Chapter 16A - Air Data Computer Flashcards
What does the ADC do?
Converts pressure and temperature data into electronic signals and transmits them to the display instruments and other systems.
Pressure + temp data -> electronic signals -> display instruments
An Analog to Digital Converter is called a…?
Transducer
What are the three basic inputs and the auxiliary input into an ADC?
Pitot Pressure
Static Pressure
Total Air Temperature
Angle of Attack (alpha) (auxiliary)
What are the outputs of an ADC? 5 points
- Altitude
- Vertical Speeds
- IAS / CAS / Mach Number
- Static Air Temperature
- Accurately calculated TAS
Detail the configuration module and how it fits into the Digital ADC
The purpose of the TAS input, from the air data computer, to the Inertial Navigation System is for:
The calculation of wind velocity
(already knows the drift)
What is the ADIRU?
Air Data Inertial Reference Unit
Combination of the IRS and ADC
What are some advantages of the ADC? (7 things)
- Improved displays
- Reduced instrument & lag errors
- Error correction e.g. position error
- Comparator system for failure indications
- Central source for other systems
- Lower maintenance costs – less pipes!
- Shorter pitot / static lines
The principle of operation of an Air Data Computer (ADC) is the:
Input of pitot/static and temperature data, conversion to digital/electronic signals, correction of data, transmission to the instrument
An ADC can of cannot feed an ‘analogue’ instrument?
Can
If the Air Data Computer fails, what information is lost to the flight crew?
Wind speed and direction
An air data computer: Supplies the TAS to the computer of the INS.?
True
An air data computer: Determines the Mach number, the outside (static) air temperature.?
True
An air data computer: Receives the static pressure and the total pressure.?
True
