Dictionary
airspeed
noun
The speed of an aircraft relative to the air through which it is flying.
Exact(60)
Confused by the incorrect airspeed readings, the pilot accidentally stalled the plane before it went into a spin and crashed into the sea, killing all on board.
As the aircraft accelerates, the airspeed of a blade (and thus the amount of lift it provides) increases when that blade is moving forwards and decreases when it is moving backwards.
Even with their engines roaring, catapulted aircraft still need the extra airspeed provided by turning the carrier into a headwind.
Parasitic drag rises as airspeed increases.
These have to be checked frequently, because however accurate the log or airspeed indicator and compass, the track of a ship or aircraft is not the same as its course.
The difference between the two columns can be calibrated to indicate the speed; this value, called the indicated airspeed, may be given in knots, miles per hour, or other units.
To facilitate all such maneuvers as well as navigation, gliders can be equipped with familiar airplane instruments such as an altimeter, an airspeed indicator, a turn-and-bank indicator, a compass, and GPS (Global Positioning System) equipment.
The FDR records many variables, not only basic aircraft conditions such as airspeed, altitude, heading, vertical acceleration, and pitch but hundreds of individual instrument readings and internal environmental conditions.
The Wright brothers are said to have installed a device on their first flyer of 1903 that logged such parameters as propeller rotation and airspeed, and Charles Lindbergh, in his epoch-making flight across the Atlantic in 1927, employed a barometric device that sensed changes in air pressure (and therefore altitude) and recorded these changes by tracing lines on a rotating spool.
The ILS can be tied into a plane's automatic pilot, whereby ground-based instruments guide the plane into position while those on the aircraft control airspeed by means of an automatic throttle.
An autogiro had to taxi for takeoff, and it required a forward airspeed in order to drive its rotor.
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