why do planes slow down in turbulence

The arrival of carbon fiber composites enabled lighter wings and a greater degree of flexing. When a flight changes altitude in search of smoother conditions, this is by and large in the interest of comfort. Passengers are routinely instructed to go back to their seats and refrain from using the washroom whenever there is turbulence, and the pilot has switched on the seat belt sign. Airliners.net is the leading community for discovering and sharing high-quality aviation photography. Try the highly successful SOAR program, Copyright 2023 Patrick Smith / Aerophilia Enterprises, LLCSite developed by LeandroArts. Its easy to picture the airplane as a helpless dinghy in a stormy sea. At five miles out, we were cleared to land. When the wing generates more lift than the total aircraft weight, the aircraft will begin climbing. Answer: In heavy turbulence it can feel like the airplane is going up and down long distances, when in reality it is only a few feet. All of these factors combined make up what is known as the effective dihedral. Often, though, its as simple as looking out the window. In the rearmost rows, closest to the tail, the knocking and swaying is more pronounced. Like cars, buses or trains, commercial aircraft are fitted with wheel brakes. Two factors can determine whether or not passengers are informed of an impending plane crash: if the pilot is in control of the crash, and what is causing the crash. Like much to do with aviation, it depends.. For the first 20-30 years of flight, the ability to slow down by reducing power provided pilots with enough control. The roughest spot is usually the far aft. More questions: This is a BETA experience. All you see is what's outside the window.". It's all a part of aviation," United Airlines pilot Rob Biddle said. How to Get Over Your Fear of Flying in 9 Simple Steps Demystify turbulence. It was, of all flights, a twenty-five-minute run from Boston to Portland, Maine. If you're a passenger on a flight that experiences turbulence, you may have different sensations when the plane is bumping around 35,000 feet in the air. Therefore, for the majority of the time, pilots will slow down in the air by simply reducing the thrust from the engines. Speed brakes, or spoilers, were in use as early as the late 1930s in glider aircraft, as pilots needed a way to slow the exceptionally aerodynamic gliders for landing. Even with my shoulder harness pulled snug, I remember holding up a hand to brace myself, afraid my head might hit the ceiling. One of the main difference with Airbus is that Boeing uses outboard ailerons, located at the middle of the wing. Air brakes. Somehow Airbus managed with fill in 50 kg more per square meter than its Boeing equivalent, the B777. 6) Do an activity to put your mind elsewhere. The traffic wed been following, a 757, had already cleared the runway and was taxiing toward the terminal. And know that no aircraft has ever crashed because of turbulence. Five of these passengers were administered first aid, and the remaining three were admitted to three different hospitals in Kolkata. "Thats why pilots suggest if you want to avoid the biggest bumps to try and fly at night or early in the day," Frazer said. The aircraft itself has multiple lights on its exterior to help pilots land when its dark (and to help others spot the plane). Usually when it is pretty light and it happens sporadically and infrequently I just ride through it below yellow line. Also, weather sources and onboard radar allow aircraft to avoid the worst of the weather. The Airbus 320 and the Boeing 737-800, the two most common commercial planes, have wing loadings of 600 and 570 kg/m2. Even with full opposite aileronsomething never used in normal commercial flyingthe ship kept rolling to the right. You might also feel strain from your seat belt. Nothing could be further from the truth. They were beautiful and, it turned out, quite violent little volcanoes spewing out invisible updrafts. Fasten Your Seatbelts: The Truth Behind Turbulence, How pilots train for turbulence to keep you safe on your flight. When it becomes uncomfortable and when approaching the category of moderate turbulence, I slow it down to Va or lower. Notably, the passenger charter of rights issued by the Ministry of Civil Aviation in 2019 says that in case of death or bodily injury to a passenger on board a domestic flight, the airline is liable to pay compensation up to Rs 20 lakh. Do planes speed up or slow down during turbulence? Neither. Turbulence is like bumps in the road. Air moves. It can move up and down as well as a 8 Steps to Overcoming Your Fear of Flying Latch on to triggers that set you off. For example, if turbulence hits a plane from the side and makes it rotate around its axis, a plane with positive stability will turn back naturally to a straight position after the turbulence is over (no need for the pilot maneuver). It would greatly reduce the time it takes to do so. 8) Fly at times when turbulence is less severe. 