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6 votes
2 answers
4k views

Is this the correct sequence of steps to convert from true course to compass heading?

I wanted to confirm my understanding of VFR Flight Planning/Dead Reckoning with relation to heading and course calculation. Is the below correct? Using a plotter, draw a line from departure airport ...
10 votes
1 answer
1k 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?...
0 votes
0 answers
14 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 ...
6 votes
1 answer
226 views

Effect of leading edge contamination wing performance

When a wing accumulates irregularities such as insects or dirt on the leading edge, its performance decreases. There are two main effects of this which are explained in https://aviation.stackexchange....
0 votes
1 answer
82 views

Range, Endurance and Fuel Cost Savings of an Aircraft

I have recently carried out CFD simulations on the A320 fuselage and modified its fuselage. I did this by matching the Reynold's number of the cruising altitude. The reference values were taken at ...
4 votes
1 answer
883 views

Can weight reduce a plane's glide ratio?

The FAA says glide ratio doesn't change, regardless of weight, here on page 5-7. Glide ratio is not affected by weight because, while a heavier glider sinks faster, it does so at a greater airspeed. ...
0 votes
5 answers
735 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 ...
2 votes
1 answer
85 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 ...
0 votes
1 answer
111 views

On the Boeing 737 ND display what does terrain value indicate?

On the Boeing 737 ND display what does terrain value indicate? (e.g. Terr 0016 0032)
-1 votes
1 answer
60 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 ...
3 votes
0 answers
33 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 ...
16 votes
3 answers
8k views

What happens in a stall during a slip?

In flight training we're warned against skidding turns since they have a higher potential for a stall/spin (the classic example being the stall/spin on the base to final turn). However, how does the ...
0 votes
0 answers
84 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 ...
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 ...
-1 votes
0 answers
52 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 ...
2 votes
1 answer
97 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 ...
-2 votes
1 answer
111 views

Safety of unpressurized 9000 foot elevation 6 months after mild heart attack? [closed]

For clarity and context this is not a health or medical question, nor am I asking for permission or medical advice. Rather I would like context and information and to draw upon the experience of this ...
0 votes
0 answers
110 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 ...
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 ...
2 votes
1 answer
153 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.
0 votes
1 answer
89 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 ...
-4 votes
2 answers
86 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 ?
0 votes
1 answer
18 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 ...
3 votes
0 answers
49 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 ...
-1 votes
1 answer
97 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 — ...
12 votes
6 answers
5k views

Why aren't aircraft built with carbon fiber tubes?

Though carbon fiber is more expensive than aluminum as a base material, one of its biggest costs is creating the final composite parts made of carbon fiber (molding, layering, resin, curing, baking, ...
1 vote
2 answers
147 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 ...
0 votes
1 answer
55 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. ...
1 vote
2 answers
94 views

At what Reynolds Number does laminair airfoils stop working as expected?

I was watching a RC Plane builder on YouTube create an airliner on a 3D printer and noted he used the scale laminar airfoil of a B-727. It seems to me that laminar airfoils don't work at the scale of ...
0 votes
1 answer
37 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 ...
1 vote
1 answer
72 views

What are all the ways that wind velocity can affect a paraglider/ canopy before it touches the ground?

Let's assume that a "perfect" humanoid robot flying a ram air parafoil (paraglider or canopy) performs some maneuver for landing exactly the same way multiple times. The only difference ...
4 votes
0 answers
68 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? ...
2 votes
4 answers
141 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 asked myself if having an aircraft with smaller total area, there is less turbulent air mass ...
17 votes
2 answers
3k views

Is collaring a circuit breaker considered deactivation by the FAA?

Let's say you discover that your landing light is inoperable during the preflight. Your aircraft doesn't have a MEL, so you follow 14 CFR §91.213(d). Assuming you do everything else required (placard, ...
0 votes
1 answer
39 views

Why would there be a drag discrepency when simulating transonic flow over scaled CRM geometry?

I have a discrepancy when simulating a wind tunnel experiment of a 2.7% scaled NASA CRM geometry as used in the wind tunnel. I am trying to replicate exactly the wind tunnel model and flow conditions ...
2 votes
2 answers
365 views

What is the most airliners shown flying together in a single photo?

I was re-visiting this question about a timelapse photo of multiple airliners and started wondering about the maximum number of jetliners that could be photographed together while flying. I have ...
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 ...
1 vote
2 answers
113 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 ...
1 vote
0 answers
143 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 ...
-2 votes
0 answers
75 views

Embraer 190 passenger seat [closed]

I would like to ask about the dimensions of the seats on the Embraer 190 aircraft. Additionally, a cross-sectional drawing would be very helpful. Thank you!
2 votes
0 answers
61 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?
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 ...
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 ...
3 votes
0 answers
66 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 ...
-1 votes
0 answers
38 views

Seat pitch for exit row on air india A320 Neo

I am flying BOM to Singapore on Air India. Plane is a A320 Neo. On the seat selection interface online, both rows 10 and 11 show as exit rows. However only row 11 shows as a premium XL ( extra leg ...
10 votes
1 answer
5k views

What's the minimum survivable mid-air collision altitude in a glider?

This weekend I had my first gliding experience in an ASK21. My first surprise was being given a parachute. The briefing was simple, if we have a mid air collision, unbuckle the belt harness, remove ...
5 votes
1 answer
102 views

Arinc 429: how to detect the data frame start?

I am designing an Arinc429 receiver based on a micro-controller with two interrupt inputs served by a circuit converting the +/-10V standard signals into two separated 0-3.3V streams, respectively ...
4 votes
2 answers
683 views

Is Touring Motor Glider included in the term "aeroplanes"?

The EASA definition goes as follows: ‘Aeroplane’ means an engine-driven fixed-wing aircraft heavier than air, that is supported in flight by the dynamic reaction of the air against its wings. ‘...
0 votes
1 answer
85 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 ...
-2 votes
1 answer
51 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 ...

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