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95 votes
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Why is the lower deck of the Airbus A380 curved like a single deck airplane?

The cabin interior is curved to accommodate, among other things, the brackets holding the upper deck floor beams. These brackets are a structural feature that transfers the weight of the upper deck ...
Therac's user avatar
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39 votes

Why is the lower deck of the Airbus A380 curved like a single deck airplane?

Consider this photo of the cross-section of the A380 and the illustration below. You can see the cargo deck on the bottom, the lower deck (where you sat) in the middle, and the upper deck on the top. ...
Zach Lipton's user avatar
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36 votes
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What are the "lumps" in the A380 flight-deck?

They are a different design of computer mouse: As far as I can tell, the front disk is a track pad and the model in your picture has the mouse buttons on the front instead of the sides:
Unique Worldline's user avatar
35 votes

How many flight hours do the first retiring A380s have?

The A380 that was being scrapped was the 3rd aircraft on the production line. After being used for a short time in the test fleet of Airbus, it became the first line number that was delivered to a ...
DeltaLima's user avatar
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35 votes

Why is the A380's fuselage designed with a flat bottom?

There are 2 main reasons: The wing spars run through that area. If you wanted to keep the wing spar within the oval cross-section, you'd have to install the wing much higher on the fuselage which ...
Hobbes's user avatar
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31 votes
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How many flight hours do the first retiring A380s have?

No they are nowhere near being worn out. These aircraft are normally designed for anywhere from 40-60,000 cycle lifespans, and more on shorter haul a/c (depending on how long each cycle is), perhaps ...
John K's user avatar
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29 votes
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Is the entire length of a B747 or A380 wing used as a fuel tank?

Fuel tanks take most of the space in aircraft wings, but not all. There are other things on wings too. They are ailerons, flaps, slats, air brakes. On most airliners, the engines are attached to the ...
Farhan's user avatar
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29 votes
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Why is the A380’s with-reversers stopping distance the same as its no-reversers stopping distance?

In all Airbuses auto-braking system aims for specific deceleration. Once the design target has been reached, the system does not apply more brake pressure although there usually is more available. So, ...
busdriver's user avatar
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27 votes
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Is turning off engines before landing "Normal"?

There's virtually no chance of the pilot deliberately switching off all 4 engines, and even less chance of all 4 engines failing at the same time. It's not entirely impossible for it to happen, but it ...
Jon Story's user avatar
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27 votes
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Why Is This Tyre Square On The BA A380?

According to this document about the landing gear system, the wheel dimension of the main lading gears is 1400x530 R23. This is not the standard notation known from car tires, but it says that the ...
sweber's user avatar
  • 7,257
26 votes

Why does the wing root of the A330 have a pronounced twist?

Short answer: To create a funnel for all the air streaming towards the fuselage. Slightly longer answer: Air approaching a swept wing will be accelerated towards the area with the lowest pressure and, ...
Peter Kämpf's user avatar
26 votes

Would increasing the number of wheels of a Jumbo reduce the braking distance?

Typically, a little gain is obtained. Larger airplanes use anti-skid technology. Anti-skid works by modulating brake pressure to ensure the tires never skid. It's important to understand the relation ...
MrBrushy's user avatar
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26 votes
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Why are the largest civilian aircraft not adapted for military use?

There are several angles to this question, so I'll try to address what I think is important. My so-far short career has so far involved working almost exclusively with 747 derivatives, so I don't have ...
Peter Schilling's user avatar
24 votes
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What was used instead of the failed engine when ferrying the Air France Flight 66 aircraft back?

Here's another article from Oct 15th. They flew out a spare A380 engine. As of the 15th, it wasn't clear yet if this engine will be connected and running during the flight, or if it'll just be there ...
Hobbes's user avatar
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22 votes

Why does a Boeing 747-8 take more runway length to take off, compared to an Airbus A380?

This table compares some relevant numbers for the two aircraft: Aircraft Airbus A380 Boeing 747-8i MTOW 575 000 kg 447 700 kg Wing Area 845 m² 554 m² Wing Loading 680 kg/m² 808 kg/m² Thrust 4x ...
Bianfable's user avatar
  • 55.9k
21 votes

What is this little door on the upper deck of the A380?

It's for the emergency slide. You can see it deployed here: Source: Airliners.Net
Simon's user avatar
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19 votes

Do the A380 ailerons act as air brakes on landing?

Yes the ailerons deflect upwards after main wheel touchdown to dump as much lift as possible: they work as lift dumpers, together with the spoilers which are deployed first. Source: an A380 pilot ...
Koyovis's user avatar
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18 votes
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Would increasing the number of wheels of a Jumbo reduce the braking distance?

Increasing the number of wheels with brakes will decrease the braking distance as there's more sources of friction to convert the kinetic energy. Doubling the number of wheels per brake (I think what ...
GdD's user avatar
  • 54k
17 votes

Why do some A380 main wheels have no brakes?

Because they are not needed (for the passenger variant). Addition of brakes increases the weight and complexity of the system, which is undesirable. Why add something that is not required?. If it is ...
aeroalias's user avatar
  • 100k
17 votes
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Can an Airbus A380 or Boeing B747 fly with only 2 engines?

First, my experience was with 747-100/200 aircraft. However, I'm reasonably certain that the subsequent variants of the 747 would perform just as well, and I would be surprised if the A380 did not as ...
Terry's user avatar
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17 votes
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Is it possible to convert a passenger A380 to carry cargo?

Airbus originally planned on a freighter version and UPS and FedEx both ordered some of them. Production delays with the passenger version resulted in the freighter version being delayed and both of ...
nodapic's user avatar
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16 votes
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Why do some A380 main wheels have no brakes?

According to this presentation by Claude Lelaie (Head of A380 test), the brakes of the A380 were tested before certification with 89 MJ, and after certification with 120 MJ. According to your ...
Jenc's user avatar
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16 votes
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What are these panels underneath the wing root of a A380?

They are indeed the Ram Air Outlet Doors. (source, showing Ram Air Inlet (RAI) and Ram Air Outlets (RAO)) From the A380 FCOM (21 - Air Conditioning): PACK DESCRIPTION The hot bleed air flows ...
Bianfable's user avatar
  • 55.9k
15 votes
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How does the A350/380 operate on Variable Frequency AC generators?

Not specific to aviation but general electric equipment: AC with a consistent frequency is important whenever you transmit power through solenoids directly fed from mains voltage. Now, traditionally, ...
leftaroundabout's user avatar
15 votes
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How much fuel does an A380 hold and where?

The total capacity of fuel tanks of Airbus A380 is 320000 liters. The fuel tanks in Airbus A380 are shown in this image. Image Source The capacities of different tanks are1 (in liters): Tail tank: ...
Farhan's user avatar
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14 votes
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Are the A380 engines interchangeable (given they are not all equipped with reverse)?

The Airbus A380 comes with two engine choices: Rolls-Royce Trent 900 Engine Alliance GP7000 The thrust reversers are not part of the core engines. The reversers are developed by the company which ...
Bianfable's user avatar
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