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Stall (fluid mechanics)

Index Stall (fluid mechanics)

In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack increases. [1]

118 relations: Adverse yaw, Aerobatics, Aerodynamics, Aeroelasticity, Aileron, Air France Flight 447, Airbus A330, Airbus A400M Atlas, Aircraft, Aircraft flight control system, Aircraft principal axes, Airfoil, Airspeed, Airspeed indicator, Angle of attack, Armstrong Flight Research Center, Aspect ratio (aeronautics), Atmospheric icing, Autogyro, Autorotation (fixed-wing aircraft), Aviation, Aviation safety, Avro Canada CF-105 Arrow, BAC One-Eleven, Ballistic parachute, Banked turn, Boeing 727, Bombardier Challenger 600 series, Bombardier CRJ200, Boundary layer, British European Airways Flight 548, Bumblebee, Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile, Business jet, Buzzer, Camber (aerodynamics), Canard (aeronautics), Center of mass, Centripetal force, Chord (aeronautics), Coffin corner (aerodynamics), Colgan Air Flight 3407, Compressor stall, Departure resistance, Drag (physics), Federal Aviation Administration, Fixed-wing aircraft, Flap (aeronautics), Flight dynamics (fixed-wing aircraft), Flow separation, ..., Fluid dynamics, Flying (magazine), Foil (fluid mechanics), Glenn Research Center, Glider (aircraft), Gloster Javelin, Grumman F-14 Tomcat, Handley Page Victor, Hawker Siddeley Trident, Helicopter, Indonesia AirAsia Flight 8501, Juan de la Cierva, Landing gear, Langley Research Center, Laurence Joseph Clancy, Leading edge, Leading-edge extension, Lift (force), Lift coefficient, Light aircraft, Load factor (aeronautics), Lockheed Martin F-22 Raptor, Lockheed NF-104A, McDonnell Douglas DC-9, McDonnell Douglas F-4 Phantom II, Momentum, NASA, Northwest Airlines Flight 6231, Otto Lilienthal, Pitch-up, Post stall, Pressure, Propeller (aeronautics), Pugachev's Cobra, Reynolds number, Rockwell-MBB X-31, Schweizer SGS 1-36 Sprite, Sensor, Spin (aerodynamics), Spoiler (aeronautics), Stabilator, Stall strips, Stick pusher, Stick shaker, Supermaneuverability, Swept wing, Switch, T-tail, Thrust vectoring, Trigonometric functions, Turkish Airlines Flight 1951, United Kingdom military aircraft serial numbers, V speeds, Velocity XL, Vortex, Vortex generator, Washout (aeronautics), Weight, West Caribbean Airways Flight 708, Wind tunnel, Wing configuration, Wing fence, Wing root, Wing twist, Wright brothers, 1963 BAC One-Eleven test crash, 1966 Felthorpe Trident crash, 1994 Fairchild Air Force Base B-52 crash. Expand index (68 more) »

Adverse yaw

Adverse yaw is the natural and undesirable tendency for an aircraft to yaw in the opposite direction of a roll.

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Aerobatics

Aerobatics (a portmanteau of aerial-acrobatics) is the practice of flying maneuvers involving aircraft attitudes that are not used in normal flight.

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Aerodynamics

Aerodynamics, from Greek ἀήρ aer (air) + δυναμική (dynamics), is the study of the motion of air, particularly its interaction with a solid object, such as an airplane wing.

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Aeroelasticity

Aeroelasticity is the branch of physics and engineering that studies the interactions between the inertial, elastic, and aerodynamic forces that occur when an elastic body is exposed to a fluid flow.

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Aileron

An aileron (French for "little wing" or "fin") is a hinged flight control surface usually forming part of the trailing edge of each wing of a fixed-wing aircraft.

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Air France Flight 447

Air France Flight 447 (AF447/AFR447) was a scheduled passenger international flight from Rio de Janeiro, Brazil to Paris, France, which crashed on 1 June 2009.

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Airbus A330

The Airbus A330 is a medium- to long-range wide-body twin-engine jet airliner made by Airbus.

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Airbus A400M Atlas

The Airbus A400M Atlas Airbus Military, 6 July 2012.

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Aircraft

An aircraft is a machine that is able to fly by gaining support from the air.

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Aircraft flight control system

A conventional fixed-wing aircraft flight control system consists of flight control surfaces, the respective cockpit controls, connecting linkages, and the necessary operating mechanisms to control an aircraft's direction in flight.

