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Questions tagged [airliner]

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

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67 views

Are supersonic passenger aircraft still realistic? [duplicate]

I was wondering if supersonic passenger aircraft like Concorde or the Tupolev Tu 144 can still be made and flown profitably. The Tu 144 failed because it was poorly designed. And Concord failed ...
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3answers
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Is the compressor required on jet engines? Can air be rammed into the turbine?

In the context of a common airliner (say Boeing 777), when the airplane is on the ground, and the turbines are on, air is getting sucked in and compressed/bypassed. The engine has to do work to ...
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1answer
150 views

Do redundant angle of attack and sideslip sensors use a voting mechanism, or do they display data directly?

In civil transport aircrafts (featured with dual/triple redundancy), how does airplane's Airflow angle (AoA/AoSS) sensor measurements read by the pilot? By using voter mechanism as used for airspeeds ...
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Why hasn't there been a case of an airliner breaking apart and crashing due to turbulence in the past 40-50 years?

Most of the breakups involved clear air turbulence as well, the type that still can't be detected today. Examples like: Boeing 707 (BOAC Flight 911) - which crashed near Mt Fuji BAC One-Eleven ...
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1answer
168 views

How does a headwind affect the distance that a modern passenger jet can glide?

If in an emergency and a modern passenger aircraft had to glide, will it make a big difference if the aircraft had a headwind rather than having to glide downwind to nearest airport?
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1answer
141 views

Could we use ground effect (over water) to increase an airliner's range? [duplicate]

Theoretically, would it be possible to increase the range of a modern jetliner in ground effect over the sea?
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5answers
677 views

What is the principle behind flight of airplanes? [duplicate]

What is the principle behind flight of airplanes? Need a simple answer for grade 7 student. Thank you
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108 views

Why was the minimum turbulence intensity that commercial airliners have to withstand increased?

From 50 fps turbulence intensity at VC to 90-100 fps turbulence intensity at VC. The amended FAR design criteria was introduced in 1980 or 1981 for commercial airliners. What prompted this change?
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Are empennage airfoils always symmetric in conventional airliners?

I'm specifically interested in these models: A319, B737-700, A220, E195-E2. You could call these conventional airliners, so I suppose the question is if these "conventional" planes have only ...
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2answers
129 views

How to anticipate the radius and rate of turn under specific conditions?

Given that an aircraft would normally start a turn from straight and level, how would one go about calculating the rate/radius of turn since there would be a delay before the aircraft can get to full ...
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1answer
438 views

Airport location identification from 1960s photo?

Can anyone identify the airport location in this photo? It would have been taken in late 1962 or early 1963 just before this DC-8 N9609Z took on its Canadian registration CF-TJL in April 1963. There ...
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5answers
299 views

In theory, can jetliners remain controllable after losing the entire tail section?

The scenario here is a detachment of the tail,one with the whole empennage. Could a variant of an existing model of swept winged jet airliner be made to remain controllable, using ailerons, ...
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1answer
135 views

Is a braking rotation immediately after touching down a known maneuver?

In this video the airliner landing on grass rotates high up after touching down, looks like more than it would do during take off. Is it a known possible way to drop the speed or it was more for the ...
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4answers
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Could an airliner with only one functioning engine recover from a stall?

If a modern commercial airplane such as a Boeing 787 would stall with only one functioning engine, is it possible for the pilots to right it or would it require two functioning engines?
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6answers
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What kind of problems can a flight have if passenger weight is miscalculated?

There was a widely reported news story about a TUI Boeing 737 flight, where a bug in reservations system caused 38 passenger on the flight to be allocated a 38kg standard weight as opposed to the ...
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8answers
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Could an airliner exceed Mach 1 in a zero-G power dive and safely recover?

(I looked for duplicates. I really did.) Being as it is that "safety" and this are mutually exclusive: I am stupid. I take a cruising A320, apply TOGA power, and push zero Gs until I exceed ...
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1answer
104 views

What are the difficulties in building transonic airliners?

If the sonic boom is an issue, why don't we build airliners that are capable of flying just below Mach 1? Big airliners fly at Mach 0.85 at most, and the record for current sub-/transonic civilian ...
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2answers
419 views

How much aerodynamic heating do jetliners endure?

At cruise altitude (~ 33,000 ft) and cruise airspeed (~ 500 mph) how much do present-day airliners heat up due to air friction during their journey? Probably not much because there's still ice on the ...
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1answer
341 views

Why are you not allowed to use power sockets in the seats during takeoff and landings?

Is it because the extra strain on the electrical system reduces engine performance?
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2answers
224 views

For jetliners, how is a swept wing justified over a thin wing?

For a given speed, a swept wing is a fatter alternative to a straight, thin wing. But why? Does not the sweep lengthen the wing and make it heavier? Is the swept wing chosen for the extra fuel tank ...
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1answer
161 views

What is the highest number of airliners shown flying together in a single photo?

I was re-visiting this question about a timelapse photo of multiple airliners and started wondering about the maximum number of jetliners that could be photographed together while flying. I have ...
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Could an aircraft have squashable wings that get thicker as it flies faster?

As I understand, for high speed subsonic flight a thicker wing is more aerodynamic, and at low speed, a thin wing is preferable. Could aircraft which range in speed from 180 to 620 knots (most ...
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3answers
2k views

What powers the air-conditioning on commercial planes?

How is the air conditioning system on airliners powered? I expect that the air conditioning is powered by the APU powers, but I wonder if there are other power sources used like the main engines?
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2answers
177 views

What information is recorded in aircraft sensor and maintenance logs?

I was wondering what the sensor and maintenance logs in an aircraft look like and what are the values logged? Like maybe the engine temperature, altitude, exhaust temperature, etc. I know the data is ...
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5answers
6k views

Can airliners land with auto pilot in gusty wind conditions?

Why does the pilot make so many movements? I don't see that plane is moving all that much, but his yoke movements are strong and fast. For someone who is not a pilot, it almost looks like panicked ...
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Has any airliner ever collided with a glider?

I've read about many near-collisions between gliders and airliners, but did such a collision ever happen in mid-air, actually?
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1answer
216 views

How much does an airliner cabin elongate at altitude?

How much (about) is a commercial plane's cabin elongated at cruising altitude, due to interior-exterior pressure difference? Of course there should be a slight shrinkage because of temp difference, ...
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142 views

Can a modern airliner handle turbulence forces of +5/-3G?

In the BOAC Flight 911 accident the 707 likely experienced around positive 5G and negative 2-3G. The wings of the 707 were only about as 50% as flexible as the wings of airliners today. How would a ...
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1answer
205 views

Why don't airlines place some physical separator between passengers in the planes to prevent the spread of COVID-19?

Why don't airlines place some physical separator between passengers in the planes to prevent the spread of COVID-19? A bit like the following, but adapted for cabins and viruses: (image source)
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1answer
126 views

Are modern airliner avionics spill-proof? [duplicate]

I thought about this today, and didn't find much other than a flight decades ago that made an emergency landing due to spillage causing the trim wheel to uncontrollably pitch the plane down into a ...
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1answer
773 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
2k views

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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1answer
99 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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1answer
450 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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187 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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1answer
105 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 ...
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1answer
188 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
329 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 ...
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6answers
5k views

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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2answers
438 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'...
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1answer
90 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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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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2answers
297 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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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
384 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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7answers
6k 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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2answers
205 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 ...
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1answer
131 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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1answer
127 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 ...
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0answers
72 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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