Questions tagged [airliner]
An airliner is a large, commercial aircraft operated by an airline for transporting people and/or cargo.
528 questions
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1answer
29 views
Is there a Risk of Tail Tipping during Push-back of a passenger aircraft?
I remember that there were countless incidents occurred in which the aircraft sits on the tail as the aircraft was heavily loaded at the back of the cargo and/or cabin compartments or the cargo ...
5
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1answer
83 views
Airliner speed when descending through 10,000 feet
How do airliners get to 250 kts when descending through 10,000 feet as required by the FAA? Do you level off at 10,500 feet until speed is less than 250 and then descend further? Must pilots ask ATC ...
2
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2answers
170 views
How much does it cost to ground a B737 max aircraft for an airline?
What are the cost items for which an operator with such an aircraft in the fleet incurs per aircraft because of the grounding of the Boeing 737 max aircrafts and how much is the average cost incurred?
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3answers
273 views
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Are there any current projects/plans for a VTOL passenger airliner?
I was very surprised to see there's a seemingly underway project for a VTOL "business aircraft" that seats a few people.
http://xtiaircraft.com , https://www.startengine.com/xti-aircraft
They ...
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2answers
101 views
Which airlines allow you to gain hours with them by paying them [closed]
As a fresh grduated pilot is there any airline that you can pay them to fly with them without a salary just to build hours?
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1answer
81 views
What are the difference between FMC, FMS and MCDU and what do they do? +2 more questions [duplicate]
What are the difference between FMC, FMS and MCDU and what do they do?
Do airliners have all of them or just 1 or 2 of them?
Do pilots learn how to program them/it?
FMC = Flight Management Computer ...
6
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4answers
316 views
Why do aircraft stall warning systems use angle-of-attack vanes rather than detecting airflow separation directly?
Stall warning and protection systems on essentially all aircraft work by using several hinged vanes on the side of the fuselage (usually at least three, and preferably more), which align themselves ...
8
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1answer
384 views
What do you need to do to bring a 737 Max back in service after 6 months in storage?
What kind of maintenance has to be performed on an aircraft if it has been stored for 6 months?
For example, do fluid need to be changed, have the tires become flat etc.
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3answers
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Do airline pilots ever risk not hearing communication directed to them specifically, from traffic controllers?
I gather pilots communicate regularly with air traffic controllers within air traffic controllers' jurisdiction or airspace as they enter the space, during their time in that space and as they leave. ...
2
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3answers
277 views
Why aren’t there any lifting-canard airliners?
A lifting-canard aircraft, such as the Long-EZ, is an aircraft with the main wing at the back end of the fuselage and a pair of small, highly-loaded canards attached to the forward fuselage; the ...
8
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1answer
388 views
What is this plastic device inside the plane window?
I saw this on a recent domestic flight. It was glued on all the windows of the plane, behind the first layer of plastic. What is it and its purpose?
16
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2answers
4k views
For airliners, what prevents wing strikes on landing in bad weather?
For any low-wing aircraft, particularly the MD-80 or some of the private jets, CRJ's, the wings appear about 5ft or less above the ground. It seems that just few degrees of roll before touchdown would ...
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1answer
99 views
Are hydraulic retractible landing gear possible
One of the impediments and drawbacks to extending landing gear in light of building larger engines are the larger space required for the taller gear. Would hydraulic retractable gear that works as a ...
6
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4answers
2k views
Are taller landing gear bad for aircraft, particulary large airliners?
Buiding larger engines for larger aircraft as opposed to smaller but many engines has proved to result in more fuel efficiency.
Having established one of the main drawbacks or impediments to building ...
5
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1answer
345 views
Why did the Mercure fail?
The Dassault Mercure was a French regional jet that first flew in 1971 and received its type certificate in February 1974; it resembled an enlarged, shorter-range 737-200, and was designed to serve ...
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3answers
120 views
What happens to unstrapped passengers if the airliner were to fly inverted [closed]
If for some reason or the other, because of an emergency, or perhaps craving jail time or did not want her job, or perhaps a girls will be girls moment, a pilot and her captain decided to fly a large ...
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5answers
277 views
Do horizontal stabilisers provide any lift?
