aviation history lecture 5: flight instruments earlier flight instruments
TRANSCRIPT
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AVIATION HISTORYLecture 5: Flight
Instruments
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Earlier Flight Instruments
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Modern Flight Instruments
Airbus A320 Glass Cockpit
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IntroductionHistory The very first aircraft had little or no flight
instruments Flying during bad weather was risky Navigation depended on pilot’s ability to use
landmarks or dead reckoning.
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Dead reckoning (DR)
Dead reckoning (DR) is the process of calculating one's position by estimating the direction and distance travelled.
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Flying Instrument
As airmail pilots began flying at night and in all kinds of weather in 1920’s, new instruments were developed to enable the aircraft to fly.
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Definition
‘Flight Instruments’ The instruments that used to display
aircraft information and to control the orientation of the aircraft during
flight.
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Birth of Flight Instruments
September 24, 1929, First FLYING BLIND performed by Jimmy Doolittle’s.
Flying Blind means fly by the aid of Flight Instrument only, without a view outside the cockpit.
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Early Flight Instruments
1. Visual radio direction finder Using vibration system to direct the aircraft. The
closer the plane is to the beacon, the more intense the vibration.
2. Artificial horizon (Attitude Indicator) Showed the orientation of the flying aircraft in
relation to the ground (show how the wings were tilted, show whether aircraft nose up/down /level.
3. Barometric altimeter Showed how far the aircraft above the ground. They
will sensitively record the time and therefore the distance from the aircraft to the ground.
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Types of Flight (VFR or IFR)
Different between VFR and IFR VFR (Visual Flight Rules)
Flying depends on pilot by “see and avoid” procedure.
IFR (Instrument Flight Rules) Flying depends on pilot and Air Traffic
Controller (ATC). Pilot depends on flight instruments to
know the aircraft’s condition, route or weather condition.
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Why Flight Instruments Important
To enable the aircraft fly through the bad weather conditions and during night.
To ensure safety and reliable operation.
To give the early warning about any failure of aircraft’s system/part so that the pilot could take the immediate action.
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Basic Flight Instruments
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Six Basic InstrumentsAirspeed Indicator Attitude Indicator Altimeter
Turn Indicator Heading Indicator Vertical Speed Indicator
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1. Altimeter Also called as Altitude Meter To indicate how high the aircraft is from
sea level (altitude). Measured in feet. It works by measuring air pressure that enter
through pitot-static system. Air pressure increases and decreases as the
aircraft descends and climbs
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2.Airspeed Indicator
Tells the pilot how fast the plane is going. To shows the aircraft's speed relative to the surrounding air. Speed is measured in knots. The airspeed can be calculated by measuring the
differences of air pressure. Air pressure is measure using
pitot-static system.
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3.Vertical Speed IndicatorTo display the vertical speed of the aircraft.It used to maintain proper rate of climb and rate of descendMeasured in feet per minute.
Rate of change is also measured based on air pressure differences through pitot-static system.
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Pitot-static System PITOT-TUBE
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4. Attitude Indicator
To show the aircraft's attitude relative to the horizon.
Also called as artificial horizon. Shows whether wings are level or not and
whether aircraft pitch up or down.
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Attitude Indicator Examples
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5. Heading Indicator To displays aircraft heading/direction with
respect to earth’s magnetic north. Also called directional gyro (Use the
gyroscope) When the aircraft turns, the needle
indicates which direction it is heading. Measured in degrees (0-north, 90-west, 180-
south, and 270-east)
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6. Turn Indicator To display direction of turn and rate of turn. Use the
gyroscope. For example, direction of roll while the aircraft is rolling. Measured in degrees per minute
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Modern Flight Instruments
“Glass Cockpit”
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B 777 Flight Deck A 320 – Flight Deck
Flight Deck of Modern Aircraft
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Glass Cockpit History
1970: NASA conducted research on flight instruments displays
1982: The success of the NASA-led glass cockpit work is reflected in the total acceptance of electronic flight displays in Boeing 767.
By the end of the 1990s, LCD display panels were increasingly favored among aircraft manufacturers because of their efficiency, reliability and legibility.
Nowadays, Modern aircraft such as the Boeing 777, Boeing 787, and Boeing 747-400, Boeing 767-400ER, Airbus A320 family (enhanced version), Airbus A330, Airbus A340 , Airbus A380 and Airbus A350 are fitted with glass cockpits consisting of liquid crystal display (LCD) units
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Glass Cockpit in Airbus A380
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Glass Cockpit
A glass cockpit is an aircraft cockpit that feature EFIS (Electronic Flight
Instrument System)
On a glass cockpit aircraft, traditional flight instruments are replaced by an EFIS with six CRT of LCD screens displaying flight information in
most convenient form, each screen integrating several instruments.
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EFIS (Electronic Flight Instrument System)
EFIS installations vary greatly. A light aircraft might be equipped with one
display unit, on which are displayed flight and navigation data.
A wide-body aircraft is likely to have six or more display units.
F/A-18 - Glass Cockpit
Bell 430 CockpitBoeing 777 Cockpit
Apache Cockpit
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EFIS (Electronic Flight Instrument System)
An EFIS installation will have the following components:
1. PFD: Primary Flight Display
2. MFD (Multifunction Display) or ND ( Navigation Display)
3. ECAM: Electronic Centralized Aircraft Monitor
4. FMS: Flight Management System
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1. Primary Flight Display (PFD)
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1. Primary Flight Display (PFD)• PFD replaces the traditional flight
instruments.• The PFD displays all information
critical to flight, including airspeed, altitude, heading, attitude & vertical speed
• PFDs also increase awareness by alerting the aircrew to potentially hazardous conditions (for example, low airspeed, high rate of descent )by changing the color or shape of the display or by providing audio alerts.
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1. Primary Flight Display (PFD)• The PFD is designed to improve
a pilot's situational awareness by integrating all information into a single display.
• The PFD is also designed to reduce the amount of time necessary to monitor the instruments.
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2. Multifunction Display/Navigation Display
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2. Multifunction Display/Navigation Display
•MFD shows navigational information from multiple system. (VOR, DME, ILS)
•MFD also displays weather information from multiple systems (on-board radar or lightning detection sensors)
•Similar with the PFD, the MFD can change the color or shape of the data to alert the aircrew to hazardous situations.
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3. Electronic Centralized Aircraft Monitor (ECAM):
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3. Electronic Centralized Aircraft Monitor (ECAM):
Monitor the overall aircraft systems, including its fuel, electrical and engine systems.
Give the pilots warning when there is a malfunction.
For example, if an engine begins to lose oil pressure, the ECAM might sound an alert, switch the display to the page with the oil system information and outline the low oil pressure data with a red box.
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Electronic Centralized Aircraft Monitor (ECAM)
The upper ECAM screen displays engine, flaps setting, fuel quantity and alert information.
The lower ECAM displays the various systems parameters.
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4. Flight Management System (FMS)
Multifunction Control
Display Unit(MCDU)
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4. Flight Management System (FMS) The flight management system (FMS) is
the avionics that holds the flight plan, and allows the pilot to modify as required in flight.
Given the position and the flight plan, the FMS guides the aircraft along the flight plan.
The FMS is normally controlled by Multifunction Control Display Unit (MCDU)
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5. Autopilot (AP)
Autopilot is a Computer device that can fly an airplane on its own.
Mostly used on long flights. However, pilot is always present to monitor and check in whether the flight is going according to plan or not.
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Exercises
1. List and explain six basic flight instruments.
2. List and explain modern flight instruments.
3. Briefly explain risks of flying with no instruments.
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The End