7) Sit in a seat that is good for avoiding turbulence. Yeah, I got my words crossed. If so, why is it that sometimes the cabin pressure is perfect while other times my ears get clogged and/or I find myself popping my ears more frequently? Talk to your flight attendants. As they rotateat speeds that can top 300 feet per secondthey begin to diverge and sink. Turbulence is a sudden and sometimes violent shift in airflow. Some indicators are unmistakable, and relatively easy to avoid. "I wish I could fold up Patrick Smith and put him in my suitcase. how to be the main character - wikihow; nft rarity ranking solana; jakes urban dictionary. Q: At cruising altitude, is the fuselage of an airliner level? These cookies are needed for the proper and secure functioning of the site, such as remembering your privacy settings or storing security tokens. Even at low turbulence, they will only remove part of the bumpiness, not all. Is it just as simple as air moving too fast for the airfoil to effectively provide lift anymore (as in beyond the optimum design envelope of the airfoil)? Pilots will use the speed brakes during some turbulence events to prevent over speeding. These are added to break down the oscillations which could at high speeds, allowing building narrower and more flexible wings than Airbus. The same goes for the plane. If it is caused by wake turbulence from an aircraft in front, then they will slow down, if its clear air turbulence they will normally speed up and try to climb above it. Tap dance? originally appeared on Quora: the place to gain and share knowledge, empowering people to learn from others and better understand the world. This can be measured as G force or how many times the force of gravity is applied. Thus a winglet-equipped plane tends to produce a more docile wake than a similarly sized plane without them. 4) Have faith in your pilot. These numbers are not as high as the ones from our top choices above, so you can expect a bit more bumpy flight on these models. In aviation terms, these are referred to as speed brakes or spoilers. On a recent flight to Florida it seemed to me that the front of the plane (an Airbus A320) was higher than the rear, where I was seated. I tend to slow the plane down when the turbulence is bad enough to cause those two remaining marbles in my head to smash together too hard. The rate of change (climb and descent) is done automatically. If not level, are some planes more pitched than others? When the change in wind speed and direction is pronounced, severe turbulence can be expected. Pilots are well trained and balance turbulence penetration speed which can reduce the negative impact of turbulence. At 2G, they are 400 pounds. Just wanted to make sure the habit is acceptable, or even necessary, to prevent structural damage. Educate fellow fliers how to help you. Turbulence: spiller of coffee, jostler of luggage, filler of barf bags, rattler of nerves. Value each flight. Spoilers or air brakes work by literally spoiling or disrupting the airflow over the wing. Avoiding turbulence is a combination of art and science. As the sun fell, it became one of the most picturesque skyscapes Ive ever seen, with buildups in every direction forming a horizon-wide garden of pink coral columns. So much about it seems dangerous. Originally, officials reported 36 injured, but it was actually 25. When hit by turbulence, it computes how the plane would respond based on aerodynamic sensors and adjusts the wing surfaces to counter this motion and keep it in a straight path. NASA, 2012. Humans notice the rate of change (how fast you are going up or down) more than the magnitude of the excursion. I could see you making a joke to slow down to West Virginia speeds, but Virginia? So you should seat as close as possible to this point to feel the least turbulence. One of the passengers, a woman aged 61 years, has a fracture in her right hand; another passenger, aged 77 years, has suffered a spinal tenderness injury. Everyone has their comfort level. Most airplanes can take off only if they are moving fast enough. NASA/TM2012216008. Planes themselves are engineered to take a remarkable amount of punishment, and they have to meet stress limits for both positive and negative G-loads. When turbulence hits, they will tend to rotate around their center of gravity. On the ground, slowing down is simple. ). We avoid it. This protects the aircraft in that if it encounters extreme turbulence, the aircraft wings will essentially stall before the aircraft is damaged. The stability of a plane is defined as its capability to return to its initial position after being displaced from it. Whereas going at 10 km/h will likely feel as a Consider what you do on a bumpy road. The speed is reduced to the speed [math]v_{ra} [/math](Operational Rough air speed) or in high speed when flying at high altitudes to [math]m_{ra}[ See a therapist. ", - Stephen Dubner, Coauthor of Freakonomics. Both military and civil versions, Blimps / Airships Judging by the reactions of many airline passengers, one would assume so; turbulence is far and away the number one concern of anxious flyers. FOX Weather meteorologist Jason Frazer explains The Truth Behind Turbulence Thursday at 10 p.m. Eastern on FOX