Avionics is the electronics and instrumentation that help in controlling
the flight of a fixed-wing or rotary aircraft or spacecraft that perform
a variety of functions. These include navigation instruments; control instruments
that aid in steering and controlling the craft; power indicators such as
tachometers, torquemeters, and exhaust pressure ratio indicators; and performance
indicators such as altimeters, vertical velocity indicators, and velocity
gauges. The word is derived from the expression "aviation electronics" and
also refers to the design and production of these instruments.
|Three avionics instruments are the airspeed indicator
(left), the altimeter (center),and the vertical speed indicator. The
airspeed indicator is the aircraft's 'speedometer.' The altimeter
measures pressure and displays this as height above sea level. The
vertical speed indicator displays the rate of change in altitude.
U.S. Centennial of Flight Commission