Questions tagged [feature-identification]

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

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31
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2answers
18k views

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" ...
13
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1answer
1k views

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)
15
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1answer
3k views

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 ...
8
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3answers
2k views

What are these holes in the engine inlet?

In the next picture can be seen within the housing, near the inlet:
21
votes
1answer
2k views

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 ...
13
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2answers
2k 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?
9
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1answer
1k views

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 ...
9
votes
1answer
2k 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 ...
1
vote
1answer
258 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?
31
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2answers
5k views

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:...
27
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1answer
5k views

What is this pattern on the A350 front window?

The image is extracted from this 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 it is or ...
15
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2answers
7k 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)
13
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2answers
1k 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 ...
3
votes
2answers
2k views

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?
10
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1answer
2k views

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?
10
votes
1answer
834 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
45
votes
3answers
25k 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
59
votes
3answers
22k 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.
30
votes
1answer
25k 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?
230
votes
4answers
145k 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?