Boeing reveals its biggest plane yet: $400m 777-9X has a wingspan so big the tips have to be folded up so it can fit into airports

Will have wingspan of 235 feet, 5 inches (71.8 meters) with hinged wingtips measuring 12 feet

777-9X will seat at least 400 passengers with a superwide cabin and larger, higher windows

By Mark Prigg For Dailymail.com Published: 13:30 EST, 4 September 2015

It is set to be the biggest passenger plane ever seen - with a wingspan so big the tips have to be folded up so it can fit into airports.

The Boeing 777-9X will be the largest and most efficient twin-engine jet in the world, the aerospace giant claims - and will begin production in 2017.
320 have already been ordered, the firm says, and will feature a wider cabin and bigger windows than even the firm's 787 Dreamliner.

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