来自MSN4 个月
5 Reasons The Boeing 777X Needed To Have Folding Wingtips
(Photo: Tom Boon - Simple Flying) Parasitic drag - skin friction, form drag, interference drag Lift-induced drag - due to downwash from wingtip vortices The folding wingtips on the Boeing 777X ...
BBC1 年
Boeing 777X: World’s largest twin-engine jet completes first flight
The 777X is a larger and more efficient version of Boeing's successful 777 mini-jumbo. Standout features include folding wingtips and the world's largest commercial engines. "It represents the ...