Chapter 1 - Flight Instruments Flashcards
What are the 3 basic types of flight instruments?
Primary Flight Instruments
Engine Instruments
Navigation Instruments
What type of instruments are analogue and digital instruments respectively?
Analogue = Direct sensing
Digital = Remote sensing
What is the most common type of digital display?
Active Matrix Liquid Crystal Displays (AMLCD)
What are the advantages that digital flight instruments have over legacy analogue flight instruments?
Reliability - No moving parts of mechanical linkages
Accuracy
Flexibility - A single MFD can replace multiple analogue instruments
Cost
What are the Primary Flight Instruments?
Attitude Indicator (AI) Airspeed Indicator (ASI) Altimeter (ALT) Vertical Speed Indicator (VSI) Horizontal Situation Indicator (HSI) Turn and Slip Indicator (T&S)
What instruments are found in the standard Tee shape arrangement?
ASI
AI
ALT
HSI
ASI, HSI and ALT arranged around the AI
Define: PFD, MFD and EFD
Primary Flight Display
Multi-Function Display
Electronic Flight Display
What phrase defines the difference between Control and Performance flight instruments?
Power + Attitude = Performance
What are the Control Instruments?
Power Instruments
Attitude Indicator (AI)
Indicators require no interpretation, their indications are direct and respond immediately to control changes.
What are the Performance Instruments?
Airspeed Indicator (ASI) Altimeter (ALT) Vertical Speed Indicator (VSI) Horizontal Situation Indicator (HSI) Turn & Slip Indicator (T&S)
Show what affect the power + attitude combination is having on the aircraft’s performance.
What instruments use pitot pressure, static pressure or both?
ASI - Both Pitot and Static pressure
ALT - Static Pressure
VSI - Static Pressure
What is the role of an Air Data Computer (ADC) in a Digital Electronic Flight Instrument System?
Air Data System converts pitot and static pressure into electronic signals.
Air Data Computer analyses these signals and formats them for display as Airspeed, Altitude and Vertical Speed on the PFD.
Which analogue instruments rely on gyroscopes?
AI - Displacement gyroscope
Gyro-magnetic HSI - Displacement gyroscope
Turn Indicator - Rate gyroscope
What is the AHRS in a digital flight instrument system?
Attitude Heading Reference System
Info provided by solid state, optical or vibrating structure “gyros”.
What is the direct and indirect indication of the ASI?
Direct = Airspeed
Indirect = Pitch
