Navs/ Gyro Flashcards
On what two properties do gyroscopic instruments operate?
Rigidity in space (which is why they work), and precession (deflection as a result of a force, causes common errors and is a part of gyroscopic systems.)
Standard rate of turn, ________ degrees per second; half-standard rate turn, _______ degrees per second
3; 1.5
If the engine driven vacuum system fails:
The AI and HI will become inoperative, leaving only the turn coordinator and mag compass for bank control, with VSI, Altimeter, and ASI used for pitch.
If the electrically driven gyro fails:
The turn coordinator will become inoperative, leaving only the AI for rate of roll/rate of turn indications (though without standard rate turn markings)
VOR reciever
VORs operate on a pulse and sweep radio waves, which are captured by the onboard reciever, which calculates the aircraft’s position relative to the OBS selected radial. Bearings to the station, radials from; situational awareness is necessary to ensure that one stays normal sensing. A quick rule is that if OBS and HI read the same course, one is likely normal sensing.
Localizer
Loclaizer is a single radio transmitter sending a left course of 90 Hz and a right course of 150 Hz. Based on how much of each signal is being recieved, the onboard instruments calculate distance from course, similair in effect to tracking to a VOR. Any time one is not flying a heading of the course direction, you will begin a backcourse and reverse sense.
ILS
Composed of localizer and glideslope (GS). Localizer provides horizontal guidance, GS provides vertical guidance to DA/DH. GS is typically positioned offset from runway, and reflected off ground for a slope of 2.5-3.5 degrees down to runway.