Questions tagged [feature-identification]

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

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9
votes
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
255 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
votes
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
votes
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
votes
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)
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
votes
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
827 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
43
votes
2answers
24k 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
57
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?