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Aircraft principal axes

An aircraft in flight is free to rotate in three dimensions: yaw, nose left or right about an axis running up and down; pitch, nose up or down about an axis running from wing to wing; and roll, rotation about an axis running from nose to tail.

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Airfoil

An airfoil (American English) or aerofoil (British English) is the shape of a wing, blade (of a propeller, rotor, or turbine), or sail (as seen in cross-section).

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Airspeed

Airspeed is the speed of an aircraft relative to the air.

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Airspeed indicator

The airspeed indicator or airspeed gauge is an instrument used in an aircraft to display the craft's airspeed, typically in knots, to the pilot.

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Angle of attack

In fluid dynamics, angle of attack (AOA, or \alpha (Greek letter alpha)) is the angle between a reference line on a body (often the chord line of an airfoil) and the vector representing the relative motion between the body and the fluid through which it is moving.

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Armstrong Flight Research Center

The NASA, Neil A. Armstrong Flight Research Center (AFRC) is an aeronautical research center operated by NASA.

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Aspect ratio (aeronautics)

In aeronautics, the aspect ratio of a wing is the ratio of its span to its mean chord.

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Atmospheric icing

Atmospheric icing occurs when water droplets in the atmosphere freeze on objects they contact.

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Autogyro

An autogyro (from Greek αὐτός and γύρος, "self-turning"), also known as a gyroplane or gyrocopter, is a type of rotorcraft that uses an unpowered rotor in free autorotation to develop lift.

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Autorotation (fixed-wing aircraft)

For fixed-wing aircraft, autorotation is the tendency of an aircraft in or near a stall to roll spontaneously to the right or left, leading to a spin (a state of continuous autorotation).

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Aviation

Aviation, or air transport, refers to the activities surrounding mechanical flight and the aircraft industry.

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Aviation safety

Aviation safety means the state of an aviation system or organization in which risks associated with aviation activities, related to, or in direct support of the operation of aircraft, are reduced and controlled to an acceptable level.

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Avro Canada CF-105 Arrow

The Avro Canada CF-105 Arrow, often known simply as the Avro Arrow, was a delta-winged interceptor aircraft designed and built by Avro Canada.

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BAC One-Eleven

The British Aircraft Corporation One-Eleven, also known as the BAC-111 or BAC 1-11, is a British short-range jet airliner used during the 1960s and 1970s.

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Ballistic parachute

A ballistic parachute, ballistic reserve parachute, or emergency ballistic reserve parachute, is a parachute ejected from its casing by a small explosion, much like that used in an ejection seat.

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Banked turn

A banked turn (or banking turn) is a turn or change of direction in which the vehicle banks or inclines, usually towards the inside of the turn.

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Boeing 727

The Boeing 727 is a midsized, narrow-body three-engined jet aircraft built by Boeing Commercial Airplanes from the early 1960s to 1984.

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Bombardier Challenger 600 series

The Bombardier Challenger 600 series is a family of business jets.

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Bombardier CRJ200

The Bombardier CRJ100 and CRJ200 (formerly known as the Canadair CRJ100 and CRJ200) are a family of regional airliners designed and manufactured by Bombardier.

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Boundary layer

In physics and fluid mechanics, a boundary layer is an important concept and refers to the layer of fluid in the immediate vicinity of a bounding surface where the effects of viscosity are significant.

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British European Airways Flight 548

British European Airways Flight 548 was a scheduled passenger flight from London Heathrow to Brussels that crashed near the town of Staines, England, soon after take-off on 18 June 1972, killing all 118 people on board.

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Bumblebee

A bumblebee (or bumble bee, bumble-bee or humble-bee) is any of over 250 species in the genus Bombus, part of Apidae, one of the bee families.

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Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile

The Bureau of Enquiry and Analysis for Civil Aviation Safety (BEA, French: Bureau d'Enquêtes et d'Analyses pour la sécurité de l'aviation civile) is an agency of the French government, responsible for investigating aviation accidents and incidents and making safety recommendations based on what is learned from those investigations.

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Business jet

A business jet, private jet, or bizjet, or simply B.J., is a jet aircraft designed for transporting small groups of people.

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Buzzer

A buzzer or beeper is an audio signalling device, which may be mechanical, electromechanical, or piezoelectric (piezo for short).

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Camber (aerodynamics)

In aeronautics and aeronautical engineering, camber is the asymmetry between the two acting surfaces of an aerofoil, with the top surface of a wing (or correspondingly the front surface of a propeller blade) commonly being more convex (positive camber).

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Canard (aeronautics)

A canard is an aeronautical arrangement wherein a small forewing or foreplane is placed forward of the main wing of a fixed-wing aircraft.

