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Questions tagged [wake-turbulence]

Turbulence that forms behind an aircraft, which is particularly dangerous during takeoff and landing.

6
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3answers
227 views

What vertical separation is required in a holding stack to avoid wake turbulence?

Sometimes in my free time I play Endless ATC, a game where one acts as the approach and departure controller. In the game (as in real life) the controller is forced to put planes in a holding stack, ...
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2answers
91 views

Could reduced-lift wingtips allow an airplane to generate less wake turbulence?

Would it be possible to weaken the wake vortices generated by a large aircraft (which can be dangerous to smaller aircraft behind the large aircraft, and are the limiting factor determining how ...
12
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1answer
357 views

If a pilot's plane suddenly and unintentionally becomes inverted, what is the pilot's best course of action?

If a plane was suddenly inverted through no action of the pilot, say wake turbulence from a much large plane (think 747 vs. Learjet), should the pilot first try to right the plane or get the nose ...
6
votes
1answer
301 views

Is there a wake turbulence difference between B737s?

I've heard pilots talking about how the new 737s produce much more wake turbulence then the model historically. They described it as similar to the 757, based on anecdotal experience. Have there been ...
1
vote
2answers
171 views

would a dimpled heat shield reduce heat transfer during reentry? [closed]

Would a large ceramic golfball absorb less heat on reentry than a standard sphere? "The difference in the flowfields around a smooth sphere and a rough, or dimpled, sphere can be seen above. Since ...
9
votes
2answers
255 views

Why does wake turbulence seem to move upward on touchdown?

Source of the first photo I saw this photo of business jet touching down (first picture) and the smoke of tires forming wake turbulence . as I have provided other pictures (second and third) of "what ...
11
votes
1answer
391 views

Does the wake from horizontal stabilizers merge with the wing wake?

There is already a long series of questions about the downwash and tip vortexes with nice images, but I'm going to add another one... Large airliners (A380, B747-8) have horizontal stabilizers ...
3
votes
2answers
339 views

How and why do wake vortices come together to form two tip vortices?

Wake vortices are created all along the wingspan but, the vortices come together to form two tip vortices. How exacly does this happen and why does it? I know that wake vortices push air to the side. ...
8
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3answers
400 views

Are there areas to avoid while flying formation with a larger aircraft?

Consider a fighter jet flying formation with an airliner-size aircraft, such as during an interception or mid-air refueling. Are there areas which should be avoided by the fighter jet? I.e. are there ...
61
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2answers
9k views

Why isn't the Presidential 747 “Air Force One Heavy”?

Aircraft with a maximum takeoff weight of at least 300,000 pounds add the word "Heavy" to their callsign. (Example: Lufthansa 415 Heavy in this video.) The current Presidential 747's have a maximum ...
3
votes
2answers
642 views

What is the relationship between angle of attack and wake turbulence?

It is said that when the preceding airplane is heavy, clean, and slow, wake turbulence is much hazardous due to greater angle of attack is requried. However, why does increasing angle of attack result ...
1
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0answers
155 views

What are normal landing separation minima? [duplicate]

As far as I know we have separation minima of 10 minutes in horizontal flight, so do we have any equivalent separation minima for landing? If so, how it is possible to land two aircraft in a very ...
8
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1answer
664 views

What is the safe separation for landing a Cessna-172 behind a commercial airline jet?

When is it safe to land a Cessna-172 after a commercial airline jet has landed?
10
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1answer
384 views

What is the minimum separation between two landing A380s?

I have always assumed that landing separation depends on wake turbulence limits depending on weight class. However I see that no minimum separation needed for the A380 as trailing aircraft (and in a ...
6
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2answers
1k views

Why there is no wake turbulence right after touch down or before rotation?

It is said that wake turbulence occurs when an aircraft generates lift and there is no wake turbulence after touch down or before take off. That's how we avoid wake turbulence. However, I've thought ...
6
votes
1answer
831 views

Why aren't departures separated by minimum distance rather than minimum time?

Normally, two departures are required to be separated by a minimum amount of time depending on the weight class of the aircraft. However, I was wondering if someone could explain why departure-...
4
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2answers
281 views

Are most/all flights affected by a noticeable amount of turbulence?

How common is turbulence that is severe enough to feel uncomfortable? I don't mean a little shaking here and there, but a drop that lasts a second or two. Last 2 flights I was on (Paris to Singapore, ...
1
vote
1answer
189 views

How should wake turbulence from aircraft on the ground be avoided during landing?

If a large jet aircraft is holding short of runway 28L while I am landing a single-engine aircraft on runway 28R, how should I proceed with such a landing?
18
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2answers
7k views

What does it mean when an airplane has the “super” call sign? [duplicate]

What does it mean if an airplane uses the "super" designation after their call sign on the radio?
4
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1answer
3k views

What is the difference between Jet Wash and Jet Blast?

I was reading about Wake Turbulence in Wikipedia and got to know about Jet Wash and Wing Vortex. According to Wikipedia, Jet Blast is the movement of air from the jet exhaust. Isn't this same as Jet ...
5
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1answer
1k views

What type of commercial aircrafts generate strong Wake Turbulence?

I know that 757, 737 generate strong Wake Turbulence and as pilots, we should always be aware of that and caution for the wake turbulence while landing and departing. I would like to know if is ...
29
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5answers
5k views

How do aircraft refueling in-air deal with wake turbulence?

Many fighter planes have the capability to refuel in air. When a plane moves in air, turbulence is generated at its back. To refuel, the fighter plane must come near to the parent plane (which has ...
14
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4answers
2k views

How does wake turbulence affect parachutists?

If one were to parachute out of a jumbo jetliner, would wake turbulence from the plane be an issue? A 747 for instance produces much more wake turbulence than the smaller planes usually used to drop ...
35
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3answers
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 ...
12
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3answers
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 ...
9
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1answer
1k views

Minix wingtip vortices mitigation - How does it work?

I stumbled upon this article: Minix wing tip device promises 6% gain in fuel efficiency for airliners. Such an economy is appealing and I must confess the design is "sexy". Could someone expand a ...
12
votes
1answer
436 views

Do the shock waves from a supersonic plane affect general aviation planes?

Are there any considerations to take into account when flying around supersonic aircraft? I know that wake turbulence from large aircraft can pose a threat to smaller planes. Is the same true of the ...
10
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1answer
1k views

When and how can pilots waive wake turbulence holds in the US?

According to FAA rules, controllers are required to hold aircraft 2 or 3 minutes for wake turbulence under certain conditions. When is that wake turbulence hold required, and when are pilots allowed ...
31
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2answers
6k views

What is the cause of unusually strong wake turbulence from the 757?

The Boeing 757 (at least in the US) is in a special class of its own with respect to air traffic control wake turbulence advisories and separation. This is apparently due to it producing stronger wake ...