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Questions tagged [fuselage]

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

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47 votes
4 answers
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What is the offset in a seaplane's hull?

I noticed there is a little offset in a seaplane's hull (highlighted in the following picture). I suppose this is useful as it exists in all the seaplanes I know. It appears to be neither a ...
Manu H's user avatar
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33 votes
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What is this line found above the door on many aircraft?

Many aircraft have this line above the door as seen in the photos below. What is it, and what is its purpose? Source Source
user13197's user avatar
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31 votes
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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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31 votes
2 answers
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What is the purpose of the glazed round area atop the Ju 87 Stuka G?

I haven't been able to find any pictures of this feature aside from models, nor any reference to what it is. I'm going to make a complete guess and suggest it's a searchlight for night-fighting to ...
Party Ark's user avatar
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28 votes
3 answers
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Can cameras and LCD screens replace cabin windows?

Windows in aircraft create a weakness to the structure, that is why they are very small. I'm not asking about installing them in the cockpit, which would create safety pitfalls, but could the windows ...
securitydude5's user avatar
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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24 votes
2 answers
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Why is the A380's fuselage designed with a flat bottom?

I want to know if there is some explanation for why the A380 bottom is flat instead of the oval shape, just near the wings.
Robert M'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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22 votes
4 answers
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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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22 votes
1 answer
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Why are cabin doors outlined with a different color than the fuselage?

On almost all airliners I have seen, the doors are painted inside a rectangle which appear to reflect more light. This is the case whether in the aircraft has its manufacturer's paint or an airline's ...
Farhan's user avatar
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22 votes
1 answer
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What is the shiny stripe around the aft wing–body fairing on an A380?

Source: planespotters.net: 1, 2 Regardless of the airline, that part is always unpainted, and in the right conditions, it looks shiny. From below the plane, it wraps around the wing–body fairing. Is ...
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20 votes
3 answers
3k views

Why don't airliner vertical tails extend to the very aft of the fuselage?

Looking at several modern airliners, the root of the vertical tail doesn't extend right to the aft-most point of the fuselage. This seems counter-intuitive given extending the tail further aft would ...
Harry Karmel's user avatar
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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
19 votes
4 answers
6k views

Why doesn’t lightning punch a hole in the fuselage?

Electric arcing creates a huge temperature in the air around it. When lightning strikes planes, why doesn’t this high temperature air melt/deform the aircraft skin? Also can these high temperatures ...
Sohail Khan'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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15 votes
1 answer
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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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15 votes
1 answer
555 views

What is the round tube mounted on the roof just behind the windshield of a PC-6?

If you look at the below image: (image source: Wikimedia Commons) There are three "antennas" mounted on the forward portion of the cabin roof. The two rear, wing-shaped ones probably are ...
TheEagle's user avatar
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14 votes
2 answers
3k views

What is this strake near the nose of the MD-80 for?

What is this for on the MD-80? Is it a stabilizer?
Gabe's user avatar
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14 votes
2 answers
3k views

What are these lines on the fuselage of a 747?

Have a look at this picture: It's from Airliners.net (though I've modified it a lot) and shows some lines on the fuselage. What are they? Are they ...
user13197's user avatar
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13 votes
4 answers
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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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13 votes
2 answers
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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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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 ...
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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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11 votes
4 answers
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Why don't Airbus planes have perfectly smooth front sections?

From time to time I like to watch a planespotting video and I must say that one tiny detail bothers me a slight bit. Look at this Boeing plane: And at this Airbus: In particular, examine the section ...
scrrr's user avatar
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11 votes
1 answer
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What are the random, differently-coloured rectangular patches on the top of this Boeing 737's fuselage?

The top section of this green-painted Boeing 737's fuselage was slightly faded and I noticed a few dark-green, rectangular patches on its top. They look like patch kits on a bicycle tyre's inner tube. ...
Johannes's user avatar
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10 votes
3 answers
38k views

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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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
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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10 votes
2 answers
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Why were the fronts of the Messerschmitt Me-109 painted yellow?

After seeing the movie Dunkirk I learnt that the Luftwaffe didn't actually use the yellow coloring on the Me-109 until a few months after the battle of Dunkirk. Was this perhaps done to avoid friendly ...
vestland's user avatar
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10 votes
3 answers
4k views

How is a fuselage 'puncture' repaired?

Operator on phone, GoAir plane hits aerobridge How is such a 'puncture' repaired? Is the cabin pressurization also affected by such a puncture, and approximately what is the cost incurred to repair ...
anshabhi's user avatar
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9 votes
3 answers
4k views

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
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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9 votes
2 answers
3k views

What are these two holes on the forward fuselage of a Boeing 747?

Does anyone know what are the two holes are on the Boeing 747, on the left forward part of the fuselage? Source: airliners.net I guess the right hole is the E/E compartment smoke override valve, is ...
benck's user avatar
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8 votes
2 answers
1k views

How do engineers make sure UAV don't land on their front propeller?

Take, for instance, the following UAV: and suppose you have a payload with a very big volume that fits exactly in the fuselage (and there is no more space), but is extremely light. Thus, the heaviest ...
LandonZeKepitelOfGreytBritn's user avatar
8 votes
1 answer
926 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
8 votes
2 answers
2k views

What is the name for the Mitsubishi A6M Zero's one-piece wing/fuselage?

The Wikipedia article on Mitsubishi A6M Zero fighter cites an article from Life magazine published on Nov 4, 1942: The Zero's fuselage and wings were constructed in one piece, unlike the American ...
sharptooth's user avatar
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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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7 votes
2 answers
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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
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
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
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
  • 201
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
2 answers
2k views

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
6 votes
3 answers
859 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
6 votes
2 answers
4k views

How does the fuselage handle the different loads?

I have been trying to find out how the loads experienced by a fuselage are transferred between structural members (bulkheads, formers, frame assemblies, skin, longerons, stringers). I understand that ...
Nauman Shahid's user avatar
6 votes
1 answer
865 views

What are the bulges (with what look like air intakes) on the lower fuselage of the An-22?

On both side of the lower fuselage of the AN-22 there are long bulges. While the undercarriage doors are visible, they only account for a small proportion of the length, making me doubt they're just ...
Chris H's user avatar
  • 1,157
6 votes
1 answer
479 views

Why are passenger and cargo airplane noses manufactured separately from fuselages and then put together?

I was wondering why the fuselage of a passenger airplane is not built along with the nose? It might be difficult to build fuselage and wings together as one unit, but nose is a small part. Then why is ...
nk379's user avatar
  • 321
6 votes
3 answers
866 views

Are commercial aircraft required to have the model number painted on them?

On a lot of aircraft, the model number / aircraft name is clearly marked somewhere on the fuselage, e.g. "Airbus A320". Is there any rule or mandate, that all aircraft must bear the model number at ...
Firee's user avatar
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6 votes
2 answers
1k views

What is the wingtip station number on a Boeing 747?

In the figure we can see the station line even though it is not clear. I'am using that picture just for an example to make the question clearer. Main question What is the station number for wingtip ...
cat's user avatar
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