leading edge cross-section; A sharp trailing edge cross-section; Leading-edge devices such as slats, slots, or extensions; Trailing-edge devices such as flaps or flaperons (combination of flaps and ailerons) Winglets to keep wingtip vortices from increasing drag and decreasing lift
Sam Mohawk, a Boeing employee of 13 years, claimed on "60 Minutes" that some factory workers took flawed airplane parts from storage and installed them on airplanes in order to keep production ...
Winglets are small, nearly vertical fins installed on an aircraft's wing tips. The results of the research showed that drag was reduced and range could be increased by as much as 7 percent at cruise speeds. [23] [24] Winglets are now being incorporated into most new commercial and military transport/passenger jets, as well as business aviation ...