
Boeing 777X-9: Making its debut flight, the world's longest and largest twin-engine airliner rocketed down runway 34Left at 9:08 a.m. local time at Paine Field, north of Seattle, to complete a successful test run on January 25, 2020.

Air power: The 777X-9 is equipped with the most powerful engines ever mounted on a commercial airliner: General Electric GE9X. These develop an incredible 105,000 pounds of thrust apiece.

Folding wings: Each wing on the 777X-9 is the largest single composite structure in the world.
So it can fit on the same gates, taxiways and runways as other airplanes, Boeing has designed distinctive 11-foot folding wingtips that deploy just before take-off and retract upon landing.
So it can fit on the same gates, taxiways and runways as other airplanes, Boeing has designed distinctive 11-foot folding wingtips that deploy just before take-off and retract upon landing.

Greener flight: The 777X is claimed by Boeing to deliver a net efficiency gain of 13% on a cost per seat basis compared to the 365-seat 777-300ER with a 29% reduction in emissions. Boeing says its newest flagship is 22% more efficient than the world's largest airliner, the A380.

Smoother ride: A lower cabin altitude of 5,000 feet versus the typical airliner's 8,000 feet reduces the effects of fatigue and jet lag. The 777X also has higher levels of humidity to abate dehydration, cleaner air, less cabin noise, and smoother ride technology.

Coming soon: Boeing projects the 777X-9 will enter service in 2024.

Touchdown: The Boeing airplane landed safely after three hours and 51 minutes in the air.

Enthusiastic welcome: Despite more subdued celebations than is customary at such events, the airplane was given an enthusiastic reception by Boeing employees after it landed.

Aerial emotions: "It was so much fun," said Chaney, the pilot-in-command and 777/777X chief test pilot. "The moment we rotated and saw the chase plane go by, it was very emotional."