Questions tagged [turbulence]

Questions about air turbulence, clear air turbulence, or other air movements that cause loss of control and discomfort in flight

Filter by
Sorted by
Tagged with
5 votes
3 answers
1k views

If calculating turbulence is computationally expensive, why not do something simpler?

I understand that people use the RANS/LES equations to calculate how air flows above a wing. But what is the exact formula that people use to derive coefficients like drag / lift after doing these ...
Curtis Chong's user avatar
3 votes
2 answers
132 views

How to avoid rotors and other dangerous turbulence around mountains?

I would like to try flying around some mountains but have never done so before. I am aware of some things to look out for: Lenticular clouds (a sign of mountain wave) Flying on the leeward side of ...
Cloud's user avatar
  • 13.3k
5 votes
5 answers
2k views

What is the least turbulent altitude under 10,000 feet ASL that planes usually fly?

Statistically speaking, at what altitude under 10k feet there are less chances for turbulence during a typical flight? Personal experience is also welcomed.
Gabe's user avatar
  • 1,307
0 votes
1 answer
52 views

Over which types of ground surfaces do we have more updraught?

When a light airplane is flying around 2000-3000 ft AGL, over which places will it deal with updraught more?
AIRWAYLOVER's user avatar
5 votes
3 answers
1k views

Is turbulence a random process?

Is turbulence in air/fluid a random or a deterministic process, and why is it so hard to solve? For sure if it is random it can't be solved... Or maybe it just appears to be random because of our lack ...
user avatar
11 votes
5 answers
4k views

Do airliners respond to mild turbulence in real time?

I've always been fascinated with the impact of ailerons on an aircraft's trajectory; from what I have seen sitting by a wing is that the slightest movement can bank the aircraft quite significantly. ...
roganjosh's user avatar
  • 213
11 votes
3 answers
5k views

How do I intentionally fly into turbulence?

How could I plan a flight to increase my chances of a fun ride through turbulence? What if I want to plan my flight before the weather forecast is available? The internet is full of people who are ...
Anonymous Physicist's user avatar
11 votes
5 answers
7k views

Feeling of falling during turbulence

I was on a flight recently that went through turbulence that had me convinced I was about to die. To be clear, I love flying. I find the sound of a pressurized air plane cabin to be very relaxing. I ...
ItsMeMarieee's user avatar
8 votes
1 answer
1k views

Location on the wing where obstacles least disturb airflow

I have a model airplane whose wings I would like to fit with light strips top and bottom. These light strips would be across a significant portion of the wing's span. Without extensive study (wind ...
fool4jesus's user avatar
6 votes
1 answer
402 views

Do business jet beds have safety belts?

I regularly notice reports of injuries due to turbulence on AVHerald. I've also seen photos of bedrooms in aircraft such as the Boeing BBJ. Are beds fitted with 'seat' belts to stop you hitting the ...
Dave Gremlin's user avatar
  • 2,536
0 votes
2 answers
115 views

is it necessary for the velocity distribution profile over a flat plate to have that kind of parabolic shape?

A wind tunnel boundary layer experiment was done for a flat plate with 5 stagnation probes distributed horizontally (each probe has 5 vertical sensors) and a variable flap, for 2 different free stream ...
I.ham's user avatar
  • 1
1 vote
1 answer
171 views

How to describe turbulence and a plane nosediving in a script

I am a screenwriter whose script takes place aboard a plane. There is extreme turbulence during the flight. And at one point the plane nosedives and almost crashes. I want the instructions that the ...
Hillary's user avatar
  • 19
0 votes
1 answer
138 views

Effect of turbulent flow on flight [closed]

What effect does turbulent flow (let’s say over a wing) have on flight? Could I say it reduces flight performance like lift, increase drag?
Jonathan's user avatar
1 vote
1 answer
189 views

Can turbulence happen at landing?

If we exclude wake turbulence, can this turbulence happen at low altitude, for example at landing or take off? How many meters plane drop in turbulence, if that happen at landing, plane will crash or ...
user707264's user avatar
  • 1,722
7 votes
3 answers
2k views

Turbulence from hot weather?

My introduction flight was canceled because of "the turbulence due to heat". They called half an hour before the time of the flight (Cessna 172). I'm okay to reschedule it but I'm a bit ...
mimic's user avatar
  • 173
1 vote
0 answers
91 views

Variables of Dryden Wind Model

How to determine the turbulence intensities (σu, σv, σw), scale lengths (Lu, Lv, Lw) & Angular frequency (ω0) in the given Dryden wind model to generate wind speeds (u_w, v_w, w_w) of civil jet ...
S.Prabhu's user avatar
  • 141
6 votes
1 answer
650 views

Why hasn't there been a case of an airliner breaking apart and crashing due to turbulence in the past 40-50 years?

