# All Questions

15,769 questions
10k views

### What is the minimum stopping distance for a 747-400?

Im looking at purchasing disused 747-400: The aircraft will be stripped of all seats and other non essential items. The aircraft will be then flown to my property in Victoria, Australia and perform ...
11k views

### Why are there so many different propeller shapes?

While doing an image search, I found these images of propellers: and Some appear to be straight-ish on the leading edge and curved on the trailing, some curved on the leading edge and straght-ish on ...
12k views

### What is the ratio between time in the air and time on ground for an aircraft?

I suppose it may be different from an airline to another. Given the maintenance, the time to load/unload the aircraft, the time the aircraft is grounded because there is no flight scheduled (e.g. at ...
5k views

### How dangerous can it be if something falls from a flying aircraft?

How dangerous can it be if something falls from a flying aircraft?
3k views

### Is this takeoff of a 767 in bad weather conditions a normal procedure?

In this video, a 767 takes off in bad weather conditions. The comments of the video aren't very professional, so I ask here: Is this a legitimate takeoff? Some comments say that this was a close ...
16k views

### How does one become an airline pilot in Australia?

I am 19 years old and from a young age I have always wanted to become a pilot at an airline. Becoming one is my biggest dream, to me an airline pilot is the most coolest jobs - I get goosebumps just ...
1k views

### if temperature is increased but the volume contained in a area, will an air balloon lift?

I understand the archimedes principle as it relates to water, but am having trouble reconciling a thesis related to a hot air balloon. If theoretically, I could increase the temperature of air ...
693 views

### What is the maximum range of a BAe 146-300? Can auxiliary fuel tanks be added?

What is the maximum range of a BAe 146-300? I saw one on Flightradar24.com which started in western France and is still flying non-stop to Greece (flight in progress at the time of posting). I was ...
11k views

### Do military pilots use amphetamines or other stimulants?

Related to this question: Do military pilots have flight & rest hours regulation? According to the wikipedia article, amphetamines were commonly given to Allied pilots. Are they still in use ...
233 views

### How are performance variables accounted for when testing solar-powered aircraft?

With so many factors that could affect performance (wind, visibility range (amount of light), angle of the sun, etc.), how do they accurately test solar aircraft flight time? Any tips for doing my own ...
8k views

### How does an aircraft form wake turbulence?

This question discusses how wake turbulence can affect planes flying in formation. It got me wondering, how do aircraft (the wings in particular) form wake turbulence to begin with? It can't be as ...
1k views

### Who was the oldest pilot ever so far?

Based on any historical records, who has been the oldest pilot ever? "Pilot", I mean, somebody who managed to take off, return to the airport and land without help. That much is probably not possible ...
2k views

### Is it possible to obtain a PPL after having a brain surgery?

I am a 24 year old who has always aspired to become a pilot. I've decided to eventually get a private pilot's license so I can fly just for fun. However, a few months ago I was diagnosed with brain ...
996 views

### Are there examples (current or historical) of commercial aircraft seating arrangments beyond the standard today?

Excluding various first-class seating arrangements, are there any examples in history or today, of an airline that has implemented a non-standard seating arrangement? For instance, most military ...
2k views

### What is the advantage of increasing an aircraft's horizontal tail surface area?

Most aircraft have horizontal tails. What is the advantage of increasing the horizontal tail surface area?
4k views

### How often does fuel dumping from planes in flight actually occur?

There are a couple of questions about the emergency procedure of fuel dumping, used to reduce the weight of airplanes to be able to land. This is certainly interesting, regarding environmental ...
3k views

### How are these Airbus A350s flying in formation without being affected by wake turbulence?

The first photo in this article appears to depict three Airbus A350s flying closely in tandem at approximately the same altitude. I thought that a large jetliner would leave a trail of wake ...
2k views

### Is it possible to recover dumped fuel?

During emergencies pilots are authorised to dump fuel, but is there any way or method to recover the fuel that has been jettisoned?
4k views

### Are there design differences between propellers powered by air (wind-power) and propellers for aviation?

What is the difference of design between a propeller designed to be powered by the wind (i.e. those huge wind power turbine blades) and those designed to be used to propel a plane that are powered by ...
168 views

### Can a short in instrumentation wiring create enough 'spark' to ignite unvented fuel fumes? [closed]

Although this question relates directly to the NTSB findings on TWA Flt800, I was always puzzled and dissatisfied with the reason that failure in the instrument wiring harness inside the center wing ...
45k views

### What happens when an aircraft breaks the sound barrier?

What happens when an aircraft breaks the sound barrier? Why can't it break the sound barrier near the ground?
19k views

### How do big planes like 737 manage fresh air for passengers during flight?

How do the big planes (e.g. A380 or 737) flying on high altitudes manage to get fresh air for passengers and crew during the flight? I know the inner space of the plane used for passengers and crew ...
7k views

### Why was there a rattling noise coming from the left engine of A319?

I recently flew on an Airbus A319. When boarding the aircraft from the front entrance we passed in front of the left engine. The fan blades were spinning and there was a rattling noise (like when a ...
4k views

### Why is fuel usage discussed per time, not per distance?

I don't understand why sometimes the fuel used for a flight is discussed in terms of fuel used per time. I think I have seen it a couple of times here - not sure whether it was in some common context. ...
2k views

