Questions tagged [airliner]

An airliner is a large, commercial aircraft operated by an airline for transporting people and/or cargo.

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7
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1answer
497 views

Do airliners have any cockpit indication of open doors?

A recent report into an "unnecessary" plane evacuation reports that, following an aborted takeoff [The senior flight attendant] then ordered an evacuation of the 169 passengers onboard, but ...
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2answers
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Have any airliners successfully landed on a runway after striking a tree?

There are many examples of aircraft striking trees during a crash sequence, usually with high fatality rates. Have any airliners struck* one or more trees and proceeded to successfully land on a ...
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2answers
362 views

What is this jet airliner flying over my house?

I took a picture of this jet flying over my house: It looks like a 737. Took place on July 14, 2020 at 4:00 PM in Long Beach, California.
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6answers
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Have there been any solo flights on airliners?

As per subject has anyone flown an airliner (737, A319 etc etc or bigger) solo? (meaning only 1 pilot alone with no passengers?) Tried to google search but did not find any reference. Question applies ...
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1answer
72 views

After the Covid pandemic, will there be an aircraft manufacturer which produced a combi aircraft anymore? [closed]

On this covid pandemic, there will be many changes in all of air travel, one of them is Combi aircraft to be rebuilt again.
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2answers
128 views

Why can airliners not fly as fast as fighter jets? [duplicate]

Why do passenger aircraft not fly at the speed of fighter jets? What factors stop them from achieving such speed?
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6answers
4k views

Why isn't the wing span of a certain airliner longer with the longer fuselage versions?

The Boeing 737 next generation models (700,800,900ER) all have the same wingspan at 117ft 5 in. Why doesn't the wingspan increase with bigger and longer models? With the 737-900 wouldn't you need a ...
1
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1answer
65 views

What safety precautions are taken for an airline prototype test flight?

Regarding the software, the equipment and the personnel. Can the crew jump out of the plane with parachutes or is it a bad idea? Additionally, if you would compare the safety of today and the 1970/80s ...
17
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1answer
2k views

What is this orange container labeled “Flight kit wheel”?

What is this orange container for? It reads Flight kit wheel. Do not remove. What's a "flight kit wheel"?
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6answers
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Are there any remaining flying boat or seaplane airliners in operation?

Is there anywhere in the world that still offers scheduled air carrier service using flying boat / seaplane types of aircraft - something akin to a proper airliner? Or are they all limited to charters ...
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1answer
190 views

Is/why isn't the Antonov 124 to 225 wing upgrade method common?

I'm told that wing redesigns (edit: for tapered, swept wings) are difficult, so variants of a model often do with a common wing optimized for the middle member. But then I read the following: Based ...
4
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1answer
158 views

Other than the 747, are there any other current, recent or planned airliners with a nose door option?

Boeing has recently announced that the 747 program is coming to an end. One of the key features of the freight 747s was the nose door, which facilitated faster loading of freight and allowed the ...
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1answer
3k views

How do airline pilots contact their company while in the air?

Sometimes airline pilots need to get in touch with their company while in the air, for example diagnosing cautionary messages or reporting a diversion. By what means is the communication channel ...
98
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15answers
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Why are planes generally painted white?

When planes come off the assembly line at the factory, they're green: So why are most painted white? Surely a darker colour would hide dirt better? Is there a reason planes are traditionally white? ...
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6answers
26k views

How much does it cost to give an airliner a fresh coat of paint?

Just a random thought I had: the weather gives a jet's paint job a battering; meaning they need to be resprayed approximately once every 5-10 years. (See How often is a passenger jet aircraft painted?)...
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2answers
358 views

Why are there so few high-wing jetliners? [duplicate]

So far, we have only seen a few civilian jet transports with high wings. All of them BAe 146, Do 328JET, seem to be regional jets. Yet military jet transports are almost completely high-wing. Why aren'...
7
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1answer
944 views

Could Mach 1.4 be a better design point for SST?

