All Questions

Filter by
Sorted by
Tagged with
3 votes
2 answers
678 views

What if the onboard airspeed sensors fail? [closed]

I've a simple question regarding the rare case of the failure of all airspeed indicators (ASI) including the co-pilots's indicator. Say the airspeed indicators were to fail during rotation, what would ...
Aerospace_Nerd's user avatar
2 votes
1 answer
408 views

Why is this flight from Morocco to Saudi Arabia flying such a long detour?

I saw the following flight path for RAM2014 from Oujda to Medina by accident on Flightradar24. Why is it doing such a long detour to go to Medina?
LambertBatman's user avatar
0 votes
0 answers
27 views

In gld90 protocol what is t=0-4 in a traffic report message

In gld90 protocol what is t=0-4 in a traffic report message: t=0: ADS-B ICAO addresses t=1: TIS-B ICAO addresses t=2: ADS-B self-assigned addresses t=3: TIS-B track file id How likely is a name ...
codeMetis's user avatar
  • 121
11 votes
1 answer
2k views

What are those little pieces for on the C27J?

Here is a picture I took. You can see some pieces on the vertical stabilizer, but only on one side. I imagine this is for an aerodynamic purpose, but I am not sure. What do you think about its purpose?...
L'aviateur's user avatar
3 votes
0 answers
57 views

How will future NOTAM exchange world wide work with DigitalNOTAM?

As by my knowledge the world wide exchange of NOTAMs is based on the ICAO format within the AFTN - between all the ANSP, including as biggest the FAA(USA) and Eurocontrol(Europe). This is as well by ...
PaulEdison's user avatar
-1 votes
1 answer
83 views

What are the main subjects covered in an aerospace engineering degree course?

Suppose someone wanted to self-study by reading some of the main textbooks that are covered in an undergraduate degree on aerospace engineering. What are the main topics that are covered? (As ...
CaptainCodeman's user avatar
0 votes
0 answers
114 views

How are Airlines like WizzAir able to fly between Saudia and Italy

As stated in the title I'm looking to understand how an airline like WizzAir Malta can fly between Milan, Rome, and Vienna from Riyadh. Their AOC is from Malta, and the EU has no open skies agreement ...
Knathuul's user avatar
  • 225
-1 votes
5 answers
939 views

Why don't airliners use engines one behind another?

Why do airliners use the engines the way they currently do and not one behind another?? Would it not lead to better thrust and in case any one of the 2 engines placed together has to fail, the 2nd one ...
Sambhav Khandelwal's user avatar
0 votes
1 answer
151 views

What does the suffix "A“ mean on specific PW1100G(A) engines?

Some time ago I tried to find out what the difference between a PW1100G and a PW1100GA exactly is. I am asking this question here because there seems to be no information online that could be useful ...
dnblkj's user avatar
  • 21
3 votes
1 answer
138 views

Is this the right procedure to make your way to the door for an evacuation?

After watching this video of an evacuation training and the hilarious recreation of the youtuber on the second part of the video, I couldn't help but think about this seriously, it just doesn't look ...
Gabe's user avatar
  • 3,337
0 votes
1 answer
34 views

wave drag: Lift coefficient in Korn's Equation

I have been using the Korn equation: $$ M_c = \frac{0.95}{cos(\lambda)}-\frac{t/c}{cos(\lambda)^2}-\frac{C_L}{10cos(\lambda)^3}-\sqrt[3]{\frac{0.1}{80}} $$ to estimate the critical mach number of a ...
Alastair Wyllie's user avatar
2 votes
0 answers
63 views

Why B737 CFM56 engine sounds like heavy wind sound at Throttling up?

14:14 ~ 14:21 : Throttle Up (with heavy wind sound 14:22 ~ 14:23 : Engine reached certain %, and no heavy wind sound 14:23 ~ : Throttle Up (with heavy wind sound) I always wonder why only B737NG with ...
Embraer's user avatar
  • 29
6 votes
1 answer
225 views

How and when are cockpits cleaned?

It's well known that cleaning the cabin of an airliner in the short time it is on the ground can be a challenging task for the cleaning crew. But what about the best seats in the plane, the cockpits? ...
doppelfish's user avatar
1 vote
1 answer
192 views

F15 Startup Intake drop

So I’m aware that the F15 has intake Ramps that adjust to airspeed and AOA, in order to ensure that the airflow is entering the engine smoothly and not too fast. But why does the system drop the first ...
Boeing787's user avatar
  • 6,464
0 votes
1 answer
57 views

Questions regarding Non-precision Localiser approach (KSEE LOC-D Approach)

Scenario Say we are doing some practice approaches into KSEE on the LOC-D approach. We are just southwest of the field and ATC/CFII says to climb to 5500 direct to BARET, cross BARET 5500 cleared for ...
Trevor Miller's user avatar
2 votes
1 answer
191 views

Name of this part of jet engine inlet

I can't find any name of it. I see it on some gas turbines but not all of them. Edit: Found them, they are called struts.
Adam Dutkiewicz's user avatar
-4 votes
2 answers
104 views

In a straight and level flight if thrust is equal to drag how is aircraft moving forward?

