legolars
Posts: 85
Joined: Tue Sep 25, 2001 6:39 am

How Much Can Upper-Deck Be Streched On 747-400?

Tue Nov 27, 2001 12:28 am

Could boeing quiete easy make a A380 competitor, or is there a limit?
 
rw774477
Posts: 1032
Joined: Wed Feb 14, 2001 4:15 am

RE: How Much Can Upper-Deck Be Streched On 747-400?

Tue Nov 27, 2001 3:06 am

$$$$$$$$$$$$$$$
 
Chiuaua
Posts: 102
Joined: Sun Apr 16, 2000 9:31 pm

RE: How Much Can Upper-Deck Be Streched On 747-400?

Tue Nov 27, 2001 3:18 am

Not "quite easy". They would have to design the 747 from the start again. That would actually make it a whole new aircraft.

Greetz, Chiuaua.
 
prebennorholm
Posts: 6562
Joined: Tue Mar 21, 2000 6:25 am

RE: How Much Can Upper-Deck Be Streched On 747-400?

Tue Nov 27, 2001 3:45 am

The 747-400 has come very much to the limit of what the 747 wing can handle. An increased capacity 747 will require a new wing, revised landing gear and all such things - like the 747X proposal which was shelved about a year ago.

The 747X would have been an almost entirely new plane where little more than the 747 fuselage cross section would be reused. (Please do not confuse with the 747-400X which now has been renamed 747-400LR).

Have a look at the A380 wing. It has a 50 feet greater span. It is an entirely different sort of animal, and it has some growth potential for future stretched A380s. Just in case it should be viable to market such a thing in 2020 or 2030 or such.

Regards, Preben Norholm
Always keep your number of landings equal to your number of take-offs
 
Joni
Posts: 2613
Joined: Thu Aug 10, 2000 11:05 pm

RE: How Much Can Upper-Deck Be Streched On 747-400?

Tue Nov 27, 2001 4:02 am


I've got an impression that for aerodynamical reasons, the "hump" in a 747 needs to end at about where the wing is.

Besides, to compete against 380, you'd need to stretch the upper deck both backwards and sideways - and that certainly wouldn't be a mean feat.
 
transswede
Posts: 995
Joined: Fri Sep 21, 2001 9:30 am

RE: How Much Can Upper-Deck Be Streched On 747-400?

Tue Nov 27, 2001 4:43 am

There is also a center-of-mass issue. If the upper deck is extended behind the wing, the plane will become more rear-heavy, forcing them to either A) stretch the fuselage in front of the wing or B) move the wing back a bit,

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos