Questions tagged [fuselage]

The main body of the airplane that holds the cargo and passengers.

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19 votes
3 answers
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How strong is the A380 fuselage-wing joint?

The Airbus A380 has a maximum take-off weight of almost 600 tons. How strong does the joint between the wings and the fuselage have to be so it doesn't break? And how could it be trusted unless real-...
saurabh singh's user avatar
31 votes
4 answers
21k views

Why is the fuselage on an airliner circular-shaped?

Consider the fuselage of an A300. I have noticed this not only with airliners, but also for private jets and turboprops: why is the fuselage circular-shaped? Why don't aircraft have square-shaped ...
Ethan's user avatar
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9 votes
3 answers
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What is the weight of the fuselage (only) of the Boeing 747?

I'm wondering about the weight of the Boeing 747's fuselage.
user37419's user avatar
18 votes
2 answers
6k views

Why are the intakes of some fighters not attached to the fuselage?

Look at the photo below. As you can see the intake isn't attached to the fuselage. Why? Other examples include the F-16, F-22, and F/A-18 Hornet. (F/A-18E Super Hornet Walk Around)
Roh's user avatar
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23 votes
2 answers
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What is the weight saving of windowless fuselage for cargo aircraft?

What is the weight saving of a windowless fuselage for cargo aircraft? Does anyone have a rough estimation?
mezzanaccio's user avatar
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10 votes
3 answers
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How is a wing joined to the fuselage?

I've seen this video from Airbus: This is a capture from that video: What is the process for attaching the wings to the fuselage?
XF-91's user avatar
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7 votes
2 answers
3k views

Why do most commercial aircraft have their fuselage over the wing, instead of under? [duplicate]

Almost all commercial jets today seem to have the fuselage/cabin mounted above the wing, why is this? why isn't it mounted under the wing like some freight airplanes? Examples of above and under? ...
Skogsmard's user avatar
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6 votes
2 answers
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Is there a parameter that links the areas of the fuselage and control surfaces? [closed]

Do aircraft designers look at the ratio of how much fuselage surface area can be loaded onto a given unit of wing and tail surface area including elevator, aileron, rudder etc? (Possibly, the surfaces ...
Krishnaraj Rao's user avatar
13 votes
2 answers
5k views

Why didn't the Boeing 757 share the 767 fuselage?

(Flight) Early 767 design was a trijet. The numbers-built for the 757 and 767 is +1,000 each. They are both equally successful. But why didn't the 757 feature a slightly shorter 767 fuselage to cut ...
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10 votes
2 answers
6k views

How well does a composite fuselage deal with lightning?

The metal fuselage of an aircraft, being highly conductive, protects occupants, interior components and fuel from the effects of lightning by conducting the electricity around them. Some newer ...
TomMcW's user avatar
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5 votes
3 answers
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Why is the wing of large commercial jet aircraft usually located below the fuselage?

When the wing of an aircraft is located above the fuselage, the aircraft is generally considered more stable. When the wing of an aircraft is located below the majority of the fuselage, the aircraft ...
End Anti-Semitic Hate's user avatar
2 votes
2 answers
7k views

Could some one explain me with the mathematical relations on how the double bubble fuselage cross section (example A380) is designed. [closed]

Could some one explain me with the mathematical relations on how the double bubble fuselage cross section (example A380) is designed.
user17480's user avatar
13 votes
4 answers
5k views

Why does the DC-9-80/MD-80 have this cusp in its fuselage?

The fuselage of the McDonnell Douglas DC-9-80 (also known as the "MD-80") has a pronounced cusp at floor level, as can be seen in this diagram (courtesy of Boeing, eater of McDonnell Douglas - at ...
Vikki's user avatar
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10 votes
1 answer
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What are the protrusions on the sides of the fuselage of the F-16I?

I've noticed that the F-16I has these protrusions on the sides of its fuselage. What purpose do they serve?
Madhav Sudarshan's user avatar
9 votes
2 answers
1k views

Did the cusp in the Boeing 377/C-97/KC-97’s fuselage structure cause fatigue problems?

The Boeing 377 Stratocruiser - a civilian adaptation of the C-97, a military transport which would also later be developed into the KC-97 - were derived from the B-29/B-50 family by grafting a large, ...
Vikki's user avatar
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7 votes
2 answers
1k views

Why would a passenger airliner be missing windows in the fuselage?

On many airplanes (you can take the A330 to make an example), the fuselage is not completely covered by windows. In some cases it is due to the presence of the lateral emergency exit, in some other ...
Gianni Alessandro's user avatar
5 votes
2 answers
3k views

What are these "winglets" on the roof of the 737?

