# All Questions

14,297 questions
130 views

### Is it reasonable for flight economy to correct banking tendencies with stick and rudder?

An aircraft with side-by-side seating but only one person aboard should fly banked. Banking decreases lift and more elevator is needed than in leveled flight which increases drag. Correcting the ...
376 views

### Can I still take the knowledge test with the US government shutdown?

Non-Essential employees at the FAA are out of work due to the US Government shutdown. I am nearing the end of my Private Pilot Training and am almost ready to take the Knowledge test. With the US ...
95 views

### How is the effect of wind on arrival time handled?

If a commercial plane encounters strong tailwinds, would the pilots set the autopilot for a fixed arrival time (if that is possible), or would it be ok to arrive way ahead of schedule? I imagine ...
35 views

### Does the HAL LCH have fly-by-wire?

Is Automatic Flight Control System (AFCS) the same as Fly-by-wire? If not what's the difference? India’s Hindustan Aeronautics Limited (HAL) has carried out the first flight of a Light Combat ...
33 views

### What is Temperture of VSI and limits of accurate value?

Within a temperature range of +50C and -20C the VSI is Accurate to within limits of : A)+- 200 ft/min B)+- 0 ft/min c)+- 75 ft/min D)+- 300 ft/min
61 views

### What is the most efficient symmetrical airfoil shape?

What is the most efficient symmetrical airfoil shape to make for a covering for a round upright bar that measures 40mm outside diameter? The speed of travel will be 25Kph and I also need a shape to ...
323 views

### Can a bird strike destroy the stealth capability of F-35?

There is a video according to which a F-35 aircraft has been struck by a bird in Israel. This, allegedly, disabled its stealth capability. More than a year earlier, two storks allegedly damaged ...
388 views

### What is this flyer in a 1911 short film?

In the very first instants of the 1911 comedy short film Robinet aviatore (or Tweedledum Aviator) by Michel Fabre, which can be watched here, on the background some kind of flyer can be seen. Does ...
6k views

### People in a rollercoaster or falling elevator feel the rapid descent, so why don't pilots in the cockpit?

Judging from the CVR transcript, the AF447 pilots didn't realize for most of the plunge that they were stalled and rapidly losing altitude. Why don't pilots in the cockpit get the same sensation of ...
188 views

### Identify an USAF transport aircraft in Greenland around 1960

Could anybody help me identify this aircraft? It was photographed in Greenland around 1960. Thanks in advance.
104 views

### How do engines cope with various intake airflow speeds?

On a recent trip out of Washington Dulles to San Francisco, our B777 met with 200+ mph headwinds (as per the passenger entertainment system) at 35,000 ft for the first half of the route, before ...
54 views

### Is there any evidence that the downwash vortices impact the performance of a wing?

Or is it merely flow separation on the upper surface towards the end of the wing? The assumption seems to be that the air "leaks" from under the wing to low pressure above with sufficient rapidity to ...
135 views

### What is the longest time after which plane crash survivors were rescued?

I found: Aviator Bob Gauchie detains the record for solo arctic survival by a downed airman, enduring 58 days of arctic weather before his rescue in Canada 1967. After 72 days on the glacier, 16 of ...
4k views

### What does an absolute novice need to learn to make a successful emergency landing?

Suppose I am a passenger in a small, non-commercial plane (e.g. at most 8 seats), and the pilot suddenly dies or is otherwise incapacitated mid-flight. Suppose further that nobody else on the plane ...
426 views

### How can a CFI renew their certificate with the FAA during the government shutdown?

My CFI certificate expires at the end of the month. I have completed the required Flight Instructor Renewal Course ("FIRC"), but when I called my local FSDO to make an appointment to submit my renewal ...
61 views

### Disadvantages of using thrust vectoring only in an aircraft with variable rotation nacelles such as the X-19

Take a quad tilt rotor aircraft such as the curtiss-wright X-19 or even a bi-tilt aircraft such as the V-22. What would be the advantages or disadvantages of using thrust vectoring only for control ...
75 views

### How does wind affect takeoff weight limits?

Two days ago I took off from BUR in relatively windy (although dry) conditions. Flightradar showed departure from runway 33, and winds were recorded roughly mid 20s kts from the N-NNE direction. ...
191 views

### What’s the setting range altimeters can handle?

What’s the setting range altimeters can handle? Is there a standard requiring a certain range for aircraft to be certified? Are there many occasions where a QNH is so high or low that airplanes have ...
55 views

### How to understand the requirements for IFR currency?

So the requirement reads "six instrument approaches; Holding procedures; and Intercepting and tracking courses through the use of navigation systems." I am still a little unclear on how to interpret ...
3k views

### Why didn't Boeing or Douglas make a jet airliner before the British DH Comet?

I was looking at the history of commercial aircraft and was wondering why UK-based De Havilland was the first to produce a jet powered airliner (the DH 106 Comet) when the US had a much bigger civil ...
60 views

### Is there a good online source on rotating detonating pulse engine?

I can't find a clear presentation that would explain the workings of a rotating pulse detonation engine graphically, only useless (to a layman) cfd simulations of the combustion chamber. Please share ...
42 views

### Aerodrome category, certification?

I need to know how you tell the certification of new airport just built? how can you tell if airport is certified for International flights or not? approved for intl flights or not meeting ...
2k views

### Who has more power? Air Force One PIC or ICAO or FAA? [duplicate]

So, ICAO(or FAA) Controls everything in the air, but is Air Force One on top of it, or does Air Force One need to follow the ICAO's (or FAA's) regulations?
100 views

