a380900
Posts: 797
Joined: Fri Dec 05, 2003 11:26 pm

A380 Flaps And Landing Gear Compared To 747

Fri Nov 26, 2004 8:17 am

The 747 has a complicated and impressive landing gear. Seeing it work is very spectacular. The same can be said of the triple slotted flaps which always expand more than I expect on landings (really, it never stops).

Will the A380 offer spectacular landing gear and flaps deployment? Does anyone have infos? I know that the flaps are going to be single slotted which should be somewhat boring compared to the 747.
 
minmiester
Posts: 71
Joined: Tue May 01, 2001 2:20 pm

RE: A380 Flaps And Landing Gear Compared To 747

Fri Nov 26, 2004 9:01 am

"I know that the flaps are going to be single slotted which should be somewhat boring compared to the 747"

But also weigh far less and make much less noise on approach, to ensure it meets ICAO Stage 4 noise restriction regulations. If it can use a single slotted system to achieve the required delta CL on take off and approach, I don't see why "boring" would have anything to do with ensuring the aircraft performs.

As for the landing gear, I haven't really had a look but I would expect 6 wheel main under-fuselage bogies, 4 wheel bogies under the wings and a large 2 wheel bogie up front. The A380 is supposed to spread the pressure of its enormous landing weight out over an area such that it has less impact on runways than the 747. Whether this is achieved remains to be seen, and in any case many airports will have to upgrade taxiways, filletting etc. not to mention terminal facilities to ensure the A380 can operate effectively.

Cheers

MinMiester
 
SailorOrion
Posts: 1959
Joined: Tue Feb 06, 2001 5:56 pm

RE: A380 Flaps And Landing Gear Compared To 747

Fri Nov 26, 2004 9:07 am

Remember that the single slotted flap on the A380 is for the first and lightest plane in a series, whereas the B747 more or less has reached the end of the possible weight (ok there's always some room, but you get the idea). That's why they need triple slotted flaps. I'm not sure about the flap configuration on the A380F which has 25-30 tons more mass. Maybe they have double slotted flaps? Does anyone know?

SailorOrion
 
jetjeanes
Posts: 897
Joined: Fri Oct 15, 2004 6:42 am

RE: A380 Flaps And Landing Gear Compared To 747

Fri Nov 26, 2004 1:03 pm

Hmm single slot flaps interesting.....does anyone know anything yet if this a/c is tail heavy or where the cg is going to be??
i can see for 80 miles
 
spencer
Posts: 1518
Joined: Sun Apr 25, 2004 8:30 pm

RE: A380 Flaps And Landing Gear Compared To 747

Sat Nov 27, 2004 1:45 am

It's top heavy!!  Smile
Spencer.
EOS1D4, 7D, 30D, 100-400/4.5-5.6 L IS USM, 70-200/2.8 L IS2 USM, 17-40 f4 L USM, 24-105 f4 L IS USM, 85 f1.8 USM
 
Thrust
Posts: 2584
Joined: Wed Sep 17, 2003 12:17 pm

RE: A380 Flaps And Landing Gear Compared To 747

Sat Nov 27, 2004 5:46 am

LEt's not go jumping to conclusions that the 747 is up to its limits. Explain why Boeing is investigating the 747 Advanced project if all possibilites have been exhausted  Big grin
Fly one thing; Fly it well
 
Klaus
Posts: 20578
Joined: Wed Jul 11, 2001 7:41 am

RE: A380 Flaps And Landing Gear Compared To 747

Sun Dec 05, 2004 10:19 am

The landing gear is indeed configured as guessed by Minmiester: two four-wheeled wing gears and two six-wheeled body gear legs.

The trailing axle of each body gear bogey is steerable and has no brakes (at least on the -800). The six-wheeled bogeys cannot be stowed vertically as in the 747; They are retracted "flat" rearwards into the fuselage.

The A380 has a conventional CG configuration and is stable even without FBW intervention.

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