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Center of mass

In physics, the center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero, or the point where if a force is applied it moves in the direction of the force without rotating.

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Centripetal force

A centripetal force (from Latin centrum, "center" and petere, "to seek") is a force that makes a body follow a curved path.

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Chord (aeronautics)

In aeronautics, chord refers to the imaginary straight line joining the leading and trailing edges of an aerofoil.

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Coffin corner (aerodynamics)

Coffin corner (also known as the aerodynamic ceiling or Q corner) is the region of flight where a fast fixed-wing aircraft's stall speed is near the critical Mach number, at a given gross weight and G-force loading.

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Colgan Air Flight 3407

Colgan Air Flight 3407, marketed as Continental Connection under a codeshare agreement with Continental Airlines, was a scheduled passenger flight from Newark, New Jersey, to Buffalo, New York, which crashed on February 12, 2009.

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Compressor stall

A compressor stall is a local disruption of the airflow in a gas turbine or turbocharger compressor.

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Departure resistance

Departure resistance is a quality of an aircraft which enables it to remain in controlled flight and resist entering potentially dangerous less-controlled maneuvers such as spin.

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Drag (physics)

In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid.

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Federal Aviation Administration

The Federal Aviation Administration (FAA) of the United States is a national authority with powers to regulate all aspects of civil aviation.

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Fixed-wing aircraft

A fixed-wing aircraft is an aircraft, such as an airplane or aeroplane (note the two different spellings), which is capable of flight using wings that generate lift caused by the vehicle's forward airspeed and the shape of the wings.

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Flap (aeronautics)

Flaps are a type of high-lift device used to increase the lift of an aircraft wing at a given airspeed.

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Flight dynamics (fixed-wing aircraft)

Flight dynamics is the science of air vehicle orientation and control in three dimensions.

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Flow separation

All solid objects traveling through a fluid (or alternatively a stationary object exposed to a moving fluid) acquire a boundary layer of fluid around them where viscous forces occur in the layer of fluid close to the solid surface.

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Fluid dynamics

In physics and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids - liquids and gases.

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Flying (magazine)

Flying, sometimes styled FLYING, is an aviation magazine published since 1927 and originally called ''Popular Aviation'' prior to 1942, as well as Aeronautics for a brief period.

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Foil (fluid mechanics)

A foil is a solid object with a shape such that when placed in a moving fluid at a suitable angle of attack the lift (force generated perpendicular to the fluid flow) is substantially larger than the drag (force generated parallel to the fluid flow).

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Glenn Research Center

NASA John H. Glenn Research Center at Lewis Field is a NASA center, located within the cities of Brook Park and Cleveland between Cleveland Hopkins International Airport and the Rocky River Reservation of Cleveland Metroparks, with a subsidiary facility in Sandusky, Ohio.

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Glider (aircraft)

A glider is a heavier-than-air aircraft that is supported in flight by the dynamic reaction of the air against its lifting surfaces, and whose free flight does not depend on an engine.

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Gloster Javelin

The Gloster Javelin is a twin-engined T-tailed delta-wing subsonic night and all-weather interceptor aircraft that served with Britain's Royal Air Force from the mid-1950s until the late 1960s.

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Grumman F-14 Tomcat

The Grumman F-14 Tomcat is an American supersonic, twin-engine, two-seat, twin-tail, variable-sweep wing fighter aircraft.

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Handley Page Victor

The Handley Page Victor was a British jet-powered strategic bomber, developed and produced by the Handley Page Aircraft Company, which served during the Cold War.

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Hawker Siddeley Trident

The Hawker Siddeley HS 121 Trident (originally the de Havilland D.H.121 and the Airco DH 121) was a British short- (and later medium-) range airliner.

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Helicopter

A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors.

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Indonesia AirAsia Flight 8501

Indonesia AirAsia Flight 8501 (QZ8501/AWQ8501) was a scheduled international passenger flight, operated by AirAsia Group affiliate Indonesia AirAsia, from Surabaya, Indonesia, to Singapore.

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Juan de la Cierva

Juan de la Cierva y Codorníu, 1st Count of De La Cierva (21 September 1895 in Murcia, Spain – 9 December 1936 in Croydon, United Kingdom) was a Spanish civil engineer, pilot and aeronautical engineer.

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Landing gear

Landing gear is the undercarriage of an aircraft or spacecraft and may be used for either takeoff or landing.

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Langley Research Center

Langley Research Center (LaRC or NASA Langley) located in Hampton, Virginia, United States, is the oldest of NASA's field centers.