Most of the breakups involved clear air turbulence as well, the type that still can't be detected today. Examples like: Boeing 707 (BOAC Flight 911) - which crashed near Mt Fuji BAC One-Eleven ...
Lars Knowles's user avatar
1 vote
0 answers
202 views

How does CONFIG FULL provide better handling capabilities in turbulent conditions?

I wanted to get some clarity as to how does CONFIG FULL provide better handling capabilities in turbulent conditions? This line mentioned in the A320 FCTM under the the supplementary procedures ...
Jai's user avatar
  • 1,492
4 votes
1 answer
334 views

Why is the air smoother when you get above the cloud base?

Why is it bumpier below where the clouds form and once you get above the bases the air tends to be smoothers?
Name's user avatar
  • 886
1 vote
2 answers
157 views

Are the turbulence reports by pilots via PIREPs used by other nearby aircraft or air traffic controllers to modify operations in any way?

I know the pilots are required to report turbulence experienced in the aircraft via PIREPs. The data for turbulence with lat,long,alt and the severity is available. I am wondering if the PIREPs are ...
distributedconscious's user avatar
2 votes
1 answer
141 views

Could leading-edge dynamic stall occur for a tripped airfoil?

As far as I know leading-edge dynamic stall is characterized by the formation of a Leading edge vortex. This leading edge vortex forms due to the 'bursting' of the LSB (Laminar separation bubble). ...
izri_zimba's user avatar
2 votes
2 answers
2k views

What are differences between vortex, swirl, eddies and wake?

These terms seem to have the same meanings. Can anyone differentiate them?
Auberron's user avatar
  • 1,567
1 vote
2 answers
403 views

Why does placing one hand on the head track stabilize you during turbulence?

At 0:40, Lufthansa Capt. Joachim Schwarzenberg advises "Whenever we get turbulence and that can always be the case during 11 hours 40 on such a long flight - that is also the flight time - The ...
user avatar
2 votes
0 answers
183 views

How are Hurricane Hunter planes able to withstand G's as high as 6-7 G in turbulence if the plane is only rated for G loads much lower than that?

I found some conflicting reports on the G limit of the WP-3 Orion, but most sources say the G limit is 2.5 or 3 positive G, which would bring the ultimate load up to 3.7-4.5 G (as there is a 50% ...
Lars Knowles's user avatar
3 votes
1 answer
234 views

Which FARs does the Boeing 737 MAX conform to with respect to turbulence?

Based on this question/answer it seems that the FARs in relation to turbulence handling have been updated several times over the years. Does the Boeing 737 MAX conform to the latest FARs or to the ...
armitage's user avatar
  • 131
6 votes
3 answers
2k views

People say that modern airliners are more resilient to turbulence, but I see that a 707 and a 787 still have the same G-rating. Why is this?

The 707 was introduced in the late 50's, the 787 in 2009. Back when Air France 447 had recently gone missing, many were speculating that the aircraft had broken up in the turbulence associated with ...
Lars Knowles's user avatar
0 votes
0 answers
68 views

Do aerobatics pilots do more to account for turbulence in their flying than passenger plane pilots?

Non-aviator here. I was trying to make a comparison when talking to a friend earlier about how when you're trying to do something complicated and delicate, you have to do more to account for ...
David Kennell's user avatar
3 votes
1 answer
362 views

Is propeller wake turbulence quantifiable based on operating conditions?

I know the propeller does work on the air and thus the flow behind a propeller is higher than the airspeed. However, what is the quality of this flow? If I were doing a heat transfer analysis of an ...
spaceprops's user avatar
1 vote
1 answer
132 views

Turbulent flows over 6 series airfoils

6 Series Airfoils were developed to enhance the laminar flow region over the airfoil. But, the Reynolds number at which planes fly are high for the flow to be Laminar. Then what's point of introducing ...
Pavan's user avatar
  • 461
2 votes
1 answer
700 views

Does turbulent flow encourage/avert flow separation?

I know that turbulent flow has more energy than laminar flow and hence can sustain adverse pressure gradient for a longer period of time. It basically delays flows separation. But referring to this ...
Johnson's user avatar
  • 1,703
6 votes
2 answers
1k views

Why do wings prefer laminar flow if cd is lower for turbulent flows?

Can anyone please explain to me why we prefer to maintain laminar flow over wings, despite the fact that the overall coefficient of drag appears to reduce as the Reynolds Number increases? I have read ...
sroger13's user avatar
4 votes
1 answer
186 views

How much can a plane benefit from another planes wake?

Could a smaller plane fly in a V formation behind a much larger plane to reduce fuel consumption significantly more than a plane its own size? At what point does flying in a larger planes wake become ...
Muze's user avatar
  • 1
3 votes
1 answer
629 views

Does a decreasing shape factor correspond to greater or reduced probability of separation?

The shape factor ($H=\frac{\delta^*}{\theta}$) is the ratio of displacement thickness, a measure of the thickness of the boundary layer, to the momentum thickness, a measure of the shear stress. I ...
kilojoules's user avatar
9 votes
5 answers
6k views

Do aircraft cabins have suspension?

