communication and navigation systems Flashcards
What is the actuating (output) element component of an autopilot system?
It is the servo.
Name the basic components of a communication system.
They are the microphone, transmitter, transmitting antenna, receiving antenna, receiver, and headset or
loudspeaker.
What is the most common communication system in use today?
It is the VHF (very high frequency) system.
Which radio system is used for long range communication?
The HF (high frequency) system.
What is a transceiver?
It is a self-contained transmitter and receiver which share the same power supply, antenna, and tuning device.
What type of conductor is used for transmitting information between antennas and receiver/transmitters?
Coaxial cable.
Describe a BNC type connector.
It is a connector used with coaxial cables that takes one quarter turn to fully seat.
What are the components of a typical VOR (Very High Frequency Omni-range Navigation equipment) system?
A receiver, visual indicator, dipole antenna, and power supply.
What are the basic components of an autopilot system?
The gyros, servos, and amplifier.
What are the sensing elements of an autopilot system?
The directional gyro, turn-and-bank gyro, attitude gyro, and altitude control are the sensing elements.
What are the output elements of an autopilot system?
the servos which actuate the control surfaces.
What are three types of servos used in autopilot system?
Hydraulic, pneumatic, and electric.
What is the purpose of a bonding jumper/wire on a radio shock mount?
To provide a low-impedance ground return and minimize radio interference from static electricity.
What is the frequency of an emergency locator transmitter (ELT)?
It is 121.5, 243.0, and 406.0 MHz (121.5 times 2 equals 243)
How can you determine when the batteries of an ELT should be replaced?
date marked on the outside of the transmitter.
What Sat Nav do all aircraft have?
GPS
Describe the proper method of routing coaxial cable from the antenna to the receiver.
When installing coaxial cables, secure them firmly along their entire length at intervals of approximately two feet. To assure optimum operation, coaxial cables should not be routed or tied to other wire bundles and be as
diameter.
short as possible.
Where is the preferred location for mounting a VOR antenna on the small aircraft?
The preferred location is on top of the forward part of the cabin with the apex of the āVā toward the front. An acceptable alternate location is on top of the vertical stab.
Where should DME antennas be located?
They should be mounted on the lower surface of the aircraft in a position that will not be blanketed by the wings when the aircraft is banked.
Why are doublers required under aircraft skin when an antenna is mounted on the aircraft skin?
To prevent cracking in the skin.
What are marker beacons?
It is part of the ILS system and is used to indicate the aircraft position on the approach to the runway.
What is the indication of the middle marker beacon?
It is an amber light and an audible tone.
What is an ADF?
An automatic direction finder.
What does DME stand for?
Distance measuring equipment.
What two parts make up the ILS system?
Localizer and glideslope.
Explain how to determine the pressure altitude to an airfield and how to set it in the altimeter.
You can listen to the AT or tune in the Automatic Terminal Information Service (ATIS), and they will announce the barometric pressure altitude. You will then dial in that setting on the altimeter in the Kollsman window. Also, you can dial in the known field elevation and the altimeter will reflect the barometric pressure.
When can you test an ELT?
First five minutes of every hour.
What is the purpose of the VOR?
Navigation
How often does the ATC transponder require certification?
Every 24 calendar months
Why are two antennas or a single muliti-element antenna usually required for an ILS system?
One for the localizer and one for the glide slope receivers.
What drives a gyroscopic instrument?
Vacuum or Pressure.
What is an electric to electric measuring device?
A synchro type device.
Ultraviolent and radio are what kind of waves?
Electromagnetic radiation.
