Questions tagged [airbus]

Based in France, and with significant activity across Europe, the company produces approximately half of the world's jet airliners.

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The evolution of commercial airliner wing twist distributions over time

As far as I understand, wing twist is used by commercial wing designers to make the span-wise distribution of lift as elliptical as possible for tapered wings, increasing the span-efficiency factor ...
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1 answer
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What is the difference between A321neo and A321neo LR?

According to the illustration on this Airbus webpage about the A321Neo XLR, the A321Neo has 3500 NM range and A321Neo LR has 4000 NM range which is in conflict with this Airbus website about the ...
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Why do the ailerons on an A320 droop when the engines are shut off and the 787 ailerons dont droop when the engines are shut off?

I have been wondering why the ailerons on the A320 (and other Airbus aircraft) droop when there is no power from the hydraulic pump. From my understanding of hydraulic actuators, the position where it ...
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Where does the Foot Warmer of an Airbus heating?

1 or 2? The foot warmer of my company's aircraft is not working.
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3 votes
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What is "taxi speed" for an Airbus?

In the FCOM we can see a lot of "taxi speed", for example after landing: AT TAXI SPEED, ALL REVERSER LEVERS......STOW But what is taxi speed? Is there any definition or particular number? ...
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7 votes
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Can air traffic control see control panel selections (I.e. FCU on A320 or MCP on B737)?

I have flown with a few captains that have told me that air traffic control can see the settings we set on the FCU (or MCP on B737): Is this actually correct? I'm aware that ATC can see what speed, ...
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Comparisons between the A340 and 747-200 wing: sweep angle and span

Here is a picture of the wings of the A340 (launched in the late 1980s) and the Boeing 747-200/400 (launched in the early 1970s / 80s) superimposed upon each other (source: https://www.amazon.com/...
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4 votes
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Why is 5 seconds the time to respond to a TCAS RA?

With TCAS, the time to respond to an RA is 5 seconds (2.5 seconds for a reversal RA). The FCOM states that the TAU (estimated time) before the aircraft intruder reaches the "Closest Point of ...
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Is Airbus offering to retrofit older A350s with the new winglets?

I noticed that new winglets (sharklets?) on the A350 are extended as part of the PIP (Performance Improvement Package). Are older A350s being retrofitted with the new sharklets? Does Airbus even offer ...
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How has Computational Fluid Dynamics improved commercial airliner wing design?

Starting the 1980s, extremely powerful computational fluid dynamics software has been used to design wing sections and whole wings. I am going to focus on the Boeing 777 as an example of CFD applied ...
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How have engineers managed to increase commercial airliner wing aspect ratios over time?

Over time, the wing aspect ratios of commercial airliners have increased. For evidence ,see the following data: 1980s: Boeing 747-400: 7.91, Boeing 757-200: 8.0 Boeing 767-300: 8.0 Airbus A310: 8.8 ...
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Why didn't ejection seats become a thing in civil avation and only limited to military? [duplicate]

Recently, an Indian CDS Bipin Rawat and his family as well as eleven members of the Indian Army died in an helicopter crash. You can find the story here. I did look at any questions asked on the topic ...
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Does aircraft manufacturers provide option to exchange older models?

Most of the vehicle manufacturers provide exchange value for older models when buying a newer one. Like you can exchange your old BMW 3 Series for new 3 Series or upgrade to 5 Series and so on. Is ...
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What impact had the removal of the horizontal stabilizer end plate on the H135?

In the last update of the H135 helicopter line (EC135 T2 -> EC135 T3) Airbus removed the end plate at the horizontal stabilizer on the tail. I heard from some some people that they had aerodynamic ...
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How does the Boeing 737's implementation of RNAV and VOR approaches compare to Airbus? [closed]

How does the Boeing 737's implementation of RNAV and VOR approaches compare to Airbus?
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Why do the landing gears of Boeing 767 and certain Airbus aircraft tilt down? [duplicate]

I need help and some explanation on why are they sometimes tilted down instead of up.
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Why doesn't Boeing use supercritical airfoils?

It's my first question & I really want to know the answer from professionals to decide if my new design of airfoil is worth it because the initial test by CFD software (Fluent-ANSYS) indicate that ...
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Is it possible to continue flying without electric power? [duplicate]

To be specific with the question, I would like to know if if it is possible to continue flying in the event of total loss of electrical power. Obviously, I know this entails the shutting down of ...
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Why does JetBlue have aircraft registered in Germany?

I recently saw a JetBlue A321 with a German flag on its tail and was wondering why it would be registered in Germany if it was a US-based carrier. I was thinking maybe it had something to do with ...
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Does Airbus buy Boeings and vice versa?

I read somewhere that Airbus developed the A350 in response to the B787. In general, how much do Boeing and Airbus know about each other's aircraft? And how do they learn about the detailed designs of ...
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11 votes
3 answers
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Do pilots use the pedals in flight on planes with a sidestick (Airbus)?

Do the pilots flying sidestick aircraft with fly-by-wire control systems, such as the Airbus A320, use the rudder pedals while in the air? Or does sidestick input affect both the rudder and the ...
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Is there any difference between Airbus and Boeing on yaw damper technology?

Modern aircraft have yaw damper systems installed. Is there any difference between the two big manufacturers on yaw damper systems, such as the location, etc.? I have to do some research on this topic ...
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Are the A400M propellers rotating in the wrong way in "Mission Impossible: Rogue Nation"?

At the beginning of the movie Mission Impossible: Rogue Nation we can see an A400M taking off. When the engines start, the propellers turn in opposite directions. As I understand it this is not a ...
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2 votes
1 answer
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What is the difference between an Airbus A330-200 and an A330-243?