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Laurence Joseph Clancy

Laurence Joseph Clancy (15 March 1929 to 16 October 2014) was an Education Officer in aerodynamics at Royal Air Force College Cranwell whose textbook became standard.

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Leading edge

The leading edge is the part of the wing that first contacts the air;Crane, Dale: Dictionary of Aeronautical Terms, third edition, page 305.

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Leading-edge extension

A leading-edge extension is a small extension to an aircraft wing surface, forward of the leading edge.

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Lift (force)

A fluid flowing past the surface of a body exerts a force on it.

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Lift coefficient

The lift coefficient (CL, CN or Cz) is a dimensionless coefficient that relates the lift generated by a lifting body to the fluid density around the body, the fluid velocity and an associated reference area.

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Light aircraft

A light aircraft is an aircraft that has a maximum gross takeoff weight of or less.

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Load factor (aeronautics)

In aeronautics, the load factor is defined as the ratio of the lift of an aircraft to its weightHurt, page 37 and represents a global measure of the stress ("load") to which the structure of the aircraft is subjected: where: Since the load factor is the ratio of two forces, it is dimensionless.

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Lockheed Martin F-22 Raptor

The Lockheed Martin F-22 Raptor is a fifth-generation, single-seat, twin-engine, all-weather stealth tactical fighter aircraft developed for the United States Air Force (USAF).

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Lockheed NF-104A

The Lockheed NF-104A was an American mixed power, high-performance, supersonic aerospace trainer that served as a low-cost astronaut training vehicle for the North American X-15 and projected Boeing X-20 Dyna-Soar programs.

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McDonnell Douglas DC-9

The McDonnell Douglas DC-9 (initially known as the Douglas DC-9) is a twin-engine, single-aisle jet airliner.

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McDonnell Douglas F-4 Phantom II

The McDonnell Douglas F-4 Phantom II is a tandem two-seat, twin-engine, all-weather, long-range supersonic jet interceptor and fighter-bomber originally developed for the United States Navy by McDonnell Aircraft.

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Momentum

In Newtonian mechanics, linear momentum, translational momentum, or simply momentum (pl. momenta) is the product of the mass and velocity of an object.

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NASA

The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.

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Northwest Airlines Flight 6231

Northwest Orient Airlines Flight 6231 was the fatal crash of a Boeing 727 on December 1, 1974 in Harriman State Park near Stony Point, New York, just north of the New York City area.

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Otto Lilienthal

Otto Lilienthal (23 May 1848 – 10 August 1896) was a German pioneer of aviation who became known as the flying man.

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Pitch-up

In aerodynamics, pitch-up is a severe form of stall in an aircraft.

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Post stall

In aircraft flight dynamics, post stall is a flight condition in which the aircraft velocity has become lower than stall speed, in order to overcome stalling in the aircraft.

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Pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

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Propeller (aeronautics)

An aircraft propeller, or airscrew,Beaumont, R.A.; Aeronautical Engineering, Odhams, 1942, Chapter 13, "Airscrews".

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Pugachev's Cobra

In aerobatics, Pugachev's Cobra (or Pugachev Cobra) is a dramatic and demanding maneuver in which an airplane flying at a moderate speed suddenly raises the nose momentarily to the vertical position and slightly beyond, before dropping it back to normal flight.

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Reynolds number

The Reynolds number is an important dimensionless quantity in fluid mechanics used to help predict flow patterns in different fluid flow situations.

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Rockwell-MBB X-31

The Rockwell-Messerschmitt-Bölkow-Blohm X-31 was an experimental jet fighter designed to test fighter thrust vectoring technology.

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Schweizer SGS 1-36 Sprite

The Schweizer SGS 1-36 Sprite is a United States, single-seat, mid-wing glider built by Schweizer Aircraft of Elmira, New York.

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Sensor

In the broadest definition, a sensor is a device, module, or subsystem whose purpose is to detect events or changes in its environment and send the information to other electronics, frequently a computer processor.

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Spin (aerodynamics)

A spin is a special category of stall resulting in autorotation about the vertical axis and a shallow, rotating, downward path.

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Spoiler (aeronautics)

In aeronautics, a spoiler (sometimes called a lift spoiler or lift dumper) is a device intended to intentionally reduce the lift component of an airfoil in a controlled way.

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Stabilator

A stabilator, more frequently all-moving tail or all-flying tail, is a fully movable aircraft stabilizer.

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Stall strips

A stall strip is a fixed device employed on the leading edge of fixed-wing aircraft to modify the aerodynamic characteristics of the airfoil.

