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Questions tagged [cold-weather]

Cold weather is weather that is officially defined as less than or equal to 0 degrees centigrade (32 Fahrenheit)

6
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1answer
187 views

Who does have a responsibility to make altitude correction for cold temperature?

I work as air traffic controller in Asia and we refer to ICAO and FAA regulations both. As winter is coming, there is a debate on altitude correction(or altimeter correction?) for cold temperature. ...
40
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2answers
11k views

Can commercial airliners fly over central Antarctica during winter?

For example, if an airline decided they wanted to run year round flights on the great circle from Perth to Buenos Aires with a commercial airliner (e.g. A380 or B747), would they be able to do so? Or ...
2
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3answers
644 views

Why do turbofan jets fly faster in cold weather?

Why do turbofan jets fly faster in cold weather at high altitudes? I read somewhere that prop planes do it due to cold weather means air is more dense, and the prop therefore produce more power. But ...
8
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2answers
966 views

How much snow can cover a runway while still allowing commercial airliners to land safely?

In regards to this question I thought about how much snow is shown on the runway and the exits in the movie. So normally a commercial airport will have a fleet of snow plowers or heaters to keep ...
8
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2answers
3k views

When is deicing required?

For airliners, under which meteorological conditions is de-icing required? What factors (temperature, humidity, dew point, precipitation, etc.) influence the decision to de-ice? Is decision to de-...
1
vote
1answer
749 views

Why is there a time range for holdover times charts?

2016-2017 FAA Holdover Time Guide The FAA publishes holdover times for each winter season and gives a time frame for how long each type of fluid should protect the aircraft from further contamination....
7
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2answers
1k views

Is thermal expansion/contraction a major design problem for large subsonic airplanes?

Most large airplanes flying today are mostly metal, which has a relatively big coefficient of thermal expansion. Cruising altitudes of commercial jets can reach 10 km or more, where the air gets down ...
9
votes
1answer
396 views

How was the “frozen wing flap grease” problem solved? (Antarctica, 2001 emergency evac)

In the June 16, 2016 Washington Post news article A rare, risky mission is underway to rescue sick scientists from the South Pole difficulties of flying in and out of the south pole in winter are ...
10
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2answers
360 views

Is the “glory” optical phenomenon frequently seen by aircraft pilots?

A glory being this optical phenomenon: (Source) It reveals the presence of supercooled water, a hazard for an aircraft (see answers). Due to the way it can materialize, the center of the rings ...
3
votes
1answer
566 views

Do pressure altimeters take into account differences in temperature? [duplicate]

I work as ATC in Korea and recently, I have some question about winter altimeter setting. In my facility, we use winter altimeter adjustment because the aircraft's pressure altitude is lower than ...
6
votes
3answers
864 views

How should Isopropyl Alcohol be used as an AvGas Fuel System Icing Inhibitor?

I understand that 100% Isopropyl Alcohol (IPA) is used as a Fuel System Icing Inhibitor (FSII) additive in aviation gasoline systems—including 87 through 100LL fuel types—for cold weather operations. ...
6
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4answers
157 views

How else can snowy/icy conditions disrupt airport operations?

In casey's fabulous answer here, he identifies several ways snow/ice can disrupt airport operations: Continuous heavy snowfall can eventually close an airport if it becomes impossible to keep the ...
1
vote
1answer
151 views

What is the process to remove frost off an airliner? [duplicate]

My aunt recently was going on a flight home and she boarded the flight, but her flight was delayed due to frost on the aircraft. She noticed this crane like device above the aircraft wing during the ...
2
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3answers
6k views

What effect does cold weather have on helicopter performance?

Recently I was flying around my RC helicopter on a 40 $^\circ$F (4$^\circ$C). At some point in the flight the rotor just stopped moving in mid-air and then I regained control back at ground level. I ...
13
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1answer
3k views

Where does ice collect first on a wing in flight and why?

I've seen some reports that say ice forms on the back half of the wing and on the outside edge of the wing (the part furthest from the body) before it will form anywhere else. I'm wondering if this ...
11
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3answers
2k views

Why doesn't frost form on a moving airplane?

When I was a young student pilot, long before the FAA prohibition on polished frost went into effect, an instructor left a six-inch square of frost on the wing to demonstrate how fast it would ...
8
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2answers
8k views

What do they use to de-ice aircraft and runways on snowy days?

One of the answers to this question mentions how runways are usually in need of de-icing on cold days (which makes sense), and as anyone who has ridden an airplane on a cold day knows, planes need de-...
7
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1answer
2k views

Does Russia still use a Snowtam to report normative brake friction?

Does Russia still use the normative (Russian) brake friction when reporting Snowtams for their airports? What about former Soviet (CIS) countries?
5
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1answer
1k views

Should you sump fuel tanks when the fuel system is below freezing?

I recently saw an argument in a forum I frequent that sumping the tanks when the system was below freezing was a bad idea, as you can't drain solid ice from the fuel system, and there is a chance that ...
20
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2answers
6k views

When is pre-heating a piston engine important, and how does one pre-heat correctly?

As temperatures here in New York plunge toward (and below) freezing it's time for those of us without nice heated hangars to start thinking about pre-heating our aircraft before we turn the key. ...