Systems 2 Flashcards
The T-6A can navigate via VOR and to fly VOR or ILS approaches. A remotely mounted navigation receiver in the ______ processes signals provided by _____ located on the ______ and on the bottom of the ______.
right avionics bay
antennas
vertical fin
fuselage
What physical restrictions are VOR stations subject to? What can vary the range of these signals?
Line-of-sight restriction
Range varies with altitude
VOR stations transmit beams, called _____, in every direction. The _____ in the T-6A is used to detect these signals and display the radial on which the aircraft is located, and is displayed on the _______ (EHSI).
radials
VOR receiver
electronic horizontal situation indicator
How accurate are a VOR station’s broadcasts?
VOR broadcasts are accurate to a tolerance of one full degree, so 360 radials are available
The 000º radial of each station is oriented to?
Magnetic north
The ILS system is composed of three distinct signals, which guide the aircraft to the runway. What are they?
Localizer: provides course guidance to the runway centerline
Glideslope: provides vertical guidance maintains approach angle
Marker beacon: provides indications of progress along the path
What does DME equipment do?
DME equipment in the T-6A sends paired signal pulses on radio frequencies. These pulses are received by a ground station and then retransmitted to the aircraft. The DME system measures the time required for this round trip and calculates a slant range distance in nautical miles from the aircraft to the ground station.
What is DME range measuring?
Slant Range (NOT ground distance)
What displays make up the EFIS (Electronic Flight Instrument System)?
The top display is the EADI (Electronic Attitude Display Indicator) and the bottom display is the EHSI (Electronic Horizontal Situation Indicator)
Both the EADI and EHSI receive their information from what?
the AHRS (Attitude Heading and Reference System)
What is the AHRS?
The AHRS (Attitude Heading and Reference System) is an all-attitude inertial sensor system, which provides aircraft attitude, heading, and flight dynamics information to the aircraft systems and displays.
The primary switch on the AHRS controller is the mode control switch. Which position should the switch be for the AHRS to provide the most accurate heading information to the EHSI?
SLVD (slaved)
The EHSI basically becomes a compass card with inaccurate
heading information if switched to?
DG (Directional Gyro)
This position could be used in an emergency situation where basic heading information is required.
Primary air data information is provided by the ADS (Air Data System), consisting of three Electronic Instrument Displays (EIDs) in each cockpit. Name them.
Airspeed Indicator
Altimeter
Vertical Speed Indicator
Where do EIDs (Electronic Instrument Displays) receive sensor data from?
the Air Data Computer (ADC)
What are the standby flight instruments? (5)
mechanical standby airspeed, attitude, altitude, and turn and bank indicators, and a magnetic compass
How many pitot static systems are there?
Two independent pitot static systems
Where is the primary pitot probe located?
Right wingtip
Does the ADC provide information corrected for temperature, position, or instrument error?
No
Where do the standby instruments receive pitot pressure and static pressure from?
Directly from the secondary pitot probe at the left wingtip
Where are both the primary and secondary static ports located?
the sides of the aft fuselage
Power for the EHSI and EIDs is supplied through which bus?
Generator bus
Power for the ADC is controlled by the _____ bus circuit breaker panel in the ____ cockpit
generator; front
Power for the EADI is supplied through the ____ bus, and controlled by the ____ bus circuit breaker panel in _____ cockpit
battery; battery; each
The standby instruments normally receive their power from the ____ bus. If that should fail, the standby instruments are then powered by?
battery bus; auxiliary battery by activating the AUX BAT switch
How is the intensity of the backlighting controlled on the EFIS
A rocker type switch labeled BRT/DIM
What does the Composite Mode Switch (CMP) do?
Its located on the lower left of each instrument to allow composite display on one instrument if either should fail
In a standard rate turn, where is the pointer located on the EADI?
the pointer is displaced outward to the right or left scale mark
The EFIS is designed to declutter the EADI in unusual aircraft attitudes. If the pitch angle exceeds +___º or -___º, or if the roll angle exceeds ___º, only the attitude presentation remains and all other information is removed
+30º -20º
roll exceeds 65º
When the aircraft returns to a pitch orientation of less than __° up or __° down, and the bank angle is less than __°, the normal EADI presentation reappears.
25º up or 15º down
bank less than 60º
The recovery chevrons appear when the pitch attitude is between ___º and ___º nose low/high
40º to 90º nose low or high
In either enroute or approach mode, the EHSI has five display formats available:
directional gyro (DG) only, HSI compass rose, HSI map, ARC compass rose, and expanded navigation map
In what display formats does the EHSI display a 360º rotating compass scale divided into 5 and 10º increments?
DG only, HSI compass rose, or HSI map formats
How do you reset the HDG knob to the present aircraft heading?
Pull out on the HDG knob
What does pulling out on the CRS knob do?
It resets the CRS pointer and digital course readout to a direct course to the selected NAVAID (VOR) or waypoint (GPS)
