Electronic Systems Flashcards
What does a continuity test do?
Makes sure there’s no breaks or shorts in the wire
What does a digital multimeter measure?
Voltage, amperage, and resistance ohms and diode check
A TDR identifies how far in feet a break in the wire is
What is the pitot static system?
Pitot static tube 3 indicators Altimeter Rate of climb Airspeed indicator Each indicator operates on air from outside the aircraft
Altimeter
Altitude of the aircraft
Airspeed indicator
Speed of the aircraft
Rate of climb indicator
How fast the aircraft is climbing or descending
Barometric Altimeter
Reads altitude from sea level
Radar altimeter
Altitude from terrain
Range of 0 to 5000 feet
Accuracy of +3ft or +4% whichever is greater
0 to 1050 indicated on FD
Doppler Effect
Change in frequency of a received signal cause by relative motion
TDP
Tactical Data Processor
CDU
Control display unit
DCP
Display control panel
MFD
Multi function display
HUD
Heads up display
Used with NVG goggles
Provides flight parameter info through NVGs
CSC
Communications system control
DALS
Downed aviator locator system
Locks on signal from PRC-112 gives direction of flight and distance to find downed aircrew
IFF
Identification friend or foe Replies to interrogations from other aircraft or ships Respond only capability for H-60 Five modes Mode 4 military use only
DAFCS
Digital automatic flight control system
HSVD
Horizontal situation video display
Primary flight instruments display
HF
High frequency
UHF
Ultra high frequency
VHF
Very high frequency
ARI
Azimuth Range Indicator
Active sonar
Transmitter sends out signal and listens for return sound waves
Passive sonar
Transmitter listens for noise only
Azimuth
Target clockwise angular displacement in the horizontal plane with respect to true north
Range
Distance of target from transducer
MDL
Mission data loader
Programmable data cartridge for flight plans
AI
Attitude Indicator
Displays artificial horizon
MWS
Missile warning set
Ecm unit designed to protect helicopters against surface to air and air to air missiles
Detects missile fired and provides warning message through the indicator and APR-39
LDS
AN/AVR-2 a Laser Detecting Set
Frequency extension of the APR 39
Shares 3 of the 10 RSDS weapons replaceable assemblies
Detects and displays info concerning laser environment around the aircraft
FLIR
Forward looking infrared Provides real time infrared and daylight imagery for a variety of missions Target detection and recognition SAR Surveillance
What is a thermocouple?
Junction of two dissimilar metals that produce voltage when heated