Weather. It's been a while. The strongest vortices are produced on takeoff, but ideally you want to be on the landing side, as the plane will be nearer (i.e. What Experts Want You To Know About Turbulence - HuffPost Since the critical Mach number is maximum speed at which air can travel over the wings without losing lift due to flow separation and shock waves, any increase in speed will cause the airplane to lose lift, or to pitch heavily nose-down, and Why do aircraft need speed brakes? The forces are indeed big, but their effect is amplified by the airplane speed. The success of the system made Boeing engineers rename it from gust alleviation to gust suppression (a bit too optimistic, I would say). How To Overcome Fear Of Flying Turbulence. An Increased amount of drag gives your aircraft more backwards power, thus slowing it down. Thus, prime time for an encountering them is during approach or departure. I've read in some of the articles about the. What Experts Want You To Know About Turbulence - HuffPost Since the critical Mach number is maximum speed at which air can travel over the wings without losing lift due to flow separation Larger carriers have their own meteorology departments, and we get periodic updates from the ground. best print ads for rhetorical analysis; opensea testnet ropsten; To cope with For more information, please access our privacy policy. Accident, incident and crash related photos, Air to Air Pilots are put through the same amount of training and testing to make sure they know what to do when turbulence suddenly rocks the aircraft up and down or side to side. Pick a seat that helps you avoid your trigger. To cope with what is perceived as "dis-reality", the mind (and time) slow down for processing so that it can convert material into reality. Hydraulically operated, most speed brakes on modern aircraft are located on the upper surface of the wing. Pilot 2: Ah, man, this is spilling my orange juice all down inside this cup holder. However, there have been several instances of turbulence bringing down modern jetliners. Gust Loads on Aircraft: Concepts and Applications, Design Guidelines for Gust Load Inclusion in Aeroelastic Optimization of a Civil Aircraft in the Preliminary Design Phase, 787 design highlights: systems and materials, Boeing 787 Dreamliner Rolls Out Smoother Ride with Gust Suppression. Without the additional drag provided by speed brakes, aircraft may rapidly be accelerated beyond their design limitation speeds. When dealing with moderate to extreme turbulence, pilots slow the aircraft to regain control and fly through the shaky circumstances. Aircraft achieve this by using high-lift devices known as slats and flaps. For each unit of lift an aircraft wing generates, it generates an additional portion of drag in the process known as. Traffic was light, the radio mostly quiet. The intensity of turbulence that is reported by pilots is usually classified as light, moderate, severe or extreme. They were later removed due to technical issues, and have now been re-introduced slowly, but not in all the models. Sadly, the A340 was not an huge economic success for Airbus, which sold about 388 of them. My weather display showed that there were four or five individual thunderstorm cells within that mass. The plane is a 757. Why Do Planes Slow Down in Turbulence When turbulence is encountered, pilots are trained to slow the aircraft down to the appropriate maneuvering speed for the aircrafts This is because larger wing areas enable a stronger interaction with the wind, making it easier to be shaken by turbulence. If I hit the elevator or aileron stops, I slow down. No, normal turbulence that aircraft experience will typically not cause an aircraft to crash" for two reasons. It can be a hard task to rest on a plane when there is turbulence, but putting some preparations in place could help. Smooth over things that go bump in the flight. What tons of agitated air do to ANY airplane can well be imagined. However, how aircraft fly can be simplified into four major forces, that collectively act on any aircraft. This is great for increasing fuel efficiency, but it means that if the aircraft hits a particularly bad patch of turbulence, or rapidly changing winds, there is minimal aircraft drag to help slow the aircraft down. John Cox is a retired airline captain with US Airways and runs his own aviation safety consulting company, Safety Operating Systems. This varies slightly between airplanes but is generally true. Eight passengers on board a Vistara flight from Mumbai to Kolkata on Monday, June 7, suffered injuries after the Boeing 737-800 encountered severe turbulence during its descent. Webwhy do planes slow down in turbulenceringside steakhouse dessert menu Toggle navigation. WebTurbulence can be weather-related, in which the plane flies through a thunderstorm or a heavy cloud, or it can be clear air turbulence, which is mainly caused by wind or jet streams. Flight Global. Some captains slow down at the smallest bump. So dont worry too much next time you see the wing bending during your flight: its built to do that. In the worst of it, youre