Boeing 777X

The Boeing 777X is a new series of the long-range wide-body twin-engine Boeing 777 family that is under development by Boeing Commercial Airplanes. The 777X is to feature GE9X new engines, new composite wings with folding wingtips, a denser cabin, and technologies from the Boeing 787. The 777X series was launched in November 2013 with two variants: the 777-8 and the 777-9. The 777-8 has seating for 365 and range of over 8,700 nmi (16,110 km) and the 777-9 has seating for 414 and range of over 7,600 nmi (14,075 km). The -9 is to fly in the first quarter of 2019 with deliveries to begin in December 2019.

	777 - 8	777 - 9
List Price	$360.5 million	$388.7 million
Market Offerability	May 2013	May 2013
Program Launch	November 2013	November 2013
Seats (2-class)	350-375	400-425
Range	8,700 nmi (16,110 km)	7,600 nmi (14,075 km)
Length	70 m (229 ft)	77 m (252 ft)
Wingspan Extended	72 meters
Wingspan On ground	65 meters
Folding wing-tip	Enables 23 feet (7 meters) more span to maximize fuel efficiency
Interior	Larger windows, wider cabin, new lighting, new architecture
Configuration	Twin-aisle
Engine	GE9X

Variants
777-8
The 777-8 is a shortened derivative of the 777-9, 229 ft (69.8 m) long, between the 209 ft 1 in (63.7 m) 777-200 and 242 ft 4 in (73.9 m) 777-300. It will seat typically 365 passengers with a range of 8,690 nmi (16,090 km). It would succeed the ultra-long-range -200LR, and competes with the Airbus A350-1000. Production on the -8 will follow the -9 around two years later. It could be the basis of a freighter version which could be available 18 to 24 months after the -8 introduction.

777-9
The 777-9 is a 9.4 ft (2.9 m) longer derivative of the 777-300ER for a 251 ft 9 in (76.7 m) length. It will seat typically 414 passengers over a range of 7,525 nmi (13,940 km). Boeing froze its design in August 2015 and should start first assembly in 2017, for an introduction in December 2019. Its operating empty weight grew from the 777-300ER's 373,500 to 400,000 lb (169,400 to 181,400 kg), just over, for the -9X target. The 777-9X should be longer than the previous longest airliner, the 250 ft 2 in (76.25 m) Boeing 747-8.

In 2014, Aspire Aviation estimated its manufacturer empty weight at 362,000 and 415,000 lb (164,000 and 188,000 kg) for its operating empty weight with 300 seats in four classes. In 2017, crowd-sourced stock advising website Seeking Alpha estimated a 167,829 kg (370,000 lb) manufacturer empty weight and a 184,600 kg (407,000 lb) operating empty weight.

777-10X
Boeing is proposing to stretch the -9 by four rows of seats to accommodate 450 passengers in a 777-10X to compete with the Airbus A380 superjumbo. It has approached several airlines including Emirates, the largest operator of both the 777 and the A380, seating between 489 and 615 passengers. The potential 263 feet (80 m) long airplane (12 ft more) is competing against a hypothetical stretch of the A350-1000 for Singapore Airlines.