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Boeing highlights advantages of raked wingtips on popular aircraft

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Boeing highlights advantages of raked wingtips on popular aircraft
Policy
Webp 777 300er
Boeing 777-300ER | Official Website

The Boeing 777-300ER has emerged as one of the most successful aircraft models from Boeing, with over 800 deliveries since its introduction more than two decades ago. Known for its exceptional range and engine performance, the aircraft is a staple in long-haul fleets across major airlines globally.

A key feature that sets the 777-300ER apart is its raked wingtips, which enhance aerodynamic efficiency and reduce fuel consumption by up to 2%. This design choice allows operators to save significant amounts on fuel costs annually. The concept of raked wingtips was not new at the time but contributed significantly to the success of this model.

Raked wingtips differ from traditional winglets by extending each wing with a swept-back angle, reducing drag and improving performance. On the 777-300ER, these wingtips extend each wing by about two meters and improve climb performance while requiring less takeoff length. With an aspect ratio of 9.0, they are also lighter than vertical winglets.

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Boeing first used raked wingtips on the Boeing 767-400ER in 1999 before incorporating them into both the 777-300ER and the longer-range 777-200LR. According to Boeing, "a 2 percent fuel efficiency improvement" translates into saving "$140,000 on fuel costs per year per airplane," contributing to sustainability goals by reducing CO2 emissions.

The wingspan of the Boeing 777-300ER measures just under the ICAO Code E limit due to this design choice. Korean Air Lines' Aerospace Division manufactures these raked wingtips along with a new wing-box extension for this variant.

Other Boeing models featuring raked wingtips include the freighter version of the 777 (the 777F), as well as newer models like the Boeing 787 Dreamliner and Boeing's largest commercial jet, the upcoming Boeing 777X.

As for current popularity, over half of all passenger versions delivered belong to Emirates Airline's fleet. As for future developments, despite facing delays, orders continue for various variants of the forthcoming Boeing model known as “the game-changer” - namely versions such as B77W or even smaller ones like those designated '8F'.

Organizations Included in this History
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