エアロジニー — あなたのインテリジェントな副操縦士。
現在のトレンド
Categories
Comparing the Size of the Boeing 777X and the 777

Comparing the Size of the Boeing 777X and the 777
The Boeing 777-9, the flagship model of the forthcoming 777X family, is poised to become the largest passenger aircraft in commercial aviation upon its anticipated entry into service in 2027. This timeline follows multiple delays that have extended the program by six years and resulted in over $15 billion in charges. Conceived as a modernized successor to the 777-300ER, the 777-9 introduces significant advancements in size, efficiency, and technology. However, its development has faced challenges, including a recently disclosed durability issue with its GE9X engines. Boeing and GE Aerospace maintain that this problem will not impact the aircraft’s certification or delivery schedule.
Size and Design Enhancements
The most striking difference between the 777-9 and its predecessor, the 777-300ER, lies in its dimensions. The 777-9 measures 251 feet 8 inches (76.7 meters) in length, approximately nine feet longer than the 777-300ER’s 242 feet 5 inches (73.9 meters). This increase in length enables the 777-9 to accommodate up to 426 passengers in a typical two-class layout, compared to 392 on the 777-300ER.
The wingspan of the 777-9 also marks a substantial increase, extending to 238 feet 10 inches (72.8 meters), significantly wider than the 212 feet 7 inches (64.8 meters) wingspan of the 777-300ER. The aircraft’s height has similarly grown, standing at 64 feet 7 inches (19.68 meters) versus 61 feet 5 inches (18.57 meters) for the earlier model.
Powering the 777-9 are the GE9X engines, the largest commercial jet engines ever constructed, with a diameter of 134 inches (3.4 meters). These engines surpass the GE90-115B units used on the 777-300ER. While GE Aerospace describes the GE9X as the most powerful commercial aircraft engine ever built, this characterization is nuanced, as engine performance encompasses more than raw power output alone.
Efficiency and Operational Range
Boeing emphasizes the 777-9’s enhanced efficiency, citing a 20% reduction in fuel consumption and emissions, alongside a 40% smaller noise footprint compared to the 777-300ER. The aircraft’s fuel capacity has increased to 162,000 pounds (73.5 tonnes), up from 146,500 pounds (66.5 tonnes), enabled by redesigned wings and structural improvements. Despite these enhancements, the 777-9’s advertised range is 7,285 nautical miles, marginally less than the 777-300ER’s 7,370 nautical miles in a standard two-class configuration. To complement this, Boeing plans to introduce the 777-8 variant, which will offer an ultra-long-haul range of 8,745 nautical miles, targeting thinner, longer routes.
Market Position and Industry Outlook
Boeing asserts that the 777-9 delivers 10% lower operating costs than its principal competitor, the Airbus A350-1000, a claim that remains contested by Airbus. Despite the technical and certification challenges faced during development, Boeing’s renewed emphasis on safety and operational reliability has helped restore confidence among airline customers. Both the 777X and 737 MAX families have attracted renewed interest in the commercial aviation market.
As Boeing advances through the final stages of certification, the 777-9 distinguishes itself not only by its size but also by its anticipated role in defining the future of long-haul air travel.

Embraer Advances Supply Chain Development in India

Leading Companies Solidify Their Presence in the Advanced Air Mobility Market

MAB Engineering Services to Provide MRO Solutions for Regional Aviation

India Plans Rooftop Vertiports for Electric Air Taxis

ALTEA Marks Delivery of New Falcon 6X Aircraft

Concerns Rise for Regional Airlines Following Recent Failures

Ethiopian Airlines Advances Digital Transformation in African Aviation

Lufthansa, Air France, and Singapore Airlines Collaborate to Test CFM Open Fan Engines

CII Supports Air Taxi Corridor in Delhi-NCR