On cars, we have 'shock absorber' suspension that decouples the passengers and loads from the road vibrations, bumps etc. On planes do we have any form of suspension that decouples the passengers &...
midnightBlue's user avatar
-2 votes
1 answer
142 views

What needs to be done when experiencing severe turbulence at an altitude of FL270 with No ATC and Mode C failure? [closed]

Flying at FL270, you experience sever turbulence and Mode C failure, and the ATC channel is heavily Occupied, what should a pilot ideally do?
The Better Aviator's user avatar
5 votes
1 answer
2k views

Has turbulence ever killed a passenger?

The question is on my mind, because many passengers think there is no need to wear the seatbelt when the seatbelt sign is not illuminated.
summerrain's user avatar
  • 3,364
12 votes
1 answer
3k views

Would the wings of a Boeing 787 be snapped off in the same turbulence in which a DC-8 lost an engine and parts of a wing?

From forbes.com: In 1992, a DC 8 cargo aircraft suffered turbulence so severe over the Front Range of Colorado’s Rocky Mountains that its left outboard engine was completely ripped off as well as ...
Willy A's user avatar
-1 votes
2 answers
772 views

How come the DC-8 plane can withstand +15G from turbulence, but newer planes can only withstand 20% of that amount?

Source - https://www.weather.gov/media/zhu/ZHU_Training_Page/turbulence_stuff/turbulence3/turbulence.pdf (Scroll down for photos) I figured out how many G's the cargo jet took by looking at the ...
Willy A's user avatar
1 vote
2 answers
803 views

How to deal with turbulence while flying glider? (Cautions in applying rudder)

I just watched video explaining how the American Airline Flight 587 crashed It led me to think about glider flying. The cause of that crash was that the first officer ...
gadfly's user avatar
  • 379
1 vote
1 answer
743 views

Why would a plane drop 14.000 ft mid flight?

Just noticed American Airlines flight 221 dropped 14.000 ft mid flight today. Curious, what could have caused this? Here are the flight details.
M Daniel's user avatar
7 votes
5 answers
1k views

How to correct a roll due to turbulence?

I fly a Piper Cherokee 180 (PA-28-180) in an area that has frequent turbulence. When turbulence causes the aircraft to roll to one side I usually try to correct by using aileron and rudder in the ...
DLH's user avatar
  • 5,789
2 votes
2 answers
795 views

What are the particular challenges faced when landing at Bristol airport (UK)?

Earlier this year I returned to Bristol on flight TOM-6633, and like most landings at Bristol the passengers found the experience physically immersive, attention grabbing, and at least a little ...
Grimm The Opiner's user avatar
1 vote
0 answers
58 views

How do commercial pilots know turbulence is ahead? [duplicate]

On commercial flights, an announcement will be made if turbulence is expected ahead and if the route will be adjusted such as moving to a higher altitude. How do pilots know that turbulence is ahead ...
Dan Sorensen's user avatar
28 votes
1 answer
14k views

How does a pilot tell passengers to prepare for severe turbulence without causing panic?

At the start of a flight, the pilot of an aircraft often talks about the expected weather on the flight path, and tells passengers if there is to be some turbulence during the flight. How does a ...
Barney Chambers's user avatar
2 votes
0 answers
91 views

Can new technology help planes dodge turbulence? [duplicate]

With so many technological advancements happening in the aviation industry, will it be possible for airlines to smoothen the effects of turbulence, as turbulence cannot be eliminated? The following ...
Firee's user avatar
  • 9,111
6 votes
1 answer
286 views

What is the physical scale of the turbulence that affects large passenger planes?

What magnitude of displacement of air in turbulence conditions is large enough to affect (i.e. be noticeable in) an airliner? Are there any minimum limits, so that even fiercely turbulent air below a ...
Daniele Procida's user avatar
1 vote
2 answers
506 views

If airliners and commercial planes have turbulence, can helicopters have turbulence?

I was watching a video of an V 22 (Osprey) taking off and it had that white cloudy stuff that looked like turbulence around the propellers. Can helicopters have turbulence too? I know an osprey is not ...
Ella Corley's user avatar
15 votes
2 answers
26k views

Why does a plane shake while passing through clouds? [duplicate]

Why does a plane shake while passing through the clouds? During my last journey all the other passengers started shouting when the plane was passing through clouds. It was the third time I was ...
user23062's user avatar
  • 161
8 votes
2 answers
2k views

Why does wake turbulence sink?

There has been a remarkable story this week of a Challenger 604 business jet being rolled after encountering the wake turbulence of an A380. A Challenger 604 at FL340 operating from Male-Abu Dhabi ...
Daniele Procida's user avatar
12 votes
1 answer
759 views

How is close formation flying possible with things like thermals and turbulence?

This weekend the Blue Angels came to town. The weather was less than perfect. A quick look at SkyVector during their show indicated there was an active AIRMET for moderate turbulence. This made me ...
Ryan Griffith's user avatar