The Boeing 777X is the successor of the Boeing 777 Classic. Relying on the success of the Boeing 777 Classic and some of the technologies implemented on the Boeing 787 Dreamliner, Boeing is bringing a new aircraft to the market that should be able to compete with the Airbus A350.
The first details of the Boeing 777X were published in 2011, but Boeing would hold off a launch until the Dubai Airshow in 2013. With 259 orders and commitments and a value of $95B the launch became the most succesful launch of a commercial jet in terms of dollar value.
The Boeing 777X currently is a 2 aircraft family, but Boeing is exploring opportunities to bring a stretch to the market as well, which can compete more effectively with a further stretch of the Airbus A350, the Airbus A380 and replace the Boeing 747-8I eventually. The Boeing 777-8 is the ulta-long range aircraft of the -X family and surpasses the Boeing 777-200LR in terms of capacity as well as range. The Boeing 777-9 aims to replace the Boeing 777-300ER, but just like the Boeing 777-8 does have a higher capacity as well as range. A further stretch, the Boeing 777-10X, is still subject of talks with airlines but should carry around 450 passengers.
Key to Boeing’s ability to increase range as well as capacity was the use of a carbon fiber polymer wing with a bigger span, thereby reducing specific weight and increasing aerodynamic efficiency.
The General Electric GE9X propulsion system became 5% more efficient compared to its predecessor, the GE90-115 and has been developed from the GEnx engines that power the Boeing 787.
The engine features less fanblades to cut weight and makes use of advanced materials, allowing the engine to operate more efficiently.