If two forces are equal and acting in opposite direction should not the object remain stationary. Is there an excess thrust which actually pushes the aircraft forward ?
user75458's user avatar
1 vote
2 answers
179 views

How do fighter jets maintain control while wings are perpendicular to airflow direction?

In my understanding, a plane stays stable and "straight", largely because the control surfaces such as the tail fins keep it stable by applying force in the opposite direction of any ...
CaptainCodeman's user avatar
0 votes
1 answer
110 views

What can happen if everyone congregates at the back of a parked plane? [duplicate]

On a recent flight on an A320, after landing, when parked up at the gate, the cabin crew announced something along the lines of "Stairs will be at the front, please do not congregate at the back ...
Cloud's user avatar
  • 13.5k
0 votes
1 answer
65 views

Do Blended Wing Bodies produce more induced drag compared to a conventional tube and wing design? Does this affect its performance?

Blended wing bodies can produce more lift by its aerofoil configuration. It has been shown to produce up to a 30% decrease in fuel burn due to its additional lift, compared to a tube and wing plane. ...
E. Chao's user avatar
11 votes
2 answers
2k views

Are transponders sometimes referred to as ‘parrots’?

Looking at the A/FD for Anchorage Ted Stevens Intl (PANC), there are a couple of entries in in the airport remarks for a piece of onboard equipment called a ‘parrot’. I am not familiar with this ...
Romeo_4808N's user avatar
  • 74.1k
1 vote
4 answers
184 views

Can smaller wing area improve the aircraft experience during turbulence?

Amid the recent incident of Singapore Airlines flight 321, leaving one dead after a severe turbulence, I ask myself if having an aircraft with smaller total area, there is less turbulent air that ...
Gabe's user avatar
  • 3,337
1 vote
0 answers
164 views

Is there a relationship between thr increasing number of airliners flying over 11000 metres and the number of problematic air pocket events?

I saw many news about the death of a passenger on Singapore Airlines flight. They say that the accident was caused by a turbulence. But judging from the description of what happened I thought about an ...
FluidCode's user avatar
  • 111
2 votes
0 answers
71 views

Has the inceptor (control stick) ever been controlled via using CAN bus control?

The CAN bus is being used widely in the automotive industry, and some aircraft are using the CAN bus control. Is there any inceptor (control stick) or throttle that can be connected to the CAN?
Kanghoon's user avatar
9 votes
2 answers
2k views

How can I find the area situated under an airport traffic pattern?

For a given airport (general mix of traffic & runway setup/configuration), how can I determine/define which areas around the airport can expect to be situated under the traffic pattern for that ...
UnrecognizedFallingObject's user avatar
3 votes
0 answers
108 views

Did the FAA used to require pilots to have valid sectional for VFR cross country flights?

Did there used to be an FAR in the 1990ies that required VFR pilots to have in their possession a valid sectional for cross country flights? I seem to remember this rule from before 2000, but can't ...
Devil07's user avatar
  • 8,584
4 votes
3 answers
1k views

Can one tell if a craft is a lifting body or a flying wing just by looking at it?

Recent news that the "reusable lifting-body spaceplane" Dream Chaser has arrived at Kennedy Space Center and may launch in August launched led me to read Wikipedia's Lifting body which ...
uhoh's user avatar
  • 6,028
0 votes
1 answer
93 views

optimal loiter speed for an eVTOL air taxi

I'm not looking for a precise answer here, just a ballpark estimate of the optimal loiter speed for any model of eVTOL air taxi aircraft. In other words, if you just want to delay (kill time) in the ...
user36086's user avatar
-1 votes
1 answer
65 views

Can a shock in certain circumstances be at a lesser angle than the Mach cone?

(Excuse the drawing quality) What will happen if a shockwave has an angle less than that of the Mach cone? In this picture, the black line represents the Mach cone. The orange line represents the ...
Wyatt's user avatar
  • 2,676
1 vote
2 answers
139 views

FAF: Lightning Bolt vs Maltese Cross on approach plates?

Here is my understanding (please correct me if I am wrong): A maltese cross is a FAF indicated with a distance and lightning bolt is FAF indicated by interception of glide slope. Non precision ...
Steve's user avatar
  • 11
3 votes
2 answers
385 views

Illegal flying - does anyone ever ask to see your license?

This video tells the story of a pilot who, according to government records: [Committed] four counts of identity theft related to his use of the victim pilot’s passport and personally identifying ...
Cloud's user avatar
  • 13.5k
2 votes
1 answer
96 views

What's the differences and the risk of duplicates, between ADS-B and TIS-B addresses? (inc. ICAO and self-assigned options)

What is: ADS-B ICAO addresses TIS-B ICAO addresses ADS-B self-assigned addresses TIS-B track file id How likely is a name collision between the self-assigned address and track file id? How likely is ...
codeMetis's user avatar
  • 121
0 votes
1 answer
56 views

Does the flow turning amount change as you get further away from an object?

