Questions tagged [feature-identification]

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

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What are the bulges (with what look like air intakes) on the lower fuselage of the An-22?

On both side of the lower fuselage of the AN-22 there are long bulges. While the undercarriage doors are visible, they only account for a small proportion of the length, making me doubt they're just ...
Chris H's user avatar
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3 votes
0 answers
116 views

What is the protruding element on the vertical tail of this Airbus Zero E concept?

The TurboFan concept of Airbus Zero E has a protruding element on the top of its vertical tail, see the image below. Image source Zoomed image Only this variant of the Zero E has it, is it related ...
ROIMaison's user avatar
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19 votes
3 answers
10k views

What is this little "rod" thing on the back of the F-22 for?

I was curious what this little extra surface on the back of the F-22 is for. I can't see any use of it protruding past the engine nozzles, so what is it for? Also, does the structure have any problems ...
Wyatt's user avatar
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4 votes
1 answer
176 views

What are these two sticks on chart holders?

Many different airplanes feature two small sticks on both sides of chart holders. These can be moved within a limited range. I've heard different versions about their use and haven't found any ...
Miguel Hernández's user avatar
2 votes
0 answers
133 views

What is this thing sticking out under the F-22 Raptor's fuselage? [duplicate]

I was looking through some pictures I took of the Lockheed Martin F-22 Raptor performing a demo flight at Oshkosh 2023 and I noticed this thing sticking out from the bottom of the Raptor's fuselage. ...
M66's user avatar
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6 votes
1 answer
273 views

What is this component below the fuselage of the Fokker F28 used for?

There is a long straight component with three attachment points below the fuselage of the Fokker F28 Fellowship: (image modified from Wikimedia) It looks like it is installed on both sides of the ...
Bianfable's user avatar
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1 vote
1 answer
169 views

PZL M28 Skytruck exhaust alignment

Watching a short documentary on PZL M28 Skytruck, I noticed it has quite oddly aligned exhaust pipes. They point almost directly downwards, with only slight aft tilt: Picture credit: Łukasz Golowanow ...
Jpe61's user avatar
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3 votes
1 answer
226 views

Manual or other information regarding Kollsman Instruments B40331-10-276 altimeter

I just purchased a used altimeter from eBay because it'll look pretty on a shelf, and I may add a computer interface to it. However, I need help finding information on it. This (from what I've been ...
Steve's user avatar
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6 votes
1 answer
1k views

What is this tank on the wheel of a Westland Wessex HAS31B?

What is this tank on the wheel of a Westland Wessex HAS31B? I'm talking about the white tank on the left of the picture. Photo taken in Darwin aviation museum, own work, public domain.
Antzi's user avatar
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10 votes
1 answer
4k views

Why is this screw on the wing of DASH-8 Q400 sticking out, is it safe?

Was flying with the Dash-8 Q400 and saw the screw sticking out? It's on the wing near the wheel compartment as shown in the picture. Even if safe, it doesn't look pleasant to the passenger. Are loose ...
Eugen Sunic's user avatar
5 votes
1 answer
2k views

What is this probe on the Airbus A330 engine nacelle?

What is the purpose of the little probe seen under the A330neo?
Boeing787's user avatar
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5 votes
1 answer
195 views

What is this missile extended beneath an F-104 Starfighter?

On a video posted on YouTube there is a short clip of some sort of rocket-powered device - presumably a missile - extended beneath an F-104 on a mechanical sling. It must have been lowered into ...
Party Ark's user avatar
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2 votes
0 answers
73 views

What is this thing apparently attached to the bottom of this Caravelle's engine, and why is it there?

This Caravelle 10B appears to have something mounted on, or stuck to, the lower surface of its No. 2 engine nacelle. (Image originally by clipperarctic at Flickr, via Russavia at Wikimedia Commons; ...
Vikki's user avatar
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7 votes
2 answers
2k views

What is this hole at the bottom of the DA40NG body?

This is the bottom of the fuselage of a DA40NG aircraft and where the right wing attaches to the fuselage. What is the thing I'm pointing at with the red arrow in the picture? As it is written in the ...
pilot162's user avatar
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4 votes
1 answer
1k views

What is name of this part on a helicopter?

What is name of this highlighted part of helicopter and what is its use?
Vikas Singh's user avatar
4 votes
2 answers
617 views

What does this handle from the movie Flight (2012) do?

