Airframe Systems and Components (Navcom) Flashcards
Name the basic components of a communication system.
Microphone, transmitter, transmitting antenna , receiving antenna, receiver, and headset or loudspeaker
What is the most common communication system in use today?
VHF system (Very High Frequency)
which radio system is used for long range communication?
HF system (high frequency)
What is a transceiver?
its a self contained transmitter and receiver which share the same power supply, antenna and coaxial cable.
What type of conductors used for transmitting information between antennas and receiver/transmitters?
Coaxial cable
describe a BNC type connector?
connector for coaxial cable takes a quarter turn to fully seat.
what are the components of a typical VOR system?
Receiver , visual indicator, dipole antenna, and power supply
what are basic components of an autopilot system ?
Gyros, servos, and amplifier
what are the sensing elements of an auto pilot system?
Directional gyro, turn and bank gyro, attitude gyro, and altitude control
What are the output elements of an autopilot system?
Servos
what are three types of servos used in auto pilot system
hydraulic , pneumatic, and electric
What is the purpose of a bonding jumper on a radio shock mount?
provide a low-impedance ground return, and minimize radio interference from static electricity.
what is the frequency of an ELT?
121.5, 243.0, 406 MHz
how can you determine when the batteries of an ELT should be replaced?
Battery replacement date should be marked on the outside of the transmitter.
Describe the proper method of routing coaxial cable from the antenna to receiver.
Secure firmly about the entire length intervals of 2 feet. Cable should be run as straight as possible, Cable should not be routed or tied to other wire bundles. Be sure that the bend is at least 10 times the size of the cable diameter.
Where is the preferred location for mounting a VOR antenna on small aircraft?
On top of the forward part of the cabin with the apex of the V toward the front.
Where should DME antenna be located?
Mounted on the lower surface of the aircraft in a position that will not be blocked by wings when aircraft is banked.
Why is doubler required to be installed under aircraft skin when antenna is mounted on the aircraft?
To prevent cracking in the skin
what are marker beacons?
Part of ILS system, and is used to indicate 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?
Automatic direction finder
what does DME stand for?
Distance measuring equipment
what two parts make up the ILS system?
Localizer and glideslope
