Altimeter | Errors Flashcards
Scale error is the difference between the ___ altitude, and the basic altitude at which the measurements are taken
indicated
___ error causes irregular movement of the needle
Friction
___ error is the result of unusual attitudes of behaviour of the airflow due to the shape of the fuselage.
Position
Position error is generally greater at ___ speeds, as the angle of attack is abnormal
low
An aircraft with two altimeters, only one of which is compensated for position error, will see the difference between them ___ with increasing speed, with the non-compensated one indicating a ___ altitude
increase, higher
If the static source to the right gets blocked, in a sideslip to the right, the altimeter will ___read
over
____ error is caused by the linkages in the instrument shrinking and expanding
Temperature
Hysteresis is the ___ response to pressure changes, where changes lag behind the force which produces them. This often happens once the aircraft has been at a particular altitude for a little while.
irregular
___ is a slow increase in readings without an increase in altitude after levelling of from a climb, after ___ the readings should return to normal
drift, descending
Drift should not be more than .% for every __,____ft of change in altitude for flights over 1 hour long
0.2 15,000
___ error is the slow change over time of the entire scale error curve, as a result of internal stresses within the metal
Secular
Time lag results from the ___ that a pressure change has to travel in the pipes
distance
Time lag is worst during ___ altitude changes
rapid
Time lag causes the altimeter to ___read in a climb, and ___read in the descent
under over
Reversal error includes a momentary read in the ___ direction to the manoeuvre following an abrupt altitude change.
opposite