### What is the difference between a business jet and a regional jet?

At first glance, business jets and regional jets seem virtually identical - both are small jets, usually low-winged twinjets (unless they're by Dassault, in which case they're trijets) with tail-...
53 views

### What are the dimensions of the A320's wingtip fences?

Does anyone know the size (relative to the wing) or have a schematic draw of these wingtip fences?
47 views

### Two flights sold as one non stop? [migrated]

I've purchased a flight ek109 that states on my ticket has no stop, yet on closer inspection actually flies DBX, Larnaca, Malta. What's up with that? Do I get off in Larnaca? Thx
57 views

### How can I correct an expected climb rate for density altitude?

If a flight manual (for a naturally aspirated piston engine plane) gives a figure for a best climb rate at standard temperature and pressure, is there a way to adjust that figure for a different ...
58 views

### 3-D Printed Carbon Fiber UAV Skin

aviation pros! New to the aviation/RC world and would like to ask a serious question about using composites for the skin of a UAV I am developing my first time out. Want to use carbon fiber for a ...
45 views

### How much the true altitude will be lower than indicated altitude by 10°C colder?

Aproximately how many perecent the true altitude will be lower than your indicated altitude , if the temperture is 10°C colder than standard ?
53 views

### When is a high pressure system associated with IFR/MVFR conditions?

So I've read that typically high pressure systems bring good weather and clear skies. However, for the current high pressure system we're experiencing in central USA, we're having quite a bit of IFR/...
79 views

### Wing pitching moment decomposition into two terms

Summary: Assuming constant angle of attack $\alpha$, speed $V$, and lift $L$ applied at the center of pressure CP (whose position is $x_{CP}$), the distance $(x_{CP} - x_O)$ between the moment ...
243 views

### Is the air in aircraft cabin toxic?

I just listened to the recent BBC podcast episode Aerotoxicity: the hidden dangers of flying and there were interesting claims there: Cabin air in modern passenger aircrafts comes directly from ...
21 views

### Where can you find wind tunnel visualization data online?

I was wondering if there was a repository of flow visualization results somewhere online, preferably of wing sections categorised in some manner.
122 views

### If all aircraft were TCAS-equipped, how would this change ATC routines?

« The primary purpose of ATC worldwide is to prevent collisions, organize and expedite the flow of air traffic, and provide information and other support for pilots. » (source) If all aircraft ...
137 views

### Why are both ATC and TCAS tasked to prevent collisions although TCAS takes precedence anyway?

« The primary purpose of ATC worldwide is to prevent collisions [...] Many aircraft also have collision avoidance systems, which provide additional safety by warning pilots when other aircraft get ...
92 views

### Would it be possible to start a modern airliner from cold & dark during flight? [closed]

Imagine a suicidal pilot or disturbed passenger who gets access to cockpit, messes with the buttons. He shuts down engines, IRS, and battery, it's the middle of the night at cruise altitude. Would it ...
154 views

### How does the power requirement change when weight and speed change?

Suppose I have an airplane with a certain weight M, which uses a certain amount of power P, to fly at a certain speed V. If I use the same airplane, but quadruple the weight (4xM) and double the ...
191 views

### How often does an airline pilot use the rudder pedals during flight?

How often does an airline pilot use the rudder pedals during flight? Is it only during takeoff and landing? I am interested to know the rudder pedal usage time in minutes per average short range ...
73 views

### What is the general process for flying a private aircraft to another country?

Let's say I want to fly a private airplane to another country. How does one arrange such a flight? Of course this might vary between states, but in general do you need a special permit to fly in with ...
105 views

### What is the most effective way for a VFR pilot to scan the instruments during manoeuvres?

May I ask your opinion on what is the best and most effective pattern for a VFR pilot to scan their instruments during manoeuvres?
130 views

### Who was the US military pilot who crashed his plane and was accused of selling it to the Russians?

There was recently news regarding a story of a former US military pilot who crash landed his plane somewhere in the southwest. He was accused of flying the airplane to Mexico to deliver it to the ...
171 views

### Why does the turn coordinator ball move to the right during a climb?

In a light aircraft like a C172 or PA-28, during a climb the ball in the turn coordinator moves to the right. Why?
60 views

### How have fuel consumption and emissions per passenger/kilometre declined since the first jet airliners?

The efficiency of jet aircraft has improved since the 1960s. Is it possible to chart figures that show how consumption and emissions of pollutants and CO2, per passenger/kilometre, have declined ...
83 views

### How can I acquire an N number that's showing as deregistered?

I'd like to use an N number that is listed as available. But when I request it, it shows as being deregistered. How can I get this number for my aircraft?
107 views

### What is the purpose of the pressure relief door fitted on the PW1127G-JM engines of the A320NEO?

Hey guys many times during my exterior walkaround I noticed on the A320NEOs that they have this pressure relief door and our SOP for the exterior walkaround states to check that this door is closed. ...
349 views

### What is this unusual leading edge flap on a B737-200?

On this video of Air North's gravel runway-equipped B737-200, there's what appears to be a small leading-edge flap (Krueger flap?) inboard of the engine. Refer to the screen shot below. What is this?...
126 views

### What's the exact moment were the spoilers are supposed to be deployed on a A320?

Are they deployed when the levers are pulled back to 'IDLE' or only when pulled back to 'Reverse'? I still can't figure out, 12 years after, why flight TAM JJ3054 crashed into a gas station and a ...
122 views

### Why is there a minimum altitude for at least some high-speed jet engine restarts?

While reading this other question about envelope constraints for jet-engine restarts, I noticed something odd in the graph provided (of the relight envelope for the Honeywell HTF7000 medium-bypass ...