Sy201 Flight Instruments Flashcards
What is a VOR?
VHF omnidirectional range provides magnetic azimuth (radial) information for navigation purposes and are also capable of voice transmission
What is an ILS?
Instrument landing system is s ground based transmitters for runway alignment and glide slope associated with the aircraft to allow landing and approach under poor weather conditions.
What is the normal glide slope range?
2.5 to 3 degrees
How do VOR stations work?
Line of sight, and their range varies with the altitude of the receiving aircraft
What is frequency pairing?
Signals from the VOR and TACAN are identifies by three letter code transmissions and are interlocked so the pilots can be assured it’s coming from the same station.
What is DME?
Distance measuring equipment is a dark ranging system, where distance is measured by the elapsed time between the transmission of the aircraft and the reception it gets back from the aircraft
What are the VOR transmit beams called?
Radials
Where is the radial displayed on the T-6A?
On the EHSI
What is a TACAN?
Tactical air control and navigation or tactical air navigation system that is used with VORTAC systems.
What is a azimuth?
Horizontal angle measured from a defined base reference line, typically magnetic north, occasionally true north expressed expressed as 000 degrees azimuth
What is all associated with a VORTAC?
VOR and TACAN which provides VOR azimuth, TACAN azimuth, TACAN azimuth, and TACAN DME
How many radials are on an VOR?
360
Do the VORs use magnetic north or true north?
Magnetic
What is the degrees of magnetic north?
000 degrees
What components are part of an ILS
Localizer, glideslope, and marker beacons
What is a localizer?
A signal that provides course guidance to the runway centerline
What is a glideslope?
Provides vertical guidance to help maintain proper approach angle
What are marker beacons?
Provide indications of progress along the approach path
How does the DME calculate distance?
Measures the time required for the round trip and calculates a slant range distance in nautical miles from the aircraft to the ground station
What are the basic navigation systems in the T-6A?
Electronic flight instrument system(EFIS), air data system(ADS), standby systems
What are the electronic flight instrument systems?
Consists of a control panel and two 5 inch displays in each cockpit. The top display is the EADI, and the bottom display is the EHSI
What is composite mode?
Both attitude and heading information can be displayed on the EADI or the EHSI
Where do the EHSI and EADI receive their information from?
The attitude heading and reference system (AHRS)
What does the Attitude heading and reference system do?
Is an attitude inertial sensor system which provides aircraft attitude, heading, and flight dynamics information to the aircraft systems and displays
What does the meter line display for the AHRS?
If it’s horizontal then there is no slave error, but if it’s at an angle, then it shows it at an angle
What’s happens if the AHRS is flipped to the DG mode?
Becomes a compass card with inaccurate heading information, only used in emergency information
What is the slew control?
It’s a switch for correcting magnetic heading when a slaving error is indicated in DG mode
Where is the primary air data information provided by?
Air data system
What are the three Electronic instrument displays of the air data system?
Airspeed indicator(ASI), altimeter, and the vertical speed indicator
How does the ADC send information the the EIDs?
Through multiple data buses using ADC channels A and B
What are the backup indications if the main electronic flight systems fail?
Standby airspeed, attitude, altitude, bank indicators and a magnetic compass
What does the ADC not provide information for?
Corrected information for temperatures, position or instrument error
Where does the ADC get its source of information to calculate the airspeed, altitude, VSI?
The primary pitot tube and two primary static ports.
How do the standby instruments get there information?
Directly from the secondary pitot and static system
How are the standby instruments powered in the event of a battery bus failure?
AUX battery
In EHSI, what are the five display formats available?
Directional gryo only, HSI compass rose, HSI map, ARC compass rose, and the expanded navigation map
What is a marker beacon?
A specific type of vhf radio used for ILS, to give pilots a means to verify their position
What are the three types of marker beacons?
Outer marker, middle marker, inner marker
The ASI goes blank when?
When the speed drops below .4 Mach
If an electrical failure occurs, how long will the standby attitude indicator provide pitch and roll indications? And within how many degrees?
9 minutes, 6 degrees
