Questions tagged [wake-turbulence]

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

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37
votes
3answers
9k 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 ...
11
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1answer
464 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 ...
8
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1answer
798 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?
4
votes
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 ...
3
votes
2answers
872 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 ...
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 ...
32
votes
2answers
7k 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 ...
12
votes
3answers
4k 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 ...
29
votes
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 ...
10
votes
1answer
476 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 ...
3
votes
2answers
480 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. ...
1
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2answers
129 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 ...