Will the flow turning amount change as you get further away from an object? This answer explains why shockwaves will extend past the body that made them (good starting point). This question is asking ...
Wyatt's user avatar
  • 2,676
0 votes
0 answers
98 views

What could have been done better in United Airlines Flight 232 when differential thrust was used?

In United Airlines Flight 232, on their DC-10, all hydraulic fluid and pressure was lost on all three systems, simultaneously. Fitch, who was a training check airman on the DC-10 was on board and ...
AlphaCentauri's user avatar
0 votes
0 answers
242 views

Is it plausible that helicopters are safer than cars?

For some reason there is a lot of talk on helicopter safety online at the moment, and one fact that keeps coming up is "helicopters are safer than cars", supported by this article "Are ...
User65535's user avatar
  • 309
4 votes
4 answers
1k views

Why the combustion chambers of a turbine engine aren't used to spin the compressor like a firework wheel?

I searched here in this stack and the only question I found was this one, but I feel like it wasn't very well worded and it is also considered a duplicate. If this question is considered a duplicate ...
mandiokai's user avatar
  • 620
33 votes
1 answer
5k views

Will the NTSB be involved in the investigation of the crash that killed the President of Iran?

On 19 May 2024, the President of Iran died following the crash of a Bell helicopter, originally built in America. My understanding is that following the crash of an aircraft, the international ...
nick012000's user avatar
0 votes
1 answer
125 views

How wide should taxiways be to serve a A350?

I'm planning a model airport and I really don't know how far the wing should be from the gate safety line (I think that's what it is called). The largest wingspan will be that of an A350.
Eitan's user avatar
  • 11
0 votes
1 answer
83 views

Lift without aerofoil? [duplicate]

I have seen some RC planes flying without any form of airfoil, the wing is literally a flat board. What I want to understand is how lift is generated under these conditions. I understand kinetic ...
FourierFlux's user avatar
1 vote
1 answer
81 views

Why does the angle of a shock change when the flow leaves the influence area of an object?

In this (great) answer, it says: "far enough" from the Concorde's nose, the path followed by the airflow is not affected by its presence and it's just a straight line. Close to the nose we ...
Wyatt's user avatar
  • 2,676
1 vote
0 answers
18 views

Input Parameters for Combustion Chamber

I am doing a column breakup study. But for a better study I need air velocity, turbulence intensity (not primarily needed though),temperature, pressure and same parameter for injected liquid fuel. I ...
J. Brown's user avatar
3 votes
1 answer
86 views

Legal Requirement to reweigh aircraft?

For part 91 operations or regular trainer aircraft, what is the "LEGAL" requirement for which an aircraft re-weigh is required? The ONLY thing I can find on the internet is in the W/B ...
CoffeePilot's user avatar
5 votes
2 answers
4k views

Image recognition in air to air missiles

Given advancements in machine vision, what issues would there be if air to air missile guidance used image recognition (at least in the terminal phase) to defeat flares and chaff?
Peter's user avatar
  • 281
0 votes
2 answers
134 views

Is 200FPNM required up to the MSA or to the MOCA in the PLMTO3 SID

On the PLMTO3 SID out of KCHS, Rwy 15 has standard takeoff mins. From the AIM 5-2-9.e.1. Unless specified otherwise, required obstacle clearance for all departures, including diverse, is based on the ...
Name's user avatar
  • 914
-1 votes
1 answer
108 views

Do other countries aside from Israel have some special requirements on wearing seatbelt upon approaching destination but before the aircraft descent?

I read (mirror) that Israel has enhanced security procedures resulting in airplane passengers having to wear seatbelt up to 180 nautical miles before the destination: ISRAEL - TEL AVIV FIR — ...
Franck Dernoncourt's user avatar
2 votes
2 answers
116 views

Whats the derivation of a low speed ratio for stall warning?

I've seen an equation related to stall and angle of attack in a few places like this patent that goes more or less: $$ \frac{CAS_{alert}}{CAS_{current}} = \sqrt{\frac{C_{L,current}}{C_{L,alert}}} $$ ...
RealAnswersNotAI's user avatar
2 votes
0 answers
74 views

Can a B-707 recover from a spin? [duplicate]

There was an incident in 1959 involving a Boeing 707 on a training flight near Paris, France where a badly executed MCA demo reportedly resulted in the plane entering a spin, had an engine torn off ...
Roy Smith's user avatar
  • 121
0 votes
1 answer
163 views

What does "ceo" stand for in Airbus A320ceo?

What does "ceo" stand for in Airbus A320ceo??
Sambhav Khandelwal's user avatar
1 vote
0 answers
75 views

ADS-L Protocol implementation

I am trying to implement the ADS-L protocol in my application, but I did not fully understand it yet. Data link layer (page 13): Why CRC is at offset (Packet Length +1)Bytes if the CRC is included in ...
Murmi's user avatar
  • 11
0 votes
1 answer
183 views

Why military parachute backpack stays with the aircraft?

As seen on this youtube video where military personnel jumps while the backpack stays attached to the aircraft, why is that? what is the purpose of it compared to the other non military skydiving ...
Gabe's user avatar
  • 3,337

15 30 50 per page