# All Questions

21,645 questions
Filter by
Sorted by
Tagged with
16 views

### If you are able correct your vision in one eye, must you correct your vision?

At 5 years old (30 years ago) I had an accident and my right eye's lens needed to be removed. I struggled with glasses and contacts in and off for about 15 years but they always end up too ...
15 views

### Gain Extra force from Weight in Slopped Runway

No doubt that skiing sports is great especialy when your weight is the main force which speed up your motion in snow. I was asking myself, why we don't use the same concept for huge planes & ...
11 views

### Explain the internal parts of the Magnix Axial Flux Motor and why they have used more than one motor drive for electric plane?

Explain Magnix Axial Flux Motor is composed of 'one rotor and two stators' or 'two rotors and one stator' and why they have used more than one Magnidrive 100 to drive only one motor as one drive could ...
13 views

### OBPMA equipment for RNP

I want to find any standards for OBPMA equipment required for RNP operations. I read RNP NavSpecs and ICAO standards, but I can't find any information on them. As stated in aviation textbooks, ABAS - ...
30 views

### Optimization of bucket target type thrust reverser

How to optimize the bucket target type thrust reverser mechanism ?
53 views

### What’s nvca at the end of f135 engine?

What’s nvca at the end of f135 engine? And What does it do?
656 views

### What kind of altimeter are used in modern airliners?

What's the mechanism of the the altimeters in big jets?
30 views

### how will CAS respond if temperature increases by 5 degrees when flying at a constant indicated mach number at fl 290

how will cas respond if tmeperature increaeses by 5 degrees cw hen flying at a constant indicated mach number at fl 290
43 views

### Display format of EICAS/ECAM [closed]

depth on the display format of EICAS/ECAM and how they differ from each other?
75 views

### How to calculate runway length required for an A380 to takeoff?

I was wondering, how much runway length does an Airbus A380 require to takeoff? I saw other answers on Aviation S.E. but I didn't find how to calculate it to (I am curious to know how to calculate it)....
68 views

### Once pressure distribution is established, why soft wing at zero AoA without battens can't maintain shape?

Imagine we have soft wing with curved battens installed in wind tunnel set at zero AoA.Wing has camber,so it produce lift. If we remove battens from wing during wind tunnel test when wing produce lift,...
101 views

### Does throttle equal power on a turbocharged piston engine?

On a normal piston engine powered airplane, throttle equals power. If I set the throttle to 50 %, I will get 50 % of the power the engine can develop at the current altitude, temperature, etc. In a ...
908 views

### Can a wing be stalled at a speed larger than its stall speed?

I was told pulling the yoke quickly and all the way back stalls the plane immediately. I believe this is not possible as long as this occurs above the stall speed. I think about a styrofoam plane: ...
22 views

### What would be VSI indications of an aircraft sideslipping to a blocked static vent while descending?

The aircraft has two static vents, each on left and right side of fuselage. Left static port is blocked and aircraft is sideslipping to left at an INCREASING rate while descending. Would VSI overread ...
90 views

### How can speed brakes level a plane?

I copy pasted YouTube's transcript at 2 minutes and 22 seconds. Sweeney refers to then Major Kevin Sweeney, retired as Lt. Col. NARRATOR: Speed breaks are devices on airplane wings designed to ...
116 views

### 1. Do commercial airliners turn off vents during boarding? 2. To save money?

BugsArePeopleToo comments on Scientists call for travel ‘code red’ over Covid variant found in southern Africa But airplanes are still turning off their vents during the boarding process, to save ...
78 views

### Why did KJFK keep using runways 22R/L here instead of switching to 13R/L?

In this YouTube video, one can see the arrival at KJFK, holding patterns, and eventual diversion to KPHL of LH400, an A380. When LH400 arrives in the New York area, the pilots request the use of ...
23 views

### EASA PPL theory instrumental approaches rules

I am learning for EASA PPL in Czech. I noticed that in some of the books there is chapters about Instrumental Approaches Air Law rules. For example - ILS approaches Parallel approaches Simple ...
38 views

### Differences between CPL and PPL theories

I am learning now for EASA PPL exams in Czech. I tried to find some question bank applications, and I found AviationExam app which looks very good. the problem is that there is no PPL section in ...
231 views

### Does the radial needle of a HSI automatically deflect to the correct position when tuning the NAV radio to a localizer / ILS?

At least on small aircraft, the HSI is slaved to the NAV1 radio. The NAV1 radial is selected with a small knob of the HSI. Now, when I want to fly an ILS approach I don't need to set a radial myself ...
55 views

### How can I calculate 'Max aircraft Load Factor' and 'Max aircraft Speed' when flaps are fully extended on a civil aircraft?

I am trying to calculate the critical loading conditions for Flaps (in order use them inside my Finite Element Analysis to, determine if the Flaps will be able to bear these critical loads) during the ...
3k views

### Will computational fluid dynamics (CFD) ever be 100% correct?

CFD results never match real world numbers especially in turbulent 3D complex flow... What stops CFD being perfect, and will it ever be 100% correct? If the Navier-Stokes Millennium problem is solved, ...
51 views

### How does the flight controls performance differ in a compressible and in compressible environment?

I know that in low speed flight compressibility effect is negligible and in high speed there will be an effect but how do they differ in flight controls such as primary and secondary?
76 views

### Why does the centrifugal twisting force move variable pitch propellers to fine?

In my research on the forces acting on and influencing a single engine, non feathering variable pitch propeller's ability to change blade angle, I've come across a bit of a roadblock. Aerodynamic ...
69 views

### Where is the best place for a camera on airplane? [closed]

I am making a model plane and I need a good place for the camera. I think the tail is the best place, but please correct me if I am wrong Thanks
38 views

### Are TIBS and TWEB in Alaska discontinued?

My 2021 paper edition of FAR/AIM still mentions TIBS (7-1-8) as Alaska-Only, but when I look at the Alaska Chart Supplement I can't find any TIBS numbers. https://aeronav.faa.gov/Upload_313-d/...
248 views

### Has there ever been a two engine Air Carrier where both engines failed during the takeoff run resulting in an accident?