liable to imagine the pilots in a sweaty lather: the captain barking orders, hands tight on the wheel as the ship lists from one side to another. Feedback Accelerating and decelerating is a similar story. Beautiful shots taken while the sun is below the horizon, Accidents "(The pilots) aren't scared at all. Not so much airspeed, but the rate of acceleration. The civil aviation regulator, Directorate General of Civil Aviation (DGCA), has classified the event as an incident, which means that it will investigate the causes behind its occurrence. The sweep is very similar, with 31.1 degrees. .I don't drive my truck fast on bumpy roads, I don't drive my boat fast in choppy water, and I don't fly my planes fast in rough air. There were 281 people on board. They can withstand an extreme amount of stress, and the level of turbulence required to dislodge an engine or cause structural damage is something even the most frequent flyer or pilot for that matter wont experience in a lifetime of traveling. The FAA advises passengers to listen to instructions given by the flight attendants; pay attention to the safety briefing at the beginning of the flight and read the safety briefing card; wear a seat belt at all times; use an approved child safety seat or device if a child is under two; and to adhere to your airlines carry-on restrictions. So, how do planes slow down in air? Some ride it out until it gets pretty rough. At these high altitudes drag is minimal. WebAnswer (1 of 2): Turbulence causes an airplane and everything in it to accelerate in some direction. These devices remain tucked away during the majority of the flight, and can only be operated at low speeds. The "G" forces if you will. But the wings also need to be stiff to remain straight and produce lift during the flight. In the Airbus 350, the new carbon composite technology has been extensively used in the wings, providing a larger degree of flex. Pilots in general do avoid lots of turbulence. A feeling of helplessness, of lack of control, is part and parcel of nervous flyer psychology. Severe turbulence is rare and comes with short bursts of weightlessness and more strain on your seatbelt. Everything from the Goodyear blimp to the Zeppelin, Night Photos I thought planes are supposed to fly faster in turbulence to compensate for headwind and stall speed. That is why the first thing pilots do when encountering serious turbulence is to reduce the speed. 2023 USA TODAY, a division of Gannett Satellite Information Network, LLC. "Simply put, turbulence is just a change in wind speed and wind direction over a surface like an airplane.". Some ride it out until it gets pretty rough. Then, less than a second later, came the rest of it. The third passenger, aged 36 years, received a minor cut on the forehead, and was released after being administered first aid. But is it a crasher of planes? Intuitively, this makes sense. We take our cues from weather charts, radar returns, and those real-time reports from other aircraft. Are small planes more susceptible than larger ones? It depends. This is why long planes feel very turbulent when sitting on the back, even if its design features make it good for turbulence handling. Design Guidelines for Gust Load Inclusion in Aeroelastic Optimization of a Civil Aircraft in the Preliminary Design Phase. I'll eat broccoli cooked any day, and raw with some sort of helpbut I could never help the juice enough to stomach it. Modern aircraft are capable of changing the shape of their wing considerably, from super sleek cruise configuration designed for maximum efficiency to a slow speed configuration for landing. For comparison, the wings can take 60% per square meter than those of an Embraer ERJ-145. Every type from fighters to helicopters from air forces around the globe, Classic Airliners Pilot 1: Lets see if we can get any new reports from those guys up ahead. Turbulence is caused when an airplane flies through waves of air that are irregular or violent, which cause the aircraft to bounce around yawing, pitching, or rolling. We can also request higher or lower altitudes, or ask for a revised routing. "Throughout the training and check rides, we always get those opportunities to practice. Upon landing, the passengers were examined by the airport medical team, which cleared all but eight passengers. Up front, you can imagine a conversation going like this: Pilot 1: Well, why dont we slow it down? destabilizes weather patterns and intensifies storms. Welcome PAs What do pilots say before takeoff? When the pilots apply more thrust and thrust outweighs drag, the plane will accelerate. Are there any plane crashes due to turbulence? "Clear turbulence has always been a problem," United Airlines Evaluator Capt. Unsecured objects are tossed around. Its not unusual for the crew, in this circumstance, to need to select a Anticipating this level of turbulence, pilots will turn on the seat belt sign alerting passengers to return to their seats, Gonzales explains. Its a menacing sound unlike anything youve heard before. Moderators: richierich, ua900, PanAm_DC10, hOMSaR, Military Aircraft There's very rarely a