Questions tagged [feature-identification]

For questions about identifying a feature or design on an aircraft.

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What are these vertical slats under the wings of the Be-200? [duplicate]

This is a photo of the Be-200, an amphibious aircraft, taking from a youtube video. I would like to know what are all those vertical slats underneath the wings? What is their purpose? To me they seem ...
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1answer
455 views

What is this in the window? [duplicate]

Every time I have flown and sat in a window seat, I have noticed this small tube at the base of the window. It looks like it might be either metal or a small air pocket, but I'm not sure. I've been ...
10
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1answer
5k views

What is the function of the protruding outlet on the Trent XWB?

Original by Bernd Sieker from Germany (Trent XWB) [CC BY-SA 2.0], via Wikimedia Commons Above is a photo of the Rolls-Royce Trent XWB highlighting the aft facing outlet in question. In a video for ...
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2answers
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What is the crank on the ceiling of this aircraft?

What is the crank the pilot is operating above his head? Also what type of aircraft is this? image source
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1answer
5k views

What is this device on the nose of a Bombardier Global 6000?

What is the circled object? (jetphotos.net)
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2answers
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What is this 'ball' in front of the cockpit of some fighters, e.g., an Su-57?

What is the lump/ball thing visible below and to the left of the canopy in this image of a PAK FA (which became the Sukhoi Su-57), and what is it for? It's also seen on other fighters. Image source
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2answers
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What are these two tail elements of the Avro RJ100?

What are these two tail-side elements of British Aerospace Avro RJ100 and what is their function: Photo source: Eric Verplanken, jetphotos.net.
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1answer
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What are these spinning discs next to the throttle of the Boeing P-8 Poseidon?

The source video can be found here and the GIF is from 0:21 onwards. What are those 2 spinning things next to the throttle ?
3
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1answer
832 views

What are these diagonal devices above the leading edge of the V-22 Osprey's wing?

The Osprey has some kind of aerodynamic devices sticking up along the top of the leading edge. This picture from the Wikipedia page of the wings rotated shows them against its silhouette:- Public ...
8
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1answer
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What is this display on the 737 Classic?

Source: YouTube I noticed that display (yellow circle) between the two CDUs. What is it for? It is not a default installation on the 737-3/4/500. It looks like a Navigation Display/MFD, but why have ...
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2answers
2k views

What is this tube-like thing protruding from under an A330's wing?

I took a flight for a business travel and I saw something new for me on the wing. I highlighted that part in a red circle in the picture below. The aircraft is an Airbus A330-200. What is it and its ...
14
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1answer
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What are those things on the B747 engine pylons?

I noticed some dots and lines on the Boeing 747 engine pylons. What are they? The above image is as seen in this video at 2:18.
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4answers
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What are these grilles in the passenger cabin of this 787?

Below the windows, ahead of the seat, there are small grilles. Look: Source: Airliners.net What are those for?
47
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1answer
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What is this hatch above the cockpit of a 747?

There is a little door on the upper deck above the cockpit: Source: Airliners.net, (modified to indicate location of hatch). What is that door? What is its purpose?
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1answer
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What is this object on an MD-11?

There is something above the engine on the tail of this MD-11: What is that? Source
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1answer
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What is this protrusion on the door?

There's something below the door on almost every commercial aircraft. What is inside that box? The protrusion can be seen from the interior of the aircraft. Source
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1answer
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What is this metal plate below the door?

What is this metal plate for? (source) You can also see it here: (source) Is found on many aircraft so what is that piece of metal right there?
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3answers
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What is this device below the door of a 737 (and other aircraft)?

The other day I made a question about the External Power Hatch. Now I would want to know what's that hole below the door.
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2answers
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What's this hole on the ATR-72?

There is a hole on the belly fairing circled in yellow. I guess is an air intake but I tried searching some info and couldn't find anything. Source
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1answer
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What are the tube shaped structures on the back of the fuselage of this 737?

A previous question asked what the little metal plates between the horizontal and vertical stabilizer were (they are vortex generators), however I am much more interested in what the gray tube shaped ...
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2answers
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What is this on top of the Air Force One?

