# Questions tagged [turbulence]

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

83 questions
Filter by
Sorted by
Tagged with
1 vote
182 views

### Can smaller wing area improve the aircraft experience during turbulence?

Amid the recent incident of Singapore Airlines flight 321, leaving one dead after a severe turbulence, I ask myself if having an aircraft with smaller total area, there is less turbulent air that ...
• 3,327
1 vote
18 views

### Input Parameters for Combustion Chamber

I am doing a column breakup study. But for a better study I need air velocity, turbulence intensity (not primarily needed though),temperature, pressure and same parameter for injected liquid fuel. I ...
• 99
3k views

### Why might a flight in turbulence turn off cabin lights and heating?

I was on a flight from Sofia to Bologna in mid-September of 2017. It was an early evening flight (can't remember what time we took off but it was already dark), and soon after takeoff, around the time ...
• 141
191 views

### Is there a relationship between ocean tide and turbulence?

Especially at lower altitudes, can we asume that if the tide looks high that there would be more turbulence and vice versa?
• 3,327
1 vote
54 views

### What are the least and most turbulent hours of the day?

Yes, it is quieter on the early morning, but what about the other hours of the 24 hours of the day? I want to know statistically which hours of the day are the most and least turbulent, is there any ...
• 3,327
228 views

### Is it better to fly faster or slower through turbulent air?

If you had to pass through turbulent air, and your only goal was to give the smoothest ride possible to your passengers, would you push that throttle or would you reduce the throttle, or would it be ...
• 3,327
2k 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 ...
• 151
170 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 ...
• 13.5k
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.
• 3,327
55 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?
• 249
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 ...
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. ...
• 213
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 ...
• 3,343
14k 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 ...
• 111
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 ...
• 435
489 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 ...
• 2,750
122 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 ...
1 vote
192 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 ...
• 19
152 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?
1 vote
198 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 ...
• 1,958
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 ...
• 173
1 vote
93 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 ...
• 141
765 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 ...
1 vote
210 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 ...
• 1,502
378 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?
• 914
1 vote
161 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 ...
146 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). ...
2k views

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

These terms seem to have the same meanings. Can anyone differentiate them?
• 1,567
1 vote
433 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 ...
190 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% ...
238 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 ...
• 131
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 ...
69 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 ...
404 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 ...
1 vote
139 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 ...
• 461
734 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 ...
• 1,713
2k 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 ...
• 73
188 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 ...
• 1
734 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 ...
• 131
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 &...
• 311
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?
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.
• 3,474
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 ...
811 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 ...
1 vote
835 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 ...
• 379
1 vote
820 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.
• 21
2k 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 ...
• 5,809
894 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 ...
1 vote
60 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 ...
• 717
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 ...