I wanted to ask about something that, as an aviation enthusiast I have never seen before, from the movie Flight with Denzel Washington. Perhaps the reason is is because it's a movie. You pull these ...
QMan2488's user avatar
  • 253
1 vote
0 answers
84 views

What is this aircraft-like object at Sea-Tac Airport? [duplicate]

Looking at the Seattle-Tacoma International Airport on Google maps, I noticed at 47°27'47.8"N 122°18'15.5"W something that looks like a jet aircraft, but with folded wings and a tiny ...
cjs's user avatar
  • 1,044
2 votes
1 answer
292 views

What is the purpose of this box behind the yoke on a 737?

I was looking at the 737 cockpit when I found this apparatus behind the yoke. I have never seen it before and I have no idea what is does. Can anyone help me?
Israel O. Emmanuel's user avatar
9 votes
1 answer
729 views

Why is the forward fairing of the pylon very shiny and metallic in appearance in A350?

One can notice the forward fairing of pylon is very shiny and metallic. This is quite unique and I do not find it in other aircraft. Why is this? Does it serve any specific aerodynamic purpose or does ...
karthikeyan's user avatar
6 votes
1 answer
2k views

What is this nose projection on the Tupolev Tu-95?

The Tupolev Tu-95 has this long and quite substantial appearing projection from it's nose just under the cockpit windscreen: What is this? I initially though this might be a cannon but being a heavy ...
jwh20's user avatar
  • 183
2 votes
1 answer
274 views

Is this electrical socket found in aircraft?

I work for a a Public Utility in IT Asset Management, and we have been buying these auto air adapters (Dell's description) from Dell for our field workers. Each one comes with an adapter that goes ...
Davidw's user avatar
  • 867
6 votes
1 answer
417 views

What are those pylon looking things on the rear of this DC-8 wing?

(image source: airliners.net) What are those humps on the rear of the wing? Are they external fuel tanks?
Boeing787's user avatar
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13 votes
1 answer
5k views

What is this Beechcraft bonanza A36 wing feature?

can someone explain what is this thing on leading edge of bonanza A36 aircraft. Thanks
Filip Adam's user avatar
12 votes
2 answers
2k views

What does this 'R' number mean on the ND of this Airbus?

This number here, what does it mean?
Cherona's user avatar
  • 222
15 votes
1 answer
546 views

What is the round tube mounted on the roof just behind the windshield of a PC-6?

If you look at the below image: (image source: Wikimedia Commons) There are three "antennas" mounted on the forward portion of the cabin roof. The two rear, wing-shaped ones probably are ...
TheEagle's user avatar
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8 votes
2 answers
1k views

What are those white things on the windshields of most Citation jets?

What are those white things on the windshield of most citation jets? Does it have to do with rain?
Boeing787's user avatar
  • 6,384
2 votes
0 answers
92 views

What are the twin "air data booms" on the Su-22? [duplicate]

The Su-22 has two protruding "probes" at the nose. What are they? Air data probes (why two?)? Antennas? https://www.airliners.net/photo/Libya---Air/Sukhoi-Su-22M3/1615286/L
filo's user avatar
  • 121
4 votes
1 answer
792 views

Can someone tell me what is this on the overhead panel of the Boeing 777?

I found this on the Boeing 777 and it was on the Captain's side behind the speaker.
Avi's user avatar
  • 105
14 votes
2 answers
2k views

What are the reflective structures above and to the rear of the engines on a VC-25?

In this video at 7:04 we see the following view of a VC-25 (an aircraft frequently known as "Air Force One"): What are the two shiny, gold-coloured structures above and to the rear of the ...
cjs's user avatar
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6 votes
1 answer
961 views

What does this black lever next to the overhead panel on the Airbus 320 do?

What does this do? It's located next to the overhead panel of an A320 cockpit.
Avi's user avatar
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11 votes
1 answer
1k views

What is the piston/leg on the aft wall of the L-1011?

In this response to the APU location on an L-1011, in this image, there appears to be a large piston or leg extended downward along the centerline from the aft wall: Modified: By Reedy (Own work) [CC ...
Ian W's user avatar
  • 295
2 votes
1 answer
669 views

What is the green arrow on the 777's airspeed tape? Does it exist on other types as well?

Image source: fsnews.eu I found this green arrow on the primary flight display (PFD) of a 777. What does it show? I'm assuming it's for showing acceleration and deceleration but I am not too sure. Is ...
Aviation Enthusiast's user avatar
15 votes
1 answer
6k views

What does the "High Alt Landing" guarded push button on the A320 exactly do?

I am aware that not all variants of the A320 are equipped with the HIGH ALT LANDING guarded push button. I know that it is pushed before landing at high altitude airfields. Was wondering what it does ...
Tap's user avatar
  • 153
4 votes
1 answer
666 views

What is this jutting structure in the tail section called and what is its function?

