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avionics

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    تاريخ التسجيل: Apr 2009
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    avionics

    What is Avionics?
    n Avionics is a combination of two words and meanings:
    n Aviation
    n Electronics
    What contributed to the development of Avionics?
    [IMG]file:///C:/Users/imran/AppData/Local/Temp/msohtmlclip1/01/clip_image001.png[/IMG] The answer is: there were many events and inventions that contributed to the development of avionics
    [IMG]file:///C:/Users/imran/AppData/Local/Temp/msohtmlclip1/01/clip_image001.png[/IMG] why Was Radio Important to Avionics?
    n Many important pieces of avionics equipment rely on the transmission and reception of radio waves.
    n Of course voice radio and transmissions.
    n ILS
    n VOR
    n GPS
    n And many more
    n Why Were Avionics Needed?
    n Bad Weather
    n
    Navigation Aids of the 1920’s
    n Bonfires built by farmers paid to light the way.
    n Possible Problems?
    n Light beacon placed on peaks to keep pilots from crashing into them.
    n Blind Flight” Blind Flight is flying with only the use of instruments on the interior of the a/c, without any visual references from the outside.
    3 Systems Associated w/ Blind Flight

    Altimeter


    Natural Horizon
    n Some form of navigation
    Anything that will help a pilot find the airfield, when the airfield can’t be seen


    Yeah We Can “Fly Blind”, but What Now?
    n After Doolittle proved that “Blind Flight” was possible, where do we go, and how can we get there?
    n Problem: in 1929 electronics were large and bulky, and they require subsystems that were also large and bulky
    n More weight means larger engines, more fuel, and larger wing surface. All add more weight which compounds the original problem.
    First Electronic Navigation Aids
    n Non-directional Beacon (NDB)
    n Problem: Had to fly a straight line to the beacon.
    n Best used when relatively close to the airport.
    n A-N Range
    n Advantage: No special equipment needed just headphones and a radio.
    n Best used for en-route navigation
    Can We Put What We’ve Learned to Good Use?
    n When?:
    n The late 1930’s
    n Why?:
    n Lack of control
    n Air travel was painfully slow
    n Unreliable
    n Need for versatility
    n Radio Detection And RangingDeveloped just prior to WWII
    n Provided visual representation of a/c.
    n Secondary Radar known as Information Friend or Foe, or IFF.
    n Provides ID of a/c
    Civilian version: Air Traffic Control Radar Beacon System or ATCRBS also displays altitude information
    Landing Aids
    n Localizer
    n Provides horizontal direction of the runway
    n Glide Slope
    n Provides vertical guidance to the runway
    n These two systems make up the Instrument Landing System or ILS
    n
    n Loran-C
    n
    n Long Range Navigation
    n Used to find latitude and longitude of aircraft.
    n Developed from the naval version Loran
    n “Dead Reckoning”
    n
    n Determining where you are by knowing:
    n 1. Where you’ve been
    n 2. How fast you are traveling
    n 3. What direction you are going
    All you need is a good clock, a chart, and some simple math.




    Aviation Charts
    n Things you’ll find on an Aviation Chart:
    n Lines of Longitude
    n Lines of Latitude
    n Navigation aids
    n Airways
    n Geographic features
    n Political boundaries
    n Similar to a map, except features on an aviation chart are all things that invisible, where maps deal w/ visible features.

    Heading & Course
    n Heading: direction the nose of the plane is pointing.
    n Course: the desired overland path
    “Crab” Angle: the angle between your course and heading.
    n NorthTrue North: the furthest most point (in a northerly direction) of the Earth’s axis.
    n Magnetic North: wandering point on the Earth's surface at which the Earth's magnetic field points vertically downwards. www.wikipedia.com
    Magnetic Variation: the angle between true north and magnetic north

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    تاريخ التسجيل: Apr 2006
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