Why 757 wake turbulence?

The 757 features a very efficient supercritical wing, which, during certain brief periods of flight during takeoff or landing, can produce a wake vortex stronger than that of a much larger Boeing 747 jumbo jet. Therefore, the [required] separation is longer than [for] other narrow-bodied airliners.



The Boeing 757 is notorious in the aviation world for producing "heavy" wake turbulence despite being classified as a "large" (but not "heavy") aircraft. This phenomenon is primarily due to its unique wing design and high power-to-weight ratio. The 757 was developed alongside the wide-body 767 and shares much of its high-lift wing technology; however, when applied to the 757’s narrower and lighter frame, the resulting wingtip vortices are unusually powerful and persistent. These vortices behave more like those from a much larger wide-body jet, often staying in the air longer than expected. Because of several incidents in the 1990s where smaller planes were "flipped" by 757 wakes, air traffic controllers in 2026 still treat the 757 with special separation rules, often requiring the same distance behind it as a Boeing 747 or an Airbus A380 to ensure the safety of trailing aircraft.

People Also Ask

Why does 757 have bad wake turbulence? While tests on the 757 are under way, those in the industry speculate that the aircraft's unique wing design may be the biggest reason it produces so much more turbulence than other planes its size.

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However, the vortex strength from an aircraft increases proportionately to an increase in operating weight or a decrease in aircraft speed. Since the turbulence from a “dirty” aircraft configuration hastens wake decay, the greatest vortex strength occurs when the generating aircraft is HEAVY, CLEAN, and SLOW.

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A: The 757 is one of my favorite airplanes. The lines are beautiful, and the performance is unmatched by other airliners. It has a higher thrust-to-weight ratio, resulting in spectacular climb performance.

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Essentially, the 757 is a stretched 737 with a higher range and passenger capacity. The key difference really is that all the 757 variants are capable of flying transatlantic routes, whereas only the longest range 737 variant can do the same.

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Pilots know that flying safely in threatening turbulence requires slowing to VA, the maneuvering speed. This assures that the airplane will stall before its limit load factor can be exceeded. Such a stall is momentary and protects the structure against damaging loads.

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According to the FAA, vortices descend at an initial rate of about 300 to 500 feet per minute for about 30 seconds. The descent rate decreases and eventually approaches zero between 500 and 900 feet below the flightpath. Flying at or above the flightpath always provides the best method for avoidance.

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1 Unmatched power for its size Many pilots call the 757 a sports car in the sky, and for good reason. The Boeing 757 was engineered with powerful engines considering its size. The Boeing 757 offered two engine choices: the Rolls-Royce RB211-535C high-bypass turbofan engines and the Pratt & Whitney PW2037 engines.

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Turbulence is a sudden and sometimes violent shift in airflow. Those irregular motions in the atmosphere create air currents that can cause passengers on an airplane to experience annoying bumps during a flight, or it can be severe enough to throw an airplane out of control. (The pilots) aren't scared at all.

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Airplanes are built very sturdily. In fact, there's a lot of countermeasures built into the engineering of an airplane much like a car has different things to make a smooth ride on a bumpy road, airplanes have so many parts to it that's built into the aircraft to be able to deal with and safely handle the turbulence.

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Turbulence, associated with thunderstorms, can be extremely hazardous, having the potential to cause overstressing of the aircraft or loss of control. Thunderstorm vertical currents may be strong enough to displace an aircraft up or down vertically as much as 2000 to 6000 feet.

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Sometimes it's unavoidable to fly through light and moderate turbulence, but rest assured your pilots are working to find smooth air. If they encounter severe or extreme turbulence not forecasted, pilots will quickly climb or descend to a safe and smooth altitude.”

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The short answer is no, and rest assured that the pilots know how uncomfortable turbulence can make passengers feel. And know that no aircraft has ever crashed because of turbulence. Turbulence has not caused an airplane to crash, Biddle said. Airplanes are built very sturdily.

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While no aircraft can avoid turbulence, passengers may feel less turbulence in widebody aircrafts, as they're larger and heavier airplanes.

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Airports with highest turbulence
Severe turbulence from mountain waves tends to be stronger than from jet streams, also contributing to a higher average value. The most turbulent airport of 2022: Xigazê, Tibet.

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Can you tell your 737 from a 757? There's a good reason to keep an eye on your aircraft's model number. While they're all pretty much equally safe and every airline makes its own choice of interiors, airplanes vary in age and comfort.

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Delta operates the largest 757 fleet in the world since July 2007, when American Airlines retired its ex-TWA 757s. In 1996, Delta acquired four Boeing 757-212 aircraft: N750AT, N751AT, N752AT and N757AT (Ships 6901-6904).

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December 17, 2020. Travelers flying United 757-200s tend to have different reactions depending on their expectations. Those flying the plane on a long-haul route like across the Atlantic are often left less-than-impressed, as these single aisle narrowbody planes just don't feel as comfortable as larger widebodies.

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