I was wondering if there is a name for this particular structure on Su-27 and F-22 and if they serve any function?
curiouslurker's user avatar
24 votes
4 answers
4k views

Why do most ARFF trucks tend to be so angular?

玄史生, CC0, via Wikimedia Commons I've been looking at various types of ARFF (aircraft rescue and firefighting) apparatus, and while some rapid-response vehicles do appear to be more conventional, most ...
MD88Fan's user avatar
  • 2,484
-1 votes
2 answers
202 views

What’s this on the J-10 fighter? [duplicate]

What's this on the J-10 fighter? Source: wikimedia.org
TayE's user avatar
  • 6,605
15 votes
5 answers
7k views

Why do propeller driven planes have intakes/inlets, such as this one on the P-51 Mustang?

Specifically talking about the p51, why do they have intakes? Don't propeller-driven planes not require any sort of intake because the propeller is what propels it by pushing air behind it?
Mahmoud Salaheddine's user avatar
1 vote
3 answers
266 views

How does this instrument in a DA20 measure flight time?

Could you please explain how this counter works (in the picture)? I thought that it starts with propeller (so propeller starts moving so this counter), but seems it registers the pure flight - from ...
Sergey's user avatar
  • 101
15 votes
1 answer
3k views

What are these paint patches on this 787-8?

What are these paint patches on this British Airways 787-8 (G-ZBJB)?
TayE's user avatar
  • 6,605
5 votes
1 answer
492 views

Drain line under drag chute door of F-4 phantom

What is this drain line under the drag chute door on the F-4?
baney's user avatar
  • 81
8 votes
1 answer
963 views

What are these white drops on the exhaust plug of a CFM56-7B engine?

Does anybody know what those white dried-up drops are? I checked out another Boeing 737-800 on the ramp and it also had the same defect so I'm guessing this is a common issue, or is it? This shows up ...
Luis's user avatar
  • 81
4 votes
1 answer
347 views

What is the tapered cone on the B747 CF6 engine inlet cowling?

B747 and B767s are supposed to be using exact same GE CF6 engine, and as such their components are interchangeable including inlet cowl as they show to be effective in the IPC. However some of the 747 ...
method's user avatar
  • 143
12 votes
1 answer
2k views

What are these SR-71 "Ports" for?

In this video at the 2:40 minute mark there is a relatively clear image of the rear of a Blackbird. This is a new view - at least for me. Are those "ports" and, if so, what are they venting?...
Roger's user avatar
  • 121
10 votes
2 answers
626 views

What is this unit above the autopilot panel in Boeing test aircraft?

I keep seeing this (more here and here) unit (maybe solely) in Boeing test airplane cockpits above the autopilot panel. Can someone tell me what is this and what the purpose of this big unit? Based on ...
Bela Vizer's user avatar
2 votes
1 answer
169 views

Is the fuselage of the CEA 311 Anequim configured as elliptical?

I am currently studying the effects of reduced drag induced by laminar flow on the subsonic aircraft. In order to complete that, I have believed I found the optimal fuselage which has the best ...
Roberto Sprat's user avatar
1 vote
1 answer
197 views

What are those polygons on the Garmin avionics navigation display?

I'm not pilot yet, just an enthusiast having some fun in MSFS2020. What do those colored lines mean in Garmin avionics?
Douglas Ferreira's user avatar
4 votes
1 answer
308 views

Why is there an intake in front of the landing gear on this C-160?

I went to a aircraft museum and saw this C-160, it has intake in front of the landing gear which is now blocked with the orange thing as you can see below in the picture below. Why is there an intake ...
Timothy Scherer's user avatar
7 votes
1 answer
493 views

What is this pilot doing before boarding his F-15?

In this video ... Fast takeoff of an F-15 Eagle from an air base in Iceland ... what is this one thing the pilot does on arrival, before climbing the ladder? It looks like he's putting something, ...
ChrisW's user avatar
  • 3,094
2 votes
0 answers
192 views

Can anyone help identify this turbine blade?

At the local army/navy surplus store and found this in a "junk" box. Got it for $1. Would live to know what airframe this came off of. Im new to this so compressor blade? Compressor turbine? ...
Josh's user avatar
  • 21
40 votes
1 answer
9k views

What is the meaning of these stencils, usually found on military planes?

I am wondering what these markings (which I found both in the French Super Etendard and in the British Tornado) indicate? They may be something relevant for the maintenance crews.
Marcello Rosa's user avatar

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