:Note that for aircraft flying more than a certain minimum altitude above ground, the distinction between true altitude and the so-called pressure altitude is ignored.
12.
:Bondarenko's accident occurred on " " the tenth day of a 15-day endurance experiment in a low pressure altitude chamber . . ..
13.
Without the pressure altitude reporting, the air traffic controller has no display of accurate altitude information, and must rely on the altitude reported by the pilot via radio.
14.
In IGC-approved recorders, GNSS and pressure altitude data is continuously recorded during flight in the form of regular fixes stored in non-volatile memory inside the recorder.
15.
:: : The cabin pressure drops until a predetermined point ( 8, 000 feet IIRC ), then remains constant until coming back down through the same pressure altitude.
16.
However some performance charts will define the service ceiling as the pressure altitude at which the aircraft will have the capability of climbing at 50 ft / min with one propeller feathered.
17.
The pressure altitude system in an approved recorder has the same function as a barograph and must be calibrated to the ICAO ISA ( International Civil Aviation Organisation International Standard Atmosphere ).
18.
GNSS altitude data can be compared after flight with the pressure altitude data from the independent sensor in the recorder and this is a valuable check that both systems are working correctly.
19.
One study of 8 flights in Airbus A380 aircraft found a median cabin pressure altitude of, and 65 flights in Boeing 747-400 aircraft found a median cabin pressure altitude of.
20.
One study of 8 flights in Airbus A380 aircraft found a median cabin pressure altitude of, and 65 flights in Boeing 747-400 aircraft found a median cabin pressure altitude of.