Has there ever been a two engine Air Carrier anywhere that has had both engines fail at some point during the takeoff run that resulted in an accident?
42 views

### On which point are the moment coefficients of the NACA airfoils measured? [duplicate]

On airfoiltools.com website, for example: NACA 2412, they give airfoil data. One of it is the moment coefficient of the airfoil vs the angle of attack of the airfoil. However, these moment data could ...
108 views

### What are the wake turbulence characteristics at ground level near landing aircraft?

I'm a structural engineer and I need to understand the additional forces that wake turbulence may cause on a building near a runway. I can determine the natural wind speed and associated forces on the ...
166 views

### What is the best way to determine wind correction angle?

As a new instrument student, I would like to know the best and efficient way to determine a rough wind correction angle. Calculating it with help of the e6b or other ways is often good to do before ...
47 views

### What would be the ASI readings incase of pitot leakage?

If there is a leak in the pitot tube in the a/c, what would be the readings for a pressurized and unpressurised aircraft? I've read that if there is leakage in pitot tube within the structure of a/c, ...
124 views

### Map with names of all active airports for Polar Routes?

Google yielded a map at https://nordregio.org/maps/airports-in-the-arctic-2019/, but it doesn't list any airport codes or names. Any that do? I am curious how many such airport can assist Polar Route ...
152 views

### What are these 3 stages of twilight?

The extreme left is Day and Extreme Right is Night. In between are those Civil twilight, Nautical and Astronomical Twilight ?
25 views

### Eta-J curves for MT propellers

I'm looking for eta-J curves for MT propellers, particularly the MTV-6-R/190-69 3-blade constant speed propeller and I cannot find it.
34 views

### How does pressure affect formation of clouds?

Relative Humidity is the key factor in determining cloud formation but i believe prevailing pressure system in the surrounding has to do with how fast the cloud can be formed and how long will it ...
5k views

### Minimum number of runways required for international airports?

What is the minimum number of runways required for an International Airport to be operational - commercial aviation? Would two runways suffice?
175 views

### Safer to stop over in Seattle or Vancouver, and avoid Polar Routes?

My mom works in New York. She survived an airplane crash when younger. Assume cost and travel time are no problems. She prefers paying HER own money and spending MORE time on a stop over flight in ...
162 views

### Does a diesel piston engine's power decrease more slowly with altitude than with an AVGAS engine?

I have a power-altitude curve of the Austro Engine AE-300 provided by manufacturer and I don't know the reason why power decrease lower than other engines. The curve is in the end of the pdf in this ...
226 views

### Are airports still required to have a rotating beacon?

In the age of computers (GPS) do newly built airports still have the rotating beacon?
66 views

### Is the principle of the force control stick used for other applications? [closed]

I have read some good answers here about the good ergonomics of a force controlled stick used in the cockpit of Aeroplanes. Do you know of other applications for this way of control? Furthermore I ...
57 views

### What is the speed the fan blade would go if it would separate from the shaft with the engine at full throttle?

I'm making a simulation of a blade separating from the shaft to test the case of the engine, but i don't know what speed should i put on the blade to go outwards the case, anyone has any idea how to ...
58 views

### Does TCAS II work and give RA with Mode C or Mode A transponders?

What's the minimum requirement for TCAS II RAs to be generated? Will we get RA if we have mode C transponder and the other aircraft also has mode C? Will mode A work as well?
134 views

### Air density decreases as temperature increases - but air also gets cooler as it expands; does this create a feedback loop? [closed]

First, I apologize for the sloppy title. I had a tough time phrasing this as a concise question. For a column of air at a given pressure, density decreases (the air expands) as temperature increases. ...
2k views

### Does the rule that alcohol on flights must be served by a flight attendant also apply to private flights?

Regarding the recent incidents and fines the FAA levied it said in the following release: "Federal law prohibits passengers from consuming alcohol aboard a flight that is not served by a flight ...
164 views

### Do you have to fly to an airport with an instructor before you can solo there?

I am currently doing my flight training and my CFI said that before I can fly solo to another airport he needs to fly with me there first. Is this true?
482 views

### Does aircraft manufacturers provide option to exchange older models?

Most of the vehicle manufacturers provide exchange value for older models when buying a newer one. Like you can exchange your old BMW 3 Series for new 3 Series or upgrade to 5 Series and so on. Is ...
3k views

### What if you have a double-engine failure after V1 but before VR?

Imagine an A320 on the runway, starting its take off roll. The PM calls out "$V_1$". Just a second after $V_1$ is called out, and before $V_R$, you encounter a double-engine failure (an A320 ...
47 views

### What is the best way to determine Run-in direction for parachute activity?

I am very new into flying skydivers. The aim is to get skydivers to a certain altitude usually 14000ft as quick as possible. They have to be dropped into a certain direction to compensate for wind. ...