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11
votes
2answers
2k views

Is there any application where the crescent wing would be the best wing planform?

To my knowledge the only aircraft featuring a crescent wing that was built in numbers was the Handley Page Victor. It seems that a crescent wing offers the possibility of a high subsonic/transonic ...
8
votes
1answer
2k views

What is the average temperature in the luggage hold of a passenger plane? [closed]

I am asking this seemingly odd question, as we'll have to transport some medicine in our luggage and it's supposed to be stored at temperatures between -8C and <...
2
votes
1answer
678 views

Still using knots, nautical miles, inches of Hg. Is that impossible to switch to SI units? [duplicate]

Why doesn't the aviation industry use SI units?. I believe only a few countries use meters and other SI units in air transportation, including India and China (please correct if wrong). Using kts ...
5
votes
1answer
640 views

Brace position - Why hands atop head in the UK, but on ankles or atop seat in front in the US?

Source: Does the brace position save lives?, By Oliver Smith, 2013 Mar 13, telegraph.co.uk "To adopt the brace position passengers should place their feet and knees together with their feet firmly ...
6
votes
1answer
539 views

What is the weight at which an aircraft no longer requires a licensed pilot on board in Europe?

According to this (somewhat dubious looking article): Since it is so light, the FlyNano falls under the weight of what is considered to be a plane, so in most countries you won't need a flying ...
18
votes
2answers
6k views

Is freezing of windows normal in airlines?

Recently I was flying on an Airbus A320. While cruising around 37,000 feet, I noticed half of the glass on the window had frozen. But it was a thin layer of ice. Was it anything to be concerned about?...
5
votes
2answers
2k views

At a constant power setting, does TAS change with altitude?

I found a lot of references to the question but no definite simple answer. What would be the influence on true airspeed (TAS) for same airplane at same throttle setting flying straight and level at ...
8
votes
2answers
5k views

How are Victor airways defined and numbered?

I am wondering how Victor airways get determined. What determines how many 'segments' they are? For example some airways connect two VORs only, while other airways stretch across (or "connect the ...
3
votes
1answer
390 views

What aircraft design elements contribute the most to sustained flight?

If I wanted to design an aircraft for autonomous operation and maximum endurance, what design philosophies provide the greatest benefit? I'm imagining a powered glider. Does not have to be highly ...
13
votes
3answers
5k views

Does European airspace use the metric system?

I figured this was probably a no brainer, since Europe uses the metric system, I assume the airspace does... But then I remembered that aviation likes international standards, and I know the US uses ...
8
votes
3answers
7k views

How do you determine the proper rate of descent for landing?

I'm trying to use a simulator to learn to land properly. One part that I'm finding really tricky is picking a proper rate of descent. I know I'm supposed to do my best to keep it so I have two red ...
2
votes
2answers
794 views

Flightradar24.com track info [duplicate]

What is the meaning of the track info found on Flightradar24, as seen below? Would be the angle between the route and the equator?
9
votes
1answer
1k views

Does a safety wire prevent a fuel filter to detach during flight?

I know that fuel filters on aircraft engines have some features that avoid the bowl from detachment during flight, and that they can be secured using safety wire as shown below. I've also heard that ...
1
vote
0answers
95 views

How does air enter and leave the cabin of an airliner? [duplicate]

Yesterday I flew on Airbus A320 and on the airline's board catalogue, there were written some "curiosities". On was written that the air coming from the air conditioning inside the fuselage is very ...
7
votes
2answers
933 views

What are the rules regarding airlines picking up passengers at stops in foreign countries?

Suppose Air Canada flies from Vancouver to Santiago with a stop in LAX. I am vaguely of the belief that they are not allowed to pickup Americans who wish to travel from LAX to Santiago, but I'm ...
12
votes
1answer
18k views

What does the suction gauge actually show?

If I recall correctly correctly the vacuum suction gauge in the TB10 has a scale from 3 to 6, with the green range being 4 to 5 (I might slightly off on those numbers though). It's clearly marked as ...
5
votes
3answers
607 views

How do I keep coordinated on a windy day?

I've noticed on windy days that keeping the aircraft coordinated can be difficult -- the ball will tend to bounce back and forth in the turn coordinator, and I will find myself "chasing" it with the ...
10
votes
4answers
5k views

In calm winds, which runway should I select at an untowered airport?