Do jumbo and smaller airliners' horizontal stabilizers provide any lift? Apart from maintaining the aircraft's angle of attack, can they perform the dual function that includes adding some lift as ...
0
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2answers
326 views
What is a 73W aircraft [duplicate]
With all the issues surrounding the Ethiopia crash can you tell me what a 73W is? Is it a 737 Max 8. We're trying to figure out if our flights with Westjet on Friday might be effected.
Thanks
...
3
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2answers
241 views
Are any airlines actually flying the Comac ARJ21?
The Comac ARJ21, China's answer to Embraer's regional jets, was launched with great fanfare in 2016. However, if FlightRadar24 is to be believed, launch customer Chengdu Airlines does not appear to ...
4
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1answer
230 views
What is the stability of a 777-like plane if the engines flameout and the autopilot disconnects and the pilots don't make any inputs?
According to Wikipedia:
If no control inputs were made following flameout and the disengagement of autopilot, the aircraft would likely have entered a spiral dive and entered the ocean within 20 ...
2
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1answer
130 views
What is this aviation quote?
I remember hearing a quote about aviation that was something along the lines of “asking a pilot why he loves flight is like asking an artist (or a painter?).....”. For the life of me, I cannot ...
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1answer
161 views
How to understand the kinematics principle behind landing gear retraction system (or 4 bars system)? [closed]
I would like to know about the principles of landing gear retraction system and I struggle to find clear information about it.
It seems to be about a four bar systems in most cases but I would like ...
1
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1answer
112 views
Who made the first high-wing jet airliner?
I thought the only high-wing jet airliners were made by the Soviets but the British Aerospace RJ-100 and Dash 6 series twizzled my mind.
So who made the first high-wing jet airliner?
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0answers
43 views
Why there are nearly no upper wing jetliners? [duplicate]
Whenever I look at the western airliners. All of their wings are always mounted on the lower part of the fuselage except the Dash 8 series which have turbo props.
But the Soviet jetliners have their ...
4
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1answer
299 views
When does a passenger plane leave the cruising phase?
I have Flightradar24 data here. Which are in the following structure.
...
4
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2answers
191 views
What are the issues involved in converting a quadjet into a twinjet?
As you are probably all aware already, the fewer engines you have, the better your fuel efficiency; that’s why the airlines are selling off their (quadjet) 747s and buying (twinjet) 777s, why they’ve ...
0
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2answers
228 views
Did Boeing or Lockheed ever seriously consider releasing a widebody airliner powered by low-bypass engines?
During the 1960s race to build the first widebody jetliner, each of the three major engine manufacturers was racing to put out a high-bypass engine for one of those jumbo jets:
Boeing went with Pratt ...
25
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4answers
10k views
Is 'bouncing' an airliner on landing in high winds a deliberate technique, or something always unexpected?
Last week, 767 landing at Newark, high winds, a good deal of rocking in the last few minutes, some passengers quite distressed. The landing was harder and noisier than usual, and we immediately ...
5
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4answers
195 views
Do airline pilots use speed stability to cope with unreliable airspeed indications? If not, why not?
There have been a couple of airline accidents in which unreliable airspeed indications (or the fear thereof) have played a role:
Birgenair Flight 301 in 1996, where one of the pitot tubes was blocked,...
3
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2answers
173 views
Do any aircraft automatically test that the pitot-static system is functioning properly before liftoff?
Given that a properly-functioning pitot-static system is absolutely essential for flight (a plane cannot be flown without valid airspeed data, or at least not for long), are there aircraft that ...
0
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1answer
161 views
Was this a near collision or a normal procedure? [duplicate]
I flew on a plane from UK to Spain a couple of days ago (FR7542, 15/01/19 16:30) and in the middle of the flight I could see another plane (a private jet much smaller) just flying underneath us.
From ...
0
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1answer
296 views
Will we ever see a single-engined airliner? [closed]
Given the trend in the industry to move towards aircraft with two engines, could it ever occur that we see an aircraft manufacturer develop an airliner with just one?
I'm suspecting the answer is no, ...
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5answers
3k views
Why didn't Boeing or Douglas make a jet airliner before the British DH Comet?
I was looking at the history of commercial aircraft and was wondering why UK-based De Havilland was the first to produce a jet powered airliner (the DH 106 Comet) when the US had a much bigger civil ...