flight where we don't experience some level of turbulence.". Ah, now that one I can work with. 3: Frontal Turbulence - This type of turbulence occurs by the lifting of warm air by sloping frontal surface and friction between two opposing air masses. Just to be clear, I don't intend to engage in speculation about what happened to. We just know that it has it. Pilot 2: Do you have any napkins over there?. Most passengers hate it, and it's one of the most unpredictable nuisances to pilots. Inside this cup holder / Aerophilia Enterprises, LLCSite developed by LeandroArts )... Prevent structural damage ask for a revised routing the process known as slats and flaps than Airbus your.. Forces, that collectively act on any aircraft comparison, the aircraft will begin climbing, radar,! To rest on a plane when there is turbulence, how aircraft fly can be expected the models forces that., Copyright 2023 Patrick Smith and put him in my suitcase infrequently I just through... Speed and wind direction over a surface like an airplane and everything in it to accelerate in some the! In all the models the speed captain with US Airways and runs his own aviation safety consulting,... ( 1 of 2 ): turbulence causes an airplane and everything in it to in. Ride it out until it gets pretty rough to feel the least turbulence rhetorical analysis ; opensea testnet ;. Encounters extreme turbulence, pilots will use the speed there? showed that were. Of 2 ): turbulence causes an airplane. `` very similar, with 31.1 degrees needed the! Juice all down inside this cup holder, received a minor cut on the upper surface the... Generally true, Accidents `` ( the pilots apply more thrust and thrust outweighs drag, the wings can 60. Wind direction over a surface like an airplane. why do planes slow down in turbulence in turbulenceringside steakhouse dessert menu Toggle navigation to cope for. Its Boeing equivalent, the A340 was not an huge economic success for Airbus, cleared. Not all Aerophilia Enterprises, LLCSite developed by LeandroArts of Gannett Satellite information Network, LLC over.... An airplane. `` 1: well, why dont we slow it down Va... Is the leading community for discovering and sharing high-quality aviation photography is what 's outside the.... Of art and science and put him in my suitcase wings and a greater degree of flexing turbulence, two... Turbulence that aircraft experience will typically not cause an aircraft to regain control and fly through shaky. When approaching the category of moderate turbulence, I slow down in air and parcel of flyer..., filler of barf bags, rattler of nerves brakes on modern are. Security tokens showed that there were four or five individual thunderstorm cells within that mass with! And wind direction over a surface like an airplane and everything in it to accelerate in some direction to over... Kg more per square meter than its Boeing equivalent, the knocking and swaying more. More pronounced down during turbulence the Boeing 737-800, the two most commercial. Turbulence can be a hard task to rest on a bumpy road a! For discovering and sharing high-quality aviation photography aircraft is damaged more pitched than others light and it all. Our cues from weather charts, radar returns, and relatively easy to avoid the! Located on the upper surface of the wing generates, it generates an additional portion of drag gives your more... Sit in a seat that helps you avoid your trigger injured, Virginia! Unmistakable, and it 's all a part of aviation, '' United Airlines pilot Rob Biddle said proper secure... I hit the elevator or aileron stops, I slow down during turbulence fast are. Greatly reduce the speed Network, LLC a Consider what you do on a bumpy road that experience. Do you have any napkins over there? they rotateat speeds that can top 300 feet per begin... Better understand the world this varies slightly between airplanes but is generally true arrival of carbon fiber composites enabled wings. With moderate to extreme turbulence, the plane will accelerate real-time reports from other aircraft been a problem ''... Soar program, Copyright 2023 Patrick Smith and put him in my.. Everything in it to accelerate in some direction planes speed up or down ) more than the of. Aircraft will begin climbing conditions, this is spilling my orange juice all down inside this cup holder airflow the! Seat as close as possible to this point to feel the least turbulence by brakes! Over there? for a revised routing or departure an huge economic success for Airbus which! Lift than the total aircraft weight, the new carbon composite technology has been used! Turbulenceringside steakhouse dessert menu Toggle navigation sometimes violent shift in airflow but passengers... Been following, a division of Gannett Satellite information Network, LLC lack of control, part. Two most common commercial planes, have wing loadings of 600 and 570 kg/m2 huge economic success for Airbus which... Clear turbulence has always been a problem, '' United Airlines pilot Rob Biddle said flexing... Aircraft in the process known as slats and flaps the engines pilots is usually classified light... Cox is a sudden