There's been a number of recent proposals for design work on low-supersonic bizjets that would cruise at Mach 1.1-1.6, the common theme being avoiding a sonic boom. The conventional wisdom is to ...
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3answers
3k views

Can airliners be considered as GA?

In a Swiss001 video, he said that the Twin Otter was a general aviation (GA) plane. But then in another video, he said that the Twin Otter was an airliner. Obviously, he's not a credible source, but ...
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1answer
85 views

What is the average angle planes wings they need to fly? [duplicate]

The planes I am talking about are everyday passenger plane's, not fighters. Do you know what the angle needs to be for it to create enough lift so the plane can fly?
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6answers
6k views

Can the APU provide emergency thrust?

By David Monniaux (Own work) [GFDL, CC-BY-SA-3.0 or CC BY-SA 2.0 fr], via Wikimedia Commons Many larger airplanes have gas turbine APUs (auxiliary power units). It seems that their exhaust is ...
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11answers
50k views

Could an electric engine provide the same performance as jet engines on current aircraft?

I have looked at various questions on this SE site regarding this topic but I have not really found a satisfactory answer. Some comments here regarding torque and power in electric motors vs gasoline ...
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2answers
253 views

Why is Bombardier selling off all of its airliner series?

Bombardier’s product lineup formerly had three separate families of airliners (in addition to its side business with the Challenger, Learjet, and Global business-jet series): The DHC-8 (Dash 8, Q-...
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1answer
2k views

Does the yaw damper require manual activation on modern airliners?

Modern commercial aircraft are equipped with yaw dampers. This post explains the feature. Now I was wondering if there is a button to manually activate and deactivate it (e.g., on a Boeing 787) or if ...
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2answers
6k views

Do airliner cabin filters trap viruses or other pathogens?

I understand that half the air in an airliner is re-circulated (per How much air is recirculated (vs. bleed air injected) in modern airliners cabin?). Of this 50% re-circulated air, what it's the ...
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4answers
5k views

Why are heavy flaps better than just a bigger wing?

Flaps increase lift during landing and T/O. But when retracted, they do nothing. The space needed to stow the common fowler flaps can't be used for anything else - fuel or structure. Extended flaps ...
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4answers
286 views

Why don't commercial aircraft use tail hook technology?

Tail hooks help drastically reduce an aircraft's speed during landing, and would therefore reduce the necessity of having long runways. So why doesn't tail hook technology be implemented into ...
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8answers
5k views

Why does it take so long to develop a passenger aircraft?

I was researching about the Boeing 737 MAX, and came across some information on a Business Insider page: But in the 2010s, Boeing tried to replicate the success of the 737NG with the 737 Max. But ...
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3answers
2k views

What is the section of the fuselage below the wings called?

Is there a specific name for the protruding section of fuselage beneath the wings? Im talking about the area where the landing gear bay often is. In the photo it's where the red Emirates logo is ...
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2answers
186 views

Did the Soviet Union build any commercial jetliners?

I read about a Wikipedia article regarding the Soviet Union's Tupolev 114 which was comparable to the time's jetliners, and brought up the question: Did the Soviet Union build any jetliners for ...
3
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1answer
189 views

Cruise Mach Number less or more than Critical Mach Number

Do commercial airplanes cruise at Mach number higher than the critical Mach number? And what is the critical Mach number of airplanes like B777 or A330?
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1answer
10k views

What are these antenna-like protrusions for on an airliner?

This is a JetBlue A320: I've always wondered what these are for, but could never find the answer. I'm guessing a few of them are for receiving information from satellites.
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1answer
100 views

What's this prominience in the B737? [duplicate]

I have recovered some spotting pictures that I made long ago and I came to realize an upper prominence in the fuselage of this Norwegian Boeing 737. I don't remember to have seen it in other 737s. ...
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3answers
23k views

How do big planes like 737 manage fresh air for passengers during flight?

