A380900 From France, joined Dec 2003, 1118 posts, RR: 1 Posted (10 years 3 weeks 6 days ago) and read 13008 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.
Minmiester From Australia, joined May 2001, 73 posts, RR: 0
Reply 1, posted (10 years 3 weeks 5 days 23 hours ago) and read 12911 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.
SailorOrion From Germany, joined Feb 2001, 2058 posts, RR: 6
Reply 2, posted (10 years 3 weeks 5 days 23 hours ago) and read 12887 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?
Klaus From Germany, joined Jul 2001, 21521 posts, RR: 53
Reply 6, posted (10 years 2 weeks 3 days 22 hours ago) and read 9685 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.