The 777 wing is the most aerodynamically efficient airfoil ever developed for subsonic commercial aviation. The 777's advanced wing enhances the airplane's ability to climb quickly and cruise at higher altitudes and speeds than competing airplanes. It also allows the airplane to carry full passenger payloads out of many high-elevation, high-temperature airfields. Raked 6.5-foot wingtips are being added to the 777-200LR and 777-300ER to improve the overall aerodynamic efficiency of the wing. The raked wingtip helps reduce takeoff field length, increase climb performance and reduce fuel burn.