I circled the parts on the fuselage in red.
Justin's user avatar
  • 79
2 votes
1 answer
2k views

What creates most drag during flight: fuselage or wings?

From pic 1, I know the drag line is below the thrust line, but I am puzzled about where the drag line is in pic 2? Secondly, what creates most of the drag in flight, is it the fuselage or the wings?
David Teahay's user avatar
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27 votes
6 answers
9k views

Why use an airplane with non-retractable landing gear for aerobatics?

I'm watching footage from Red Bull Air Race 2017 in Kazan (one example is ) and clearly at least some of the airplanes used have non-retractable landing gear. I was ...
sharptooth's user avatar
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22 votes
4 answers
9k views

Why was the SR-71 made of titanium?

The temperature of the Lockheed SR-71 Blackbird's fuselage never exceeded 500 Celsius, which, to my knowledge, would be perfectly tolerated by stainless steel. So, why titanium?
Miki's user avatar
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15 votes
1 answer
4k views

What are the two vents on the 777's left side behind the wing for?

— wikimedia.org; cropped Those have always caught my eye and I always dismissed them as equipment cooling vents. But, after finally remembering to check the flight manual, it turns out the equipment ...
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12 votes
3 answers
3k views

Why did water come into USAirways Flight 1549 if an airplane is sealed and pressurized? [duplicate]

Airplanes are supposed to be air-tight and pressurized. However, when USAirways Flight 1549 landed on the Hudson river; water started to come into the airplane. How is this possible if the airplane ...
Asynchronous's user avatar
12 votes
1 answer
14k views

What are these elements on the back of a Boeing 737?

I forgot the model of that plane but I believe it's a 737. I labeled each element for clarity. What are they? Click here for high-res.
Antzi's user avatar
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12 votes
5 answers
14k views

Why do airliners have "pressure bulkheads"?

Image source: FAA What part of the fuselage aft of the bulkhead would leak pressure? Or is it just there to reduce stresses? How does a DC-9/MD-80/90 incorporate aft bulkheads when there's a ...
user avatar
8 votes
1 answer
924 views

Would discharging a firearm in-flight cause an explosive decompression?

I was reading a BBC FAQ about Federal Air Marshals, which has this chilling quote in it: A gunfight on a passenger airliner is seen as an option only of last resort. Presuming an air marshal has ...
Danny Beckett's user avatar
7 votes
1 answer
3k views

Why are these rivets on the 777 so visible?

Look at this 777 nose: Source: Airliners.net It is full of rivets.Why are they so visible on this particular aircraft? Why doesn't the radome have rivets?
user13197's user avatar
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7 votes
2 answers
8k views

What is the stick at the bottom of the tail on a ATR-72?

During my last flight I observed the ATR-72 has a stick protruding from the bottom of the fuselage, near the back of the airplane. See the bottom of the fuselage in this picture, slightly to the left ...
Damian Darem's user avatar
7 votes
2 answers
4k views

How can air travel be so safe if the aircraft skin is only 1-2 mm thick?

Aircraft skin is not very thick at all, yet air travel is the safest form of travel. All aviation professionals know why, but most occupants of an airliner are not professionals. How can it be ...
Koyovis's user avatar
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6 votes
1 answer
3k views

What are these green "bags" on the SSJ100?

I've seen some green "bags" on the SSJ100 when they were building it. What is the purpose of these?
user13197's user avatar
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6 votes
3 answers
841 views

Why doesn't Su-57 blend the engine nacelles with the fuselage, like other 5th generation fighters?

All the current and upcoming 5th generation fighter aircraft have increasingly similar physical layouts regardless of their origin. This seems to be due to similar design choices around stealth and ...
paki eng's user avatar
  • 161
5 votes
2 answers
2k views

What was the first aircraft designed with a plug-system fuselage, and why?

Nearly all modern transport aircraft are designed with a plug-system fuselage, allowing longer and shorter variants to be built by adding or removing plugs. In addition, the plug system simplifies ...
Daniele Procida's user avatar
3 votes
2 answers
1k views

Why don’t double-bubble fuselages cause severe fatigue problems?

In response to my previous two questions about fatigue issues, or the lack thereof, generated by the cusps in double-bubble-fuselaged aircraft (Stratocruiser, DC-9-80), I received a number of answers ...
Vikki's user avatar
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0 votes
1 answer
332 views

Does installing a PTZ dome camera outside the aircraft violate any FAA rules?

I want to install a big PTZ camera at the exterior of the plane like A380 which can give the pilot a clear view while landing or taxing. I have gone through a similar question but it doesn't give any ...
NitinG's user avatar
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