![]() Since then, APB has certified blended winglets for retrofit installation on other Boeing airplane models (see fig. Boeing adopted the blended winglet technology as standard equipment for the BBJ in 2000 and APB certified the winglets for the 737-700 and 737-800 airplanes in 2001. The resulting improvements in range and fuel efficiency interested Boeing, and in 1999, Boeing formed the joint venture company APB with Aviation Partners, Inc., to develop blended winglets for Boeing airplanes. The first blended winglets were installed on Gulfstream II airplanes. Without this transition region, the outer wing would require aerodynamic redesign to allow for the interference between the wing and winglet surfaces. The blended winglet provides a transition region between the outboard wing, which is typically designed for a plain tip, and the winglet. This article provides background about the development of blended winglets, describes the principle behind their operation, and outlines the types of performance improvements operators can expect from them.īlended winglets were initially investigated by Boeing in the mid-1980s and further developed in the early 1990s by Aviation Partners, Inc., a Seattle, Wash., corporation of aerospace professionals consisting primarily of aeronautical engineers and flight test department directors. Airplanes with blended winglets also show a significant reduction in takeoff and landing drag. The addition of winglets can also be used to increase the payload/range capability of the airplane instead of reducing the fuel consumption. gallons of jet fuel a year per airplane translates into an annual reduction of more than 4,790 tonnes of CO 2 for each airplane. For a 767 airplane, saving half a million U.S. The fuel burn improvement with blended winglets at the airplane's design range is 4 to 5 percent. The carbon-fiber composite winglets allow an airplane to save on fuel and thereby reduce emissions. ![]() ![]() More than 2,850 Boeing airplanes have been equipped with blended winglets. ![]() Blended winglets also are available as a retrofit installation from Aviation Partners Boeing for the 737-300/-500/-700/-800/-900, 757-200/-300, and 767-300ER (both passenger and freighter variants) commercial airplanes. Boeing offers blended winglets as standard equipment on the BBJ and as optional equipment on the 737-700, -800, and -900 Extended Range (ER). ![]()
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