nav 7 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
NAV 7 PowerPoint Presentation
Download Presentation
NAV 7

Loading in 2 Seconds...

play fullscreen
1 / 32

NAV 7 - PowerPoint PPT Presentation


  • 111 Views
  • Uploaded on

NAV 7. VOR and ADF. VOR. VOR Head. TO/FROM indicator or sense indicator Course Deviation Indicator or left/right needle or Track Bar Indicator Omni Bearing selector or Course selector. C172 INSTRUMENT PANEL. VHF Receiver. INSTRUMENT PANEL. VOT.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'NAV 7' - stacia


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
nav 7
NAV 7

VOR and ADF

vor head
VOR Head

TO/FROM indicator or sense indicator

Course Deviation Indicator or left/right needle or Track Bar Indicator

Omni Bearing selector

or Course selector

slide13

PRINCIPLES OF OPERATIONOperation of the VOR is based on a phase difference between two signals – a reference phase and a variable phase. The reference phase, which is omni directional, radiates from the station in a circular pattern, the phase being constant throughout 360 degrees. The variable phase rotates uniformly at 1800 rpm causing its phase to vary at a constant rate.

slide14

Magnetic North is the reference datum for measuring the phase difference between the two signals. At Magnetic North, the two signals are exactly in phase. At other points around the compass, the phase difference varies accordingly. The aircraft equipment resolves the phase difference and displays it primarily in the form of angular displacement from Magnetic North as measured from the VOR station.

slide21

VOR RELIABILITY

At the VOR facility, a monitoring system and two transmitters insure continuous reliable service. If the VOR signal is interrupted or the phasing is changed, the monitor system turns off defective equipment, turns on the stand-by transmitter, and excites an alarm at the remote control station. When a VOR is “on the air” while servicing is taking place, the station identification is removed.

adf automatic direction finder1
ADF – Automatic Direction Finder
  • Receiver tune and identify
    • LF/MF 2 or 3 letter Morse code
    • ILS locator 1 letter Morse code
    • Signal also powers bearing indicator
  • Antennae
    • Loop senses direction of station
    • Sense provides info if bearing to or from station
  • Bearing indicator
    • Points to station relative to nose or axis
    • Fixed card 0o is nose and 180o is tail
slide26
ADF
  • FUNCTIONS
    • AIRWAYS
    • AIR ROUTES
    • ILS LOCATORS – MARKER BEACONS
    • MARINE BEACONS
    • NDB APPROACHES
    • COMMERCIAL BROADCAST
slide28
ADF

LIMITATIONS

  • TWILIGHT EFFECT
    • JUST BEFORE/AFTER SUNSET/SUNRISE - fly high
    • GREATER AT GREAT DISTANCE – use less than 350 khz
  • TERRAIN or MOUNTAIN EFFECT
  • SHORELINE – signals crossing at less than 30o
  • ELECTRICAL STORMS
  • BANK ERROR – ALL TURNS
    • LOOP ANTENNAE ROTATES TO SENSE DIRECTION OF INCOMING SIGNAL AND IS MOUNTED PARALLEL TO NORMAL AXIS
slide29
ADF

ADVANTAGES

  • LOW COST INSTALLATION AND MAINTENANCE
  • NOT LINE OF LINE OF SIGHT SO GIVES GREATER RECEPTION AT LOWER ALTITUDES THAN VOR
  • PRIMARY NAVIGATION OVER LONG DISTANCE IN REMOTE AREAS
tracking to the station
TRACKING TO THE STATION
  • PARALLEL TRACK
  • DESIRED TO HEAD

DETERMINES THE TURN

  • LEFT TURN

DESIRED TRACK – INTERCEPT ANGLE = INTERCEPT HEADING

  • RIGHT TURN

DESIRED TRACK + INTERCEPT ANGLE = INTERCEPT HEADING

tracking from the station
TRACKING FROM THE STATION
  • PARALLEL TRACK
  • TAIL TO DESIRED

DETERMINES THE TURN

  • LEFT TURN

DESIRED TRACK – INTERCEPT ANGLE = INTERCEPT HEADING

  • RIGHT TURN

DESIRED TRACK + INTERCEPT ANGLE = INTERCEPT HEADING

some rules
SOME RULES
  • WHEN INTERCEPTING A TRACK TO OR FROM A STATION, BEARING INDICATOR ALWAYS AWAY

FROM 0 OR TOWARDS 180

2. WHEN TURNING, IF HEADING INDICATOR INCREASES, THEN ADF BEARINGINDICATOR (VALUE) DECREASES

HI LESS, ADF MORE

  • WHEN TRACKING, NEEDLE RIGHT? YES, THEN WIND IS FROM THE RIGHT SO TURN RIGHT, ETC.
  • MAGNETIC HEADING + RELATIVE BEARING = MAGNETIC BEARING TO THE STATION

MH + RB = MB TO THE STATION

MH = MB – RB

RB = MB - MH