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Stick pusher

A stick pusher is a device installed in some fixed-wing aircraft to prevent the aircraft from entering an aerodynamic stall.

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Stick shaker

A stick shaker is a mechanical device to rapidly and noisily vibrate the control yoke (the "stick") of an aircraft to warn the pilot of an imminent stall.

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Supermaneuverability

Supermaneuverability is the ability of aircraft to maintain pilot control and perform maneuvers in situations and ways exceeding those that are possible using purely aerodynamic mechanisms.

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Swept wing

A swept wing is a wing that angles either backward or occasionally forward from its root rather than in a straight sideways direction.

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Switch

In electrical engineering, a switch is an electrical component that can "make" or "break" an electrical circuit, interrupting the current or diverting it from one conductor to another.

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T-tail

A T-tail is an empennage configuration in which the tailplane is mounted to the top of the fin.

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Thrust vectoring

Thrust vectoring, also thrust vector control or TVC, is the ability of an aircraft, rocket, or other vehicle to manipulate the direction of the thrust from its engine(s) or motor(s) in order to control the attitude or angular velocity of the vehicle.

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Trigonometric functions

In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) are functions of an angle.

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Turkish Airlines Flight 1951

Turkish Airlines Flight 1951 (also known as the Poldercrash) was a passenger flight that crashed during landing at Amsterdam Schiphol Airport, Netherlands, on 25 February 2009, resulting in the death of nine passengers and crew, including all three pilots, who died on impact.

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United Kingdom military aircraft serial numbers

United Kingdom military aircraft serials refers to the serial numbers used to identify individual military aircraft in the United Kingdom.

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V speeds

In aviation, V-speeds are standard terms used to define airspeeds important or useful to the operation of all aircraft.

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Velocity XL

The Velocity XL (XL: Extra Large) is an American amateur-built aircraft, produced by Velocity, Inc..

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Vortex

In fluid dynamics, a vortex (plural vortices/vortexes) is a region in a fluid in which the flow revolves around an axis line, which may be straight or curved.

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Vortex generator

A vortex generator (VG) is an aerodynamic device, consisting of a small vane usually attached to a lifting surface (or airfoil, such as an aircraft wing) or a rotor blade of a wind turbine.

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Washout (aeronautics)

Washout is a characteristic of aircraft wing design which deliberately reduces the lift distribution across the span of an aircraft’s wing.

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Weight

In science and engineering, the weight of an object is related to the amount of force acting on the object, either due to gravity or to a reaction force that holds it in place.

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West Caribbean Airways Flight 708

West Caribbean Airways Flight 708 was a West Caribbean Airways charter flight which crashed in a mountainous region in northwest Venezuela in the early hours of Tuesday, 16 August 2005, killing all 160 passengers and crew on board.

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Wind tunnel

A wind tunnel is a tool used in aerodynamic research to study the effects of air moving past solid objects.

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Wing configuration

The wing configuration of a fixed-wing aircraft (including both gliders and powered aeroplanes or airplanes) is its arrangement of lifting and related surfaces.

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Wing fence

Wing fences, also known as boundary layer fences and potential fences are fixed aerodynamic devices attached to aircraft wings.

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Wing root

The wing root is the part of the wing on a fixed-wing aircraft that is closest to the fuselage.

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Wing twist

Wing twist is an aerodynamic feature added to aircraft wings to adjust lift distribution along the wing.

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Wright brothers

The Wright brothers, Orville (August 19, 1871 – January 30, 1948) and Wilbur (April 16, 1867 – May 30, 1912), were two American aviators, engineers, inventors, and aviation pioneers who are generally credited with inventing, building, and flying the world's first successful airplane.

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1963 BAC One-Eleven test crash

The 1963 BAC One-Eleven test crash was a fatal accident of a British Aircraft Corporation prototype aircraft on 22 October 1963, near Chicklade in Wiltshire, England while it was undertaking a test flight.

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1966 Felthorpe Trident crash

On 3 June 1966, a newly-built Hawker Siddeley Trident jetliner crashed during a pre-delivery test flight near the village of Felthorpe, Norfolk, England, killing all four crew.

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1994 Fairchild Air Force Base B-52 crash

On Friday, 24 June 1994, a United States Air Force (USAF) Boeing B-52 Stratofortress crashed at Fairchild Air Force Base, Washington, United States, after its pilot, Lieutenant Colonel Arthur "Bud" Holland, maneuvered the bomber beyond its operational limits and lost control.

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References

[1] https://en.wikipedia.org/wiki/Stall_(fluid_mechanics)

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