Clarification: It wasn't Air Force One that visited Switzerland, it was the 747-200 E4 carrying Ashton Carter. Source What is this thing on top of the plane (In red circle): On other "Air Force One" ...
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1answer
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What are the circles/holes ahead of the wing of an MD-82?

In the picture below I noticed there are three circles or holes of some kind ahead of the wing, what are those? (airliners.net)
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1answer
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What is this device protruding from the rear of this 787?

While looking at the photos from this question I noticed a small protrusion from the side of the plane. You can see it in the photo: and in the diagram from l@aeroalias answer: In the diagram it ...
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3answers
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What are these holes in the engine inlet?

In the next picture can be seen within the housing, near the inlet:
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1answer
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What is this device they bring on board from the jet bridge when we park?

Every time I deplane a Virgin America A320, I notice that they grab something from the jet bridge, and stuff it between the jump seats. I haven't seen any other commercial airlines with things like ...
19
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1answer
11k 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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2answers
3k views

What is this thing between the engines on the F-14 Tomcat?

On the F-14 as you can see from a picture there is some exhaust like thing in between engines. What is this?
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1answer
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What are these parts on STOL/bush planes?

I've seen these (note the parts pointed to by the red arrows in the image) on the landing gear struts of Super Cubs and plenty of other STOL bush planes with large tundra tires. It looks like maybe ...
13
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1answer
3k views

What is the purpose of this helicopter fin antenna?

I'm an airplane guy, but I've got a quick helicopter question. I've seen a few helicopters with what seems to be a fin shaped antenna on the middle of the fuselage just above the windshield. I've also ...
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1answer
272 views

What is this feature on a Piaggio P.180? [duplicate]

(wikimedia.org) What is this feature on a Piaggio P.180? I believe it's called a dolphin tail, but why is it exactly there and what is it for and why don't all airplanes have this?
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2answers
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What are these boxes built into the tails of some fighters?

In looking at European-designed fighters of the 4th and 4.5th generation, I keep seeing a common design feature; a box-like structure built into the tail, often in the top half or third. Some examples:...
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1answer
6k views

What is this pattern on the windshield of aircraft?

The image is extracted from this Airbus A350 video (at 3m40s, when taking off) I circled in purple the strange pattern formed by few black straight lines. I'm quite puzzled as I have no idea of what ...
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2answers
9k views

What exactly are those openings in the bellies of many jetliners?

I have circled the areas (in yellow) under the belly of the 737. What exactly are those? (airliners.net)
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2answers
2k views

What are the flaps on the exhaust of military airplanes for?

I have been looking over some pictures of military airplanes, and I noticed that some of the more modern air planes have flaps on the exhaust I was wondering if anyone knew what the purpose of the ...
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2answers
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What is the use of saw-teeth present on the nacelle outlets of modern turbofans? [duplicate]

I've noticed that there are saw-teeth on modern jet engines such as the GEnx and the Rolls Royce Trent 1000. What is their purpose?
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1answer
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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?
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1answer
961 views

What is the metal plating on the back of the A-6 for?

What is the perforated metal plating on the back of the A-6/EA-6 for? Source: Wikipedia
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3answers
29k views

What is this flange on the engine?

Flying home from the Denver ComiCon, on a 737, I saw an angled flange on the engine. Could you describe its purpose? Photos by CGCampbell licensed CC0
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4answers
4k views

What is a 'Wing Loop Fault' on an A320 series Aircraft?

I was recently involved in a flight that had issues before take off. The plane was an Airbus 321. It was explained to me as being a "wing loop fault". The problem was that the ECAM messages were ...
59
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3answers
24k views

What are these things hanging off the trailing edge of the wing?

What are these things hanging off the trailing edge of the wing? I've seen them in almost all of the aircraft I've flown in, and can't remember if they're exclusively Boeing or Airbus.
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1answer
27k views

Why is there a hole in one of the layer of an airplane's windows?

On a commercial airliner, there is a hole in one of the layer of the passenger windows. See here: and here: Or in more detail: Can you explain the physical reasons for this design choice?
239
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4answers
148k views

What is the dark spot visible below the cockpit on A-10s?

On most A-10s I have seen, the area under the cockpit is darker than the rest of the plane. Is there a reason for this?

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