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A380 Flaps And Landing Gear Compared To 747  
User currently offlineA380900 From France, joined Dec 2003, 1116 posts, RR: 1
Posted (9 years 11 months 1 week 4 days 2 hours ago) and read 12861 times:

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.

6 replies: All unread, jump to last
 
User currently offlineMinmiester From Australia, joined May 2001, 73 posts, RR: 0
Reply 1, posted (9 years 11 months 1 week 4 days 1 hour ago) and read 12764 times:

"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


User currently offlineSailorOrion From Germany, joined Feb 2001, 2058 posts, RR: 6
Reply 2, posted (9 years 11 months 1 week 4 days 1 hour ago) and read 12740 times:

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


User currently offlineJetjeanes From United States of America, joined Oct 2004, 1431 posts, RR: 1
Reply 3, posted (9 years 11 months 1 week 3 days 21 hours ago) and read 12548 times:

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
User currently offlineSpencer From United Kingdom, joined Apr 2004, 1635 posts, RR: 17
Reply 4, posted (9 years 11 months 1 week 3 days 9 hours ago) and read 12099 times:

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
User currently offlineThrust From United States of America, joined Sep 2003, 2690 posts, RR: 10
Reply 5, posted (9 years 11 months 1 week 3 days 5 hours ago) and read 10605 times:

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
User currently offlineKlaus From Germany, joined Jul 2001, 21495 posts, RR: 53
Reply 6, posted (9 years 11 months 2 days ago) and read 9538 times:

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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