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The term "winglet" was previously used to describe an additional lifting surface on an aircraft, like a short section between wheels on fixed undercarriage. Richard Whitcomb's research in the 1970s at NASA first used winglet with its modern meaning referring to near-vertical extension of the wing tips . [ 10 ]
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 ...
Such wings however have disadvantages with respect to structural constraints and maneuverability, as evidenced by combat and aerobatic planes which usually feature short, stubby wings despite the efficiency losses. Another method of reducing induced drag is the use of winglets, as seen on most modern airliners.
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
A closed wing is a wing that effectively has two main planes that merge at their ends so that there are no conventional wing tips.Closed wing designs include the annular wing (commonly known as the cylindrical or ring wing), the joined wing, the box wing, and spiroid tip devices.
A winglet is a short fin that projects upward from the wing of an aircraft. They are used to reduce aerodynamic drag. CNBC has requested comment from a spokesman from Trump’s presidential ...
These planes are popular with airlines because they can connect profitable cities that previously required a high-capacity wide-body plane like the Boeing 767 or Airbus A330.
Some early aircraft had fins mounted on the tips. More recent aircraft have wingtip-mounted winglets to reduce the induced drag. [14] Winglets also provide some benefit by increasing the vertical height of the wing system. [6]: 4.10 Wingtip mounted fuel tanks and wing washout may also provide some benefit. [citation needed]