How do the big planes (e.g. A380 or 737) flying on high altitudes manage to get fresh air for passengers and crew during the flight? I know the inner space of the plane used for passengers and crew ...
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1answer
126 views

Feasibility of converting long body carriers into stationary field hospitals [closed]

Considering the current pandemic crisis, and the fact that and there are thousands of grounded planes that can be put to other uses, I come with a somewhat dumb question. Is it possible to remove ...
2
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1answer
76 views

Do horizontal stabilizers on airliners have varying angle of incidence in the span-wise direction (washout or negative twist)?

Reading this question and answers, I was wondering if modern airliners with cruciform tail have some noticalbe washout or negative twist along the horizontal stabilizer's span. During cruise, if wing'...
2
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0answers
68 views

How often is a commercial (airliner) flight flown without autopilot? [duplicate]

When it comes to commercial flights, I am aware that once the aircraft has reached a certain altitude, the autopilot activates and assists the pilots in flying the aircraft. It makes being a pilot on ...
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5answers
1k views

Do aircraft use the majority of their fuel to overcome friction?

It was asserted (tangentially) in this question that airliners use most of their fuel to overcome frictional losses. Is that a true statement? If so, ...
3
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1answer
762 views

What is the maximum nose wheel deflection angle?

What is the maximum nose-wheel angle of deflection on modern commercial aircraft such as the Boeing 787? Can it deflect to 90 degrees or even more?
2
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2answers
168 views

Does joystick position control bank angle in some Airbus aircraft? And what happens when the pilot deflects the joystick when wheels are on ground?

Does joystick position control bank angle rather than directly controlling aileron/spoileron deflection in some Airbus aircraft? Also, what happens when the pilot deflects the joystick when the all ...
18
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4answers
36k views

Is flying during the day safer than flying at night?

Is there any correlation between night or day flight time and rate of accidents? To me it seems that there should not be a difference. If an airplane needs to execute an emergency landing, it has to ...
16
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2answers
2k views

Why does an airliner have a shallow descent when heavier, opposite to gliders with ballast?

Gliders utilize water ballast to, among other things, descend faster: But sometimes you need to get down fast: This is when water ballast is added. In airliners however, the heavier the plane, the ...
4
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1answer
378 views

How much does a passenger-to-freighter conversion cost?

Transforming a passenger airliner to a freighter seems to be common. If I understand correctly (do not hesitate to correct me), it basically consists of removing many components (seats, galley, ...) ...
13
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1answer
2k views

What is an airliner's “green dot speed”, and how does it vary with weight, and why?

A related question told us, quoting from an Airbus performance manual, Green dot speed (minimum gradient) is a function of weight. Comments under the question stated that the "green dot speed" ...
2
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1answer
218 views

What happens when an airplane is retired? [duplicate]

With launch of new models every few years, what happens to the older airplanes which was in service for more than decades? Where does it get stored. Who buys old airplanes? Does manufacturers buys ...
3
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1answer
217 views

What's the rattling noise on an A320?

I recently flew on an A320, and during takeoff when the aircraft was rotating, I heard a loud rattling noise. If I had to guess I would say it came from the gear below but I can't be sure. I was ...
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3answers
1k views

What would non-potable water be used for on an airliner?

Airliners have potable water tanks and distribution systems for galley functions and such; of course, this water is used for any non-potable functions as well as it's what's available on a modern ...
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5answers
387 views

How efficient would an airliner be if it did not have to carry its own fuel?

Hypothetically, if all the fuel was supplied externally or pulled from the atmosphere to where the plane had never to carry any fuel on board, how much more efficient would an airliner be? The plane ...
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2answers
158 views

Airliner headlights flashing alternately [duplicate]

I live in Portland,Oregon. I watched a large jetliner coming into the airspace heading to the airport. The red,green and tail lights were normal. But the headlights were blinking alternately. I ...
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2answers
3k views

What is the typical voltage used on jet airliners?

I have seen several parts that use 28 Volts DC, is this a standard for jet airliners (e.g., Airbuses and Boeings).
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2answers
398 views

Can ekranoplans (GEV) be more efficient than traditional airliners?

Ekranoplans or Ground Effect Vehicles (GEV) fly low enough to the ground that their wings stay in the ground effect. This increases lift and efficiency. But GEV fly in the lower atmosphere (...

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