Airframe- Communication and Navigation Systems Flashcards
what are three basic autopilot components?
gyros, servos, and an amplifier
what are the sensing elements of an autopilot surfaces
a directional gyro, turn-and-bank gyro, altitude gyro, and altitude control
what are the actuating elements of an autopilot system?
servos that operate the control surface
what are the basic components of a communication system?
a microphone, transmitter, transmitting antenna, receiving antenna, receiver, and headset or loudspeaker
what is the most common communication system in use?
very high frequency (VHF) system
how often does the ATC transponder require certification?
every 24 calendar months
what are the components of a typical airborne VOR system?
a receiver, visual indicator, frequency selector, antennas, and power supply
why are two antennas or a single multi-element antenna usually required for an ILS system?
one for the localizer, and one for the glide slope receivers
what information does a glide slope radio beam provide?
vertical guidance for correct angle of descent
what is a DME?
Distance measuring equipment
what is VOR equipment used for?
navigation
where should DME antennas be located?
on the lower surface of the aircraft in a position that will not be blanked out by the wings in a bank
what is an ADF?
an automatic direction finder
what type antennas do most transponders have?
a short stub usually mounted on the lower surface of the fuselage
what powers an emergency locator transmitter (ELT)
a self-contained battery
