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Winglets Disadvantages

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Advantages of the Winglet

Winglets increase the life of engines because they reduce the engine thrust required to push the aircraft through the air. The engines of aircraft with winglets will use between 2% to 6% less fuel. The table below shows the fuel savings of a blended winglet on different aircraft. The fuel savings also result in the aircraft having a larger range. Different aircraft and routes experience different savings.

Winglets increase airline profits and/or decrease passenger fares because the airline saves costs on fuel which in turn means it’s cheaper for the aircraft to fly particular routes. Airlines, therefore, can achieve an increase in profits and/or passengers experience cheaper seat prices.

Winglets reduce the environmental impact of aircraft because the engines are working more efficiently and therefore fewer greenhouse gases are released into the air. ‘For a 767 airplane, saving half a million U.S. gallons of jet fuel a year per airplane translates into an annual reduction of more than 4,790 tonnes of CO2 for each airplane.’ [W2]

Winglets increase the aspect ratio of a wing but do not increase the load on the fuselage as much as if the wingspan was increased. 'One rule of thumb says that for an increase in wing-bending force equal to that of a one-foot increase in span, a wing’s structure can support a three-foot winglet that provides the same gain as a two-foot span extension’ [W3] An increase in wingspan and aspect ratio puts greater force on
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