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  2. Lockheed P-2 Neptune - Wikipedia

    en.wikipedia.org/wiki/Lockheed_P-2_Neptune

    Aero 9B nose turret from the Neptune at the National Naval Aviation Museum, Florida, 2007.Mostly the one foot longer Aero 9C turret was installed. Before the P-3 Orion arrived in the mid-1960s, the Neptune was the primary U.S. land-based anti-submarine patrol aircraft, intended to be operated as the hunter of a '"Hunter-Killer" group, with destroyers employed as killers.

  3. Gillham code - Wikipedia

    en.wikipedia.org/wiki/Gillham_Code

    The transponder gets its altitude information from an encoding altimeter mounted behind the instrument panel that communicates via the Gillham code. Gillham code is a zero-padded 12-bit binary code using a parallel nine- [ 1 ] to eleven-wire interface , [ 2 ] the Gillham interface , that is used to transmit uncorrected barometric altitude ...

  4. Pitot–static system - Wikipedia

    en.wikipedia.org/wiki/Pitot–static_system

    Reversal errors are caused by a false static pressure reading. This false reading may be caused by abnormally large changes in an aircraft's pitch. A large change in pitch will cause a momentary showing of movement in the opposite direction. Reversal errors primarily affect altimeters and vertical speed indicators. [7]

  5. Altimeter setting - Wikipedia

    en.wikipedia.org/wiki/Altimeter_setting

    It is designed to read zero at sea level in the vicinity of the aerodrome, unlike QNH which will not read precisely zero at sea-level. [2] Related to the altimeter settings are: TA [3] - Transition Altitude - altitude at which the pilot changes the aircraft's altimeter setting (usually from QNH) to standard pressure (1013.25 hPa)

  6. Air data computer - Wikipedia

    en.wikipedia.org/wiki/Air_data_computer

    The Bendix Central Air Data Computer contains complex electromechanical mechanisms. Electrical-mechanical air data computers were developed in the early 1950s to provide a central source of airspeed, altitude, and other signals to avionic systems that needed this data.

  7. TERCOM - Wikipedia

    en.wikipedia.org/wiki/TERCOM

    The Goodyear Aircraft Corporation ATRAN (Automatic Terrain Recognition And Navigation) system for the MGM-13 Mace was the earliest known TERCOM system. In August 1952, Air Materiel Command initiated the mating of the Goodyear ATRAN with the MGM-1 Matador.

  8. Attitude indicator - Wikipedia

    en.wikipedia.org/wiki/Attitude_indicator

    [1] [2] It is a primary instrument for flight in instrument meteorological conditions. [3] [4] Attitude is always presented to users in the unit degrees (°). However, inner workings such as sensors, data and calculations may use a mix of degrees and radians, as scientists and engineers may prefer to work with radians.

  9. Position error - Wikipedia

    en.wikipedia.org/wiki/Position_error

    In an ideal static system the air pressure fed to the altimeter and airspeed indicator is equal to the pressure of the air at the altitude at which the aircraft is flying. As the air flows past an aircraft in flight, the streamlines are affected by the presence of the aircraft, and the speed of the air relative to the aircraft is different at ...