In calm wind situations, approaching an uncontrolled airport with no other aircraft reporting on CTAF, which runway should I select that would cause the least safety hazard? Especially at an airport ...
46
votes
4answers
8k views

Why are many jet aircraft designed to cruise around FL350-370?

If the flight distance permits, the B737-800 will cruise at FL350, the A320 a little bit higher... Flying at FL370. Photo: Live from the Flight Deck by GolfCharlie232 (reframed) Elements such as: ...
1
vote
1answer
948 views

Is there a set of laws which govern international flights? [duplicate]

A few years ago, my brother and I were aboard an Emirates flight from Australia to New Zealand. At the time, I was 16 and he was 14. At one point in the flight we were both offered alcoholic drinks. ...
0
votes
1answer
255 views

Strange facility out west near California; what is this place? [closed]

While on a flight to San Francisco from New York, somewhere over California or Nevada, I saw this from my window; what the heck is it?
10
votes
1answer
1k views

What are the requirements of ferrying a spare engine?

It was not uncommon in the 60s and 70s to have B747 ferrying a spare engine. (source: Australian Aviation) Was that allowed only on aircraft specifically designed with a pod, or was that possible to ...
35
votes
2answers
13k views

Jet engines: are they owned by the airline or just rented?

For commercial jets, the engines are complex parts of the aircraft, are the most expensive components, and must be carefully maintained. Source When a company buys an aircraft, do they also own the ...
11
votes
1answer
3k views

What are the requirements to convert a license from Iran to USA?

What is required for someone who has CPL, IR and CFI licenses from Iran to fly in USA? What is the requirement to convert license?
11
votes
4answers
3k views

How would modern jet fighters engage and defeat prop driven fighters?

How would modern jet fighters engage and defeat prop driven fighters? Assuming all things being equal (avionics, weapons, etc), if the two aircraft were co-altitude in a level merge, what tactics ...
11
votes
2answers
5k views

What determines crosswind limits?

What is typically the limiting factor for how large a crosswind component a given plane can be safely landed in? My impression is that larger planes are less sensitive to crosswind than smaller ones -...
13
votes
5answers
3k views

Could a plane be constructed to be fly in fixed-stick roll-stable circles?

According to https://aviation.stackexchange.com/a/12511/973 it is not possible for a plane to aerodynamically recover from a roll disturbance. Is that an inherent limitation of how planes could be ...
0
votes
0answers
72 views

Routers on airplanes [duplicate]

I think this is an okay place to ask this. Let me know if it is not. In about a month, my school is going on a school trip and the plane ride is going to be around 15 hours. I was think about setting ...
19
votes
3answers
5k views

What does it mean for a plane to be aerodynamically stable?

I've heard that most planes (excepting fighter jets) are "aerodynamically stable." What does that mean? Let's say you're cursing around in a Cessna 172 without autopilot, and you take your hands off ...
18
votes
2answers
8k views

What are the most efficient layouts of multiple runways?

Many airports have more than one runway. How should runways be built in order to achieve maximum usage and minimum delays? Many major airports have most, if not all, parallel runways. Examples ...
14
votes
1answer
1k views

Why do aviation careers have age limits?

Many aviation careers have mandatory retirement ages. Airline Pilot (licensed with FAA): 65 (raised from age 60 a few years ago) Controller FAA: 56 NATS: 60 Why do these age limits exist? Is it a ...
12
votes
1answer
2k views

Was the Hughes H-4 Hercules capable of flying out of ground effect?

According to the wikipedia article the Hughes H-4 Hercules (Spruce Goose) reached a maximum altitude of 70 feet on its flight. At this altitude the aircraft was still in ground effect. Would the H-4 ...
3
votes
1answer
953 views

Can a bullet hit make the cockpit door open?

If there is a hijack situation and the terrorist guy shoots at the cockpit door to go inside, will that work? Are the cockpit door locks in commercial planes like 737s etc good enough to handle a ...
3
votes
1answer
6k views

Where in the world is it possible to be a foreign air traffic controller (non-military)?

