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Pilot-induced oscillation

Index Pilot-induced oscillation

Pilot-induced oscillations, as defined by MIL-HDBK-1797A, are sustained or uncontrollable oscillations resulting from efforts of the pilot to control the aircraft and occurs when the pilot of an aircraft inadvertently commands an often increasing series of corrections in opposite directions, each an attempt to cover the aircraft's reaction to the previous input with an overcorrection in the opposite direction. [1]

21 relations: Accidents and incidents involving the JAS 39 Gripen, Aircraft, Aircraft pilot, Airspeed, Amplitude, Edwards Air Force Base, Elevator (aeronautics), Empennage, Flight, Flight instruments, Flight test, Flying qualities, Landing, Landing flare, Lifting body, Lockheed Martin F-22 Raptor, NASA, Phugoid, Saab JAS 39 Gripen, Stall (fluid mechanics), Variometer.

Accidents and incidents involving the JAS 39 Gripen

The JAS 39 Gripen is a fighter aircraft manufactured by the Swedish aerospace company Saab.

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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 pilot

An aircraft pilot or aviator is a person who controls the flight of an aircraft by operating its directional flight controls.

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Airspeed

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

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Amplitude

The amplitude of a periodic variable is a measure of its change over a single period (such as time or spatial period).

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Edwards Air Force Base

Edwards Air Force Base (AFB) is a United States Air Force installation located in Kern County in southern California, about northeast of Lancaster and east of Rosamond.

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Elevator (aeronautics)

Elevators are flight control surfaces, usually at the rear of an aircraft, which control the aircraft's pitch, and therefore the angle of attack and the lift of the wing.

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Empennage

The empennage, also known as the tail or tail assembly, is a structure at the rear of an aircraft that provides stability during flight, in a way similar to the feathers on an arrow.

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Flight

Flight is the process by which an object moves through an atmosphere (or beyond it, as in the case of spaceflight) without contact with the surface.

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Flight instruments

Flight instruments are the instruments in the cockpit of an aircraft that provide the pilot with information about the flight situation of that aircraft, such as altitude, airspeed and direction.

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Flight test

Flight testing is a branch of aeronautical engineering that develops and gathers data during flight of an aircraft, or atmospheric testing of launch vehicles and reusable spacecraft, and then analyzes the data to evaluate the aerodynamic flight characteristics of the vehicle in order to validate the design, including safety aspects.

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Flying qualities

Handling qualities is one of the two principal regimes in the science of flight test (the other being performance).

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Landing

Landing is the last part of a flight, where a flying animal, aircraft, or spacecraft returns to the ground.

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Landing flare

The landing flare, also referred to as the round out, is a maneuver or stage during the landing of an aircraft.

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Lifting body

A lifting body is a fixed-wing aircraft or spacecraft configuration in which the body itself produces lift.

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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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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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Phugoid

A phugoid or fugoid is an aircraft motion in which the vehicle pitches up and climbs, and then pitches down and descends, accompanied by speeding up and slowing down as it goes "downhill" and "uphill".

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Saab JAS 39 Gripen

The Saab JAS 39 Gripen (English: "griffin") is a light single-engine multirole fighter aircraft manufactured by the Swedish aerospace company Saab.

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Stall (fluid mechanics)

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

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Variometer

A variometer – also known as a rate of climb and descent indicator (RCDI), rate-of-climb indicator, vertical speed indicator (VSI), or vertical velocity indicator (VVI) – is one of the flight instruments in an aircraft used to inform the pilot of the rate of descent or climb.

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Pilot induced oscillation.

References

[1] https://en.wikipedia.org/wiki/Pilot-induced_oscillation

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