I am just curious to know the difference between Airbus A330-200 and A330-243. Sri Lankan Airline A330-243 Sri Lankan Airline A330-200
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Flex temperature isn't actually "fooling" the FADEC, right?

I'll be using Airbus terminology here because that's what I know, but I guess the concepts are universally applicable. The way I understand flex temperature is: It's a user interface for pilots to ...
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How do Airbus and Boeing aircraft handle Dutch roll?

I have some homework about Dutch roll filters. Dutch roll is something that is corrected by yaw damper systems, but I would like to know the different ways Boeing and Airbus deal with the issue of ...
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3 votes
1 answer
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Why are some A350s missing SSA probes on their nose?

I recently just noticed that some A350s are missing their iconic set of 3 main SSAs (Side Slip Angle Probes) on their nose. I'm not sure if its an issue of newer variants or varied airline options, ...
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8 votes
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What is the yellow marking underneath Delta A220 doors?

I've recently noticed a yellow marking underneath the left door of Delta A220s. It's a yellow rectangle with a black T on it and it is exclusive to Delta and no other airlines on the A220. Any ideas ...
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Why does the auto brake panel on an A320 use "lo", rather than "low"?

Is there a specific reason that Airbus chose to shorten "LOW" to "LO" for the lowest autobrake setting? Wouldn't it be more consistent to use three letters for each setting?
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7 votes
1 answer
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Was there more than one incident or accident where an Airbus FBW aircraft reverted to mechanical backup?

There was an accident Smartlynx A320 training flights MYX-9001 at Tallinn on Feb 28th 2018, where ELAC pitch control failed due to fault in the stabilizer actuator, and then both SECs failed due to ...
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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 ...
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How big is the TP400-D6 turboprop installed on the A400M?

I am trying to re-create the A400M TP400-D6 engine in CAD, mainly the nacelle and propeller, yet I can't find any detailed dimensions for it. Europrop specifies a 0.92m diameter for the TP400-D6, so ...
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14 votes
1 answer
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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" ...
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is it mandatory you put a ground cable for airbus aircraft parked over night?

is it mandatory you put a ground cable for airbus aircraft parked over night
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Why does the A320 IR2 MEL OPS procedure suggest to switch to ADR3?

The A320 34-10-05B IR2 MEL OPS procedure additionally calls for Air Data switching to FO3. When ADR 2 is working fine why replace its data on the FO PFD when only IR data is lost?
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Does an Airbus FAP display any indication of a full waste tank?

I have doubt about controls on FAP regarding Waste Tank. I understand when crew person clicks on Input On button, FAP displays the quantity of Water and Waste tank. But what happens when Waste Tank ...
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For Airbus pilots, what is your TOD calculation methodology?

During A330 training, various instructors will have many different types of equations and gateways used to confirm the descent profile and whether or not they are above or below glidepath. The ...
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5 votes
1 answer
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What is the outer kink on the airbus 340-600?

I was checking some information about the a340-600 and got this statement: "thickness/ chord ratios 15.25 per cent at root, 11.27 per cent at inner kink, 9.86 per cent at outer kink and 10.60 per cent ...
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4 votes
1 answer
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What does 1FD2 mean?

On the EFIS of Airbus you can see 1FD2 on the autopilot section of the FMA. what does it mean?
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35 votes
1 answer
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What's that in front of the overhead panel?

There is that thing I have see a few pilot using it. it can be pulled outside and then inside. what's that and what's the use of it?
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There is any technical reason for the new Airbus shades? [duplicate]

There is any technical reason for the new Airbus shades? Or they exists just because it is sexy?
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26 votes
3 answers
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How many flight hours do the first retiring A380s have?

I read news here that an A380 previously owned by Singapore Airlines has been decommissioned and scrapped. Another A380 from Air France was also retired. Others are nearing retirement as well. But it ...
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1 vote
1 answer
635 views

Which Inlet Barrier Filter (IBF) is used in Airbus H145?

Inlet barrier filter (IBF) is an optional equipment in H145 / MBB-BK 117 / EC145 helicopters, which company Inlet Barrier Filters are used on them Donaldson, Aerometals etc.. The H145 Helionix / ...
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Why do Boeing planes have more flap settings than Airbus planes? [duplicate]

The Boeing 737 and Airbus A320 are similar in size and performance. They are direct competitors. Boeing seems to have eight flap settings (1, 2, 5, 10, 15, 25, 30, 40) whereas Airbus seems to have ...
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7 votes
2 answers
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What does "speed checked" mean?

Here is a Scenario: PF: Flaps one. PM: Speed Checked, Flaps one. What does that mean and why do they have to say "speed checked" every time?
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What does pre/post modification mean in Airbus MPD?

What is the difference between POST MOD (with partial mod i.e SXXXX) and PRE MOD (with partial mod) in the applicability column of an Airbus MPD (Maintenance Planning Document)?
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2 votes
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What are these things on the A350's instrument panel?

https://imgur.com/a/BF2Ghpv . . On the FCU Panel, there are some buttons or switches that are not on a320s and some older Airbuses except the A380. what's that and what the function?
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Can autopilot navigate automatically?

When the pilots enter their flight plan into the FMGS, the route will be shown on the ND. Can the autopilot automatically turn when needed with the given plan, or the pilots have to manually adjust ...
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On Airbus aircraft, can the pilot control the aircraft when the autopilot is active?

I am looking at the schematics of computerized control for Aibus aircraft and I do not understand the relation between the various control law and the autopilot. Under "normal law" can the pilot ...
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5 votes
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Why are the engines of the Airbus A400M slightly tilted down?

Picture: Youtube. Firstly, are the engines really tilted down? I have tried to check another picture over the net, seems they are really tilted down slightly. But need confirmation from you experts, ...
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