To work as an FAA controller, you must be a U.S. citizen. To work as a EUROCONTROL controller, you must be a national of one of their member states. Per standard governmental employment laws, I ...
5
votes
4answers
50k views

What is the maximum altitude a skydiving plane can fly?

Is there a standard maximum altitude which skydiving planes can fly? I am mainly asking about the sports activity, not military parachuting.
7
votes
0answers
2k views

Why were the toggle switch guards in the Space Shuttle titanium? [closed]

I recently found out that the little protective rails over the toggle switches in the space shuttle were made out of titanium. I'm not sure of which alloy specifically, but probably 6AL4V (or "Grade ...
9
votes
1answer
1k views

Do airline pilots identify failed engines in the same way as light aircraft pilots?

Do the two old adages of light multi-engine flying, namely "Dead foot, dead engine" and "Raise the dead", still apply when flying transport-category aircraft? Or do airline pilots need to rely on ...
10
votes
3answers
5k views

Why would a commercal flight circle while enroute?

While selecting random flights to learn about FlightRadar24, I came across AC7311 flying from Toronto, ON (CYYZ) to Indianapolis, IN (KIND), and saw that it flew a couple of circles southwest of Lima, ...
10
votes
2answers
844 views

What are the data elements shown on the GE235 flight data recorder (FDR) plot?

The Aviation Herald already has an image of the Flight Data Recorder information from the crash of TransAsia GE235: (click to enlarge) I have determined that the green lines are for engine 1 and the ...
20
votes
4answers
22k views

What is a Vmc roll?

Many aviation discussions of the TransAsia GE235 accident include comments like "that was a Vmc roll". What is a Vmc roll and how should you avoid it and/or recover from it?
0
votes
3answers
1k views

Why is there no alert if shutting down a running engine during flight? [duplicate]

In reference to Flight 235, there is a lot of speculation going on today, and since the flight recorders' data indicate that the running engine was shut down manually, everyone is suspecting that ...
2
votes
1answer
362 views

Approximately what percentage of aircraft are equipped with RNAV?

I was hoping someone could provide me with an estimate of what percentage of aircraft are equipped for RNAV (Area Navigation). I'm more interested in commercial aircraft, but business and general ...
16
votes
4answers
4k views

How do landing gear retracting into the wing affect performance when deployed?

On many aircraft with low wing, landing gear (either wheel, leg, or both) retracts into the wing. Thus, when deployed, a significant part of the lower surface of the wing is not as clean as when the ...
36
votes
8answers
18k views

Why are First/Business Class seats at the front of aircraft where it is the least safe?

According to this image, taken from The Science of Survivability (Page 79) from NOAA, the statistically safest seats to sit in are at the rear of the plane (69% survival rate vs 49% at the front). ...
13
votes
2answers
13k views

What is the typical aircrew for a cargo flight?

What is the typical aircrew for a civilian (not military) cargo flight? From my limited web searches, it seems that there would be three crew members: Pilot Co-pilot (I assume there must always be ...
31
votes
2answers
12k views

Why does afterburner exhaust have “pulses”?

Instead of being consistently-dense, the afterburner exhaust looks "pulsed" in these pictures below. Is this a trick of the camera, a natural result of interaction with the air, or is there some ...
8
votes
1answer
2k views

Do glider pilots have to wear parachute in countries where mandatory even if flying with a foreign glider?

Today I saw this video on Vimeo that shows a pilot flying a new solar glider (N- registered aircraft) in Italy without wearing a parachute (I believe in US is not mandatory). Actually here in Italy ...
29
votes
3answers
8k views

Aircraft pilot's seats: what is the notch for?

If you do a Google or Bing search for "Aircraft Pilot Seat" then choose images, you might notice a large number, perhaps majority of them, have a notch cut out of the front of the seat. What is this ...
5
votes
1answer
433 views

Is training required under §61.55 to move from PIC to SIC?

I am current as PIC in type on a jet requiring two crew members. I will be out of currency as PIC soon and my company wants me to move to SIC position when that happens. Am I required to have ...
3
votes
2answers
830 views

When is Minimum Safe Altitude Warning triggered?

I know that Minimum safe altitude warning (MSAW) alerts ATC and pilots if an airplane is under the risk of controlled flight into terrain. But when is this alarm triggered? What is the minimum ...

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