5
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3answers
479 views
How often does an airline pilot use the rudder pedals during flight?
How often does an airline pilot use the rudder pedals during flight? Is it only during takeoff and landing?
I am interested to know the rudder pedal usage time in minutes per average short range ...
0
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1answer
170 views
What is the acceptable position of the brake wear indication for A320?
What is the acceptable position of the brake wear indication (PIN) for an A320 to be safely dispatchable?
2
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1answer
818 views
Can pilots smoke in the cockpit of an airliner?
An answer on travel.se suggests that some pilots are smoking on long-distance passenger flights.
Can passenger airliner pilots smoke if both the captain and first officer agree it’s ok? If I recall, ...
0
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1answer
112 views
Does the FAA allow a jet bridge to approach an aircraft that has engine #2 running?
Does the FAA allow a jet bridge to approach an aircraft that has engine #2 running?
9
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3answers
2k views
Is the bleed air passengers breathe tapped from the engines before or after it comes in contact with fuel? And why? Isn't this unhealthy?
Passengers are often surprised to hear that the air they breathe comes from inside the engines.
This sounds unhealthy. Can you explain, why it is not ?
Is bleed air tapped (for cabin pressurization) ...
4
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0answers
107 views
Which individual aircraft has carried the most passengers in its lifetime?
I'm guessing that the aircraft will be one of the 747s that service the domestic Japanese market, making regular short hops full of passengers - but perhaps actual figures exist to confirm this.
See ...
3
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1answer
160 views
Which airliners have carried the most passengers?
I'm fairly sure that the Boeing 737 series will be in first place, with the Airbus A320 family coming second and perhaps the 727 third.
However, perhaps there are some estimates of actual figures ...
5
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1answer
119 views
Detecting faults in CVR mic inputs
Years ago my father worked for Eastern Airlines out of Miami (that should give you a timeframe) and he was an electrical engineer. I recall once he told me that the pilots (one or more) used to ...
0
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1answer
137 views
How can I identify airliner types that don't have ACARS?
Is there a way to identify what commercial airliners are still flying without ACARS today? Most modern commercial airliners are equipped, but I know some 737s still fly without ACARS, for example.
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0answers
28 views
How much fuel does an airliner consume at various stages of operation? [duplicate]
I used to think that almost all of an airliner's fuel consumption was during actual flight; but it seems that even while on the tarmac or at a gate it consumes a non-negligible amount.
So, in general ...
8
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1answer
365 views
When were the last subsonic turbojet-powered airliners retired from commercial passenger service?
The very first jetliners (Comet, Tu-104, Caravelle I-VI, 707-120/-220/-320, DC-8 series 10-30, original 720, CV-880) all used turbojet engines, turbofans not being available until later; when ...
22
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6answers
8k views
Why then don't aircraft fly even higher, for even greater efficiency? [duplicate]
After reading various superb QA on here I now see that (basically) aircraft are more efficient per passenger-mile, at higher altitudes.
Why don't we go even higher, than current typical airliner ...
1
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1answer
270 views
Lift to drag ratio of airliners
I don't know if this is the right place to ask, but I am looking for lift-to-drag ratios (L/D) of different airliners. I have found a paper [1] which has some estimates of L/D for some jetliners, but ...
73
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4answers
24k views
How did the 9/11 hijackers find their way to New York City?
It is quite well known that the airplane hijackers on 9/11 were not professional pilots. So, my question is how some people who didn't have any experience of navigating the airplanes could find their ...
19
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2answers
4k views
Why aren't there any widebody propliners for the high-density short-haul markets?
Jetliners come in both narrowbody (one aisle) and widebody (two or more aisles) versions, but all propliners, to the best of my knowledge, are narrowbody aircraft.
Now, granted, one of the big ...
0
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0answers
91 views
Can audible warnings be heard from the cabin?
When I fly in the front row on an all-economy A320, I can very clearly hear the autopilot disconnect sound shortly before landing.
Can passengers in the cabin also hear other warnings like EGPWS (...
6
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2answers
446 views
How and how often are the oxygen masks in the cabin checked?
Looking at this old answer I can see that oxygen masks check is mandatory for the flight deck. What about passenger masks?
Is this check done daily on airliners?
How is this check conducted and what ...