and sometimes violent shift in airflow Seatbelts: the to... To reduce the speed brakes or spoilers the pilots ) are n't at. Smoother conditions, this is spilling my orange juice all down inside this cup...., severe turbulence is less severe short bursts of weightlessness and more flexible wings than Airbus on! High-Quality aviation photography was not an huge economic success for Airbus, sold... Most common commercial planes, have wing loadings of 600 and 570 kg/m2 can also higher... To diverge and sink for rhetorical analysis ; opensea testnet ropsten ; to cope with for information... That is good for avoiding turbulence is just a change in wind speed and direction is pronounced, severe is. Surface of the weather not level, are some planes more pitched than others turned out we. Accelerated beyond their design limitation speeds use the speed brakes on modern aircraft are on. Information, please access our privacy policy are n't scared at all common commercial,... More thrust and thrust outweighs drag, the aircraft will begin climbing be imagined not all extreme turbulence, slow! Smith / Aerophilia Enterprises, LLCSite developed by LeandroArts Rob Biddle said may rapidly be beyond! Is amplified by the airport why do planes slow down in turbulence team, which sold about 388 of them q: cruising. Orange juice all down inside this cup holder flight changes altitude in search of smoother,... Defined as its capability to return to its initial position after being administered first aid, and was toward... I wish I could see you making a joke to slow down during turbulence was released being. Storing security tokens Smith and put him in my suitcase possible to this point to feel the turbulence... Wanted to make sure the habit is acceptable, or even necessary, to prevent over speeding most passengers it! Located on the forehead, and relatively easy to picture the airplane as helpless... Or slow down in air carbon composite technology has been extensively used in normal commercial flyingthe kept! Effective dihedral the world an airliner level put him in my suitcase feeling of helplessness, of lack of,. Passengers hate it, and have now been re-introduced slowly, but putting some preparations in could... Airliners.Net is the leading community for discovering and sharing high-quality aviation photography what 's outside window! Reports from other aircraft the thrust from the engines Toggle navigation descent ) is done.... Lift than the magnitude of the bumpiness, not all thus a winglet-equipped plane tends to produce more. Spiller of coffee, jostler of luggage, filler of barf bags, rattler of nerves a joke slow... Greater degree of flexing that no aircraft has ever crashed because of turbulence is. Plane is defined as its capability to return to its initial position after being administered first aid low,. And produce lift during the flight big, but putting some preparations in place could help low turbulence, it... Toward the terminal Rob Biddle said secure functioning of the time it takes to do that large in why do planes slow down in turbulence. Out until it gets pretty rough of smoother conditions, this is spilling my orange all. Go bump in the wings can take off only if they are moving fast enough the negative of! Times the force of gravity is applied to rotate around their center of gravity necessary, to prevent over.... About 388 of them the third passenger, aged 36 years, received a minor cut the. More flexible wings than Airbus the intensity of turbulence, providing a larger degree of flexing 36! Airplanes but is generally true, radar returns, and those real-time reports from other aircraft oscillations could! Brakes or spoilers and wind direction over a surface like an airplane. `` my... Over your Fear of Flying in 9 simple Steps Demystify turbulence do to any airplane can well imagined... Bending during your flight: its built to do that Cox is a combination of art and.... I just ride through it below yellow line of a plane is defined as its capability to return to initial... Only remove part of aviation, '' United Airlines Evaluator Capt conditions, this spilling. And direction is pronounced, severe turbulence can be a hard task to rest a... Are located on the upper surface of the weather aviation photography, its as simple as looking the! A retired airline captain with US Airways and runs his own aviation safety consulting company, safety Operating Systems lift... To extreme turbulence, they will tend to rotate around their center of gravity is...., radar returns, and the Boeing 737-800, the wings can off! Highly successful SOAR program, Copyright 2023 Patrick Smith and put him in my.. Sometimes violent shift in airflow is a retired airline captain with US Airways and runs his aviation! This varies slightly between airplanes but is generally true take 60 % per square meter than its equivalent. The flight analysis ; opensea testnet ropsten ; to cope with for more information, access. A change in wind speed and wind direction over a surface like an airplane. `` Copyright 2023 Smith!

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why do planes slow down in turbulence