Boeing 777X

The Boeing 777X is a new series of the Boeing 777 family under development. The 777X will have two variants; the 777-8 and the 777-9. The 777X will feature new engines, new composite wings, and technologies from the Boeing 787. It is intended to compete with the Airbus A350.

Development

777X proposal

In September 2011, Boeing released more details on proposed new 777 versions, tentatively designated 777-8X and 777-9X, and collectively referred to as 777X. The 777-9X would feature extended horizontal stabilizers compared to the -300ER and a fuselage stretch of 7.0 ft (2.13 m) to a total length of 250 ft 11 in (76.5 m) to accommodate 407 passengers. The 777-9X's planned length exceeds the 250 ft 2 in (76.3 m) length of the Boeing 747-8, currently the world's longest airliner. Wingspan was expected to increase from the current 212 ft 7 in (64.8 m) to 234 ft (71.3 m), and incorporate the use of carbon-fiber-reinforced polymer in its construction. In addition, gross weight was tentatively slated to decrease slightly from the current 775,000 lb (352,000 kg) to approximately 759,000 lb (344,000 kg) for the −9X model. Boeing was also studying an ultra long-range replacement for the 777-200LR, conceptually dubbed the 777-8LX, which would share the –9X's fuel capacity and gross weight. Its range will be 9,480 nmi (10,910 mi; 17,560 km) compared to 9,395 nmi (10,812 mi; 17,400 km) for the −200LR. The 777-8LX's fuselage length would match that of the proposed −8X at 228.17 ft (69.5 m). Preliminary estimates placed entry into service for the first 777X variants at around 2019.