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Bearing distance indicator BFL Balanced field length: BFR Biennial flight review: BGAN Broadcast Global Area Network BER Beyond economic repair Hull loss: BHP Brake horsepower [1] BITE Built-In Test Equipment: BL Butt Line: BME Bridge Mounted Equipment B/P Blue Print BPR bypass ratio: BOM bill of material: BTV Brake-to-Vacate System
Diagram showing the face of the "three-pointer" sensitive aircraft altimeter displaying an altitude of 10,180 ft (3,100 m). Reference pressure of about 29.92 inHg (1013 hPa) is showing in the Kollsman window. An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level. [1]
The dial on the right side displays the set ground atmospheric pressure, which can be adjusted with the knob on the bottom left. Thus, this altimeter is displaying an altitude of 10,180 feet with a ground pressure of 29.92 inHg. The stripes at the bottom are fully concealed at 15,000 feet and above and fully visible at 10,000 feet and below.
All aircraft are equipped with a small hole in the surface of the aircraft called the static port. The air pressure in the vicinity of the static port is conveyed by a conduit to the altimeter and the airspeed indicator. This static port and the conduit constitute the aircraft's static system.
In ISA temperature conditions the altimeter will read the height above the airfield/runway in the vicinity of the airfield. SPS/STD - 'Standard Pressure Setting' or just 'Standard' refers to the altimeter being set to the standard pressure of 1013.25 hPa. It is the setting that causes an altimeter to read the aircraft's flight level (FL).
Diamond DA42 Twin Star cockpit with Garmin G1000. The Garmin G1000 is an electronic flight instrument system (EFIS) typically composed of two display units, one serving as a primary flight display, and one as a multi-function display.
Pressure altimeters must be calibrated prior to flight to register the pressure as an altitude above sea level. The instrument case of the altimeter is airtight and has a vent to the static port. Inside the instrument, there is a sealed aneroid barometer. As pressure in the case decreases, the internal barometer expands, which is mechanically ...
The greater the altitude, the lower the pressure. When a barometer is supplied with a nonlinear calibration so as to indicate altitude, the instrument is a type of altimeter called a pressure altimeter or barometric altimeter. A pressure altimeter is the altimeter found in most aircraft, and skydivers use wrist-mounted versions for similar ...