The aircraft design is intriguing: Folding wingtips will let the 777X fit at existing airport gates while still giving the wings the lift they need. The new Boeing 777X features wingtips that fold up. You can see one of those in the upright position just behind the cockpit here. Boeing newest airliner, the 777X, will have to wait for another day to make its first flight. The company called off its planned Friday test flight because of windy conditions, after the aircraft sat on the runway for...

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