UAL747
Posts: 6725
Joined: Mon Dec 13, 1999 5:42 am

777 Wing Design

Sun Feb 06, 2000 11:13 am

I have flown the 777 several times on trans-pacific and trans-atlantic flights as well as domestic. Everytime I get on the plane, I am amazed at how high the wings are swept upward. When I look out the window, it seems as though the wingtips are almost as high as the fuselage of the plane. When you get airborne, it seems as though they rise even more. On the DC-10 and MD-11, the wings just seem to go straight out. When we arrived at LGW from DFW, we parked next to a British Airways 747-400 and our wings were considerably higher than those of the 747. Why are these wings so high? What purpose does it serve or is it just a design characteristic that has nothing to do with performance? In any case, its very impressive to see those big wings reach upward like that.
"Bangkok Tower, United 890 Heavy. Bangkok Tower, United 890 Heavy.....Okay, fine, we'll just turn 190 and Visual Our Way
 
D L X
Posts: 11663
Joined: Thu May 27, 1999 3:30 am

RE: 777 Wing Design

Sun Feb 06, 2000 11:27 am

You are correct that the 777 wing is more dihedral (upwardly bent) than other designs. I've been told that this is partially for ground clearance reasons. The engines on the 777 are frickin' huge! In order to keep them from hitting the ground on landing, the wings supported them were bent up a little extra to give them more clearance. (That and the landing gear are rather long.)

BTW, all wings bend upward when the plane takes to the air.
 
UAL747
Posts: 6725
Joined: Mon Dec 13, 1999 5:42 am

RE: 777 Wing Design

Sun Feb 06, 2000 11:36 am

Yes, I was aware that they all bend upward, but the wings on the 777, since they are upward swept anyway, when they bend upward, it makes the effect more apparent. Thanks for the info!
"Bangkok Tower, United 890 Heavy. Bangkok Tower, United 890 Heavy.....Okay, fine, we'll just turn 190 and Visual Our Way
 
Guest

RE: 777 Wing Design

Sun Feb 06, 2000 8:56 pm

http://www.egroups.com/group/triple7 is a web link