### How do you compare private jet and commercial jet efficiency?

I'm curious about commercial airplane efficiency vs private jet efficiency. I was trying to compare something like a modern 737 flying a full commercial flight from NYC to LA vs an Embraer Phenom 300 ...
4k views

### How does the particular piece of flap behind an engine on a B777 work?

On several B77 photos, I notice that flaps just behind the engines are not always coordinated with the others flaps. On this photo flaps are extended but not behind the engine whereas on this photo ...
8k views

### Is there any equation to bind velocity, thrust and power?

I am designing a remote controlled airship. I will tune it so that the lift given by Archimedes' Principle will exactly balance the weight of all the structure. It will be propelled by brushless ...
2k views

### Has any aircraft ever been designed such that it could descend safely with no control input?

Has there ever been any aircraft of any type that could glide safely with no control input simply based on the way the frame of the aircraft was designed? I was trying to think of requirements for ...
28k views

### What determines in which direction a runway is used?

A nearby airport has a single 05/23 runway (3900m long), where airplanes start and land in one direction during certain periods and in the opposite direction during other periods. How is the ...
663 views

### How much extra work to get a glider licence?

I have my SEL Private VFR licence. I recently went on a glider flight, and I loved it. How much extra work does it take a typical pilot to transition from SEL to gliders? What extra material will ...
2k views

### Are airline pilots worn out at an age of 55?

Lufthansa's pilot union is calling for a strike to defend pilot's right to retire at the age of 55. They argue that the stressful job of flying is too much for older people. This provokes two ...
4k views

### Is it possible to go-around at Lukla Airport?

On this airport, it seems the runway end with a wall followed by a mountains. Thus the pilots physically can't overrun the runway and if they decide to interrupt the landing, the go-around maneuver ...
359 views

### Which FAR/AIM addresses Shortest Turn to Assigned Heading vs Runway Traffic Pattern?

Today I was in a simulator on runway 20R at KSNA. ATC gave me a VFR clearance and told me to fly heading 080 on departure. The runway has right traffic. I turned right and was told by ATC I should ...
1k views

### Who controls VFR flights in class B airspace in Europe?

I was reading about this incident where a near miss occurred in class B airspace between IFR and VFR flights that were in contact with different controllers. So I would like to know which controller ...
266 views

### When will Europe allow phones (to communicate) on planes?

Currently USA has allowed phones to be used in commercial flights, is there a similar ruling coming to Europe or will my mid air Bluetooth battles have to wait?
3k views

### Why does Class D overlap class B around SeaTac? …and other Seattle Bravo airspace strangeness.

I noticed KBFI's class delta overlaps SeaTac's bravo by 500 to 700 feet. Does anyone know which tower the overlapping airspace belongs to? Does it classify as Bravo airspace and do you need to hear ...
9k views

### Which hand do fighter pilots use for the control stick?

Here is a question that has been bothering me for a while. Do right-handed fighter pilots use their right hand to hold the control stick? And do left-handed fighter pilots use their left hand? Or is ...
8k views

### Do military pilots have flight & rest hours regulation?

I have read that civil pilots have stringent regulations regarding flight hours and hours of rest between flights. What about military pilots? Does it change between wartime and peacetime? Between ...
1k views

### What is the minimum power system required to fly a commercial aircraft?

I heard of a A320 landing, no lights, both generators out, RAT deployed, and with only 28VDC(battery power), made a successful landing. Is this possible?
4k views

### If AWOS reports IFR conditions but I can see at least three miles, can I take off or land?

The uncontrolled airfield where I have my airplane gets foggy in the morning occasionally, but there have been times when there is just a little fog where the AWOS station sits so it reports 1/4 mile ...
2k views

### What radios are airliners / large aircraft equipped with?

I know that pilots have to talk to the tower over the radio, and apparently you have to tune the radio to the right tower frequency. I've also heard that in an emergency, you're supposed to "squawk ...
604 views

### Could flight MH370 have suffered decompression due to a high altitude bird strike? [closed]

MH370 was flying at 11 km altitude at a speed of 872 km/h. It is known that some birds can fly at this altitude, e.g. the Rüppell's vulture. So, could such a bird hitting the windscreen at roughly 900 ...
42k views

### When do we use IATA codes and when do we use ICAO codes?

I found on this website several questions speaking of IATA, ICAO and airports codes. The fact that two identification codes for the same airport exist means there are cases where you use one, and ...
3k views

### How much does go-around cost?

What is the extra cost of aborted landing and go-around for typical "big" airliner?
2k views

### What is the easiest way for a new private pilot to visit Manhattan?

As a goal, I would like to: Limit the difficulty of the class B airspace by staying at uncrowded areas Minimize the time it takes to get into the city
2k views

### What is the direction of the sideslip induced by roll on a conventional aircraft?

For the sake of this question let's assume that the considered aircraft is an A320. The question is what is the sign of the aerodynamic $C_{n_q}$ coefficient? In another word, when the aircraft starts ...
2k views

### Where do all the bullets end up? [closed]

When planes engage with guns, many of the shots are misses... what happens to the bullets? Do they kill people on the ground and damage facilities? Do we have any records of this happening?
1k views

### How often is communication lost with aircraft?

I just read the NTSB press release of Northwest Airlines Flight 188 that flew more than one hour without making any radio contact. I imagine there may be many causes for losing radio contact with the ...