09 Air Data Computer (ADC) Flashcards

1
Q

What is the purpose of the Air Data Computer?

A

Air Data Computer centralises the collection of sensed data and distributes it to the required outputs

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2
Q

Describe the two types of Air Data Computer

A

Analogue:
- Inputs are collected from analogue sources which are then computed by electromechanical means and output to the different analogue outputs

Digital:

  • Inputs are collected from both analogue and digital sources.
  • The analogue sources are converted into digital signals using Analogue to Digital Converters (ADC’s)
  • The ADC then processes the inputs and sends them to the different digital outputs
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3
Q

What is the advantage of Digital systems compared to Analogue systems?

A

Digital is less susceptible to corruption

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4
Q

What are the inputs for the Air Data Computer?

A
  • Static Pressure
  • Pitot Pressure
  • Measured Temperature (RAT)
  • Angle of Attack
  • Weight on Wheels
  • Configuration
  • Stored Data (e.g. recovery factor)
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5
Q

What is the nemonic used to remember the inputs for the Air Data Computer?

A

Send Pissy Tampons At Wrong Callum’s Shirt

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6
Q

What are the outputs of the Air Data Computer?

A
  • IAS and TAS
  • OAT and TAT
  • Mach Number
  • Angle of Attack
  • Altitude
  • Vertical Speed
  • Vmo and Mmo
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7
Q

What is the nemonic for remembering all of the outputs of the Air Data Computer?

A

Is Tom On The Mountain Attacking All Very Vast Monkeys

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8
Q

How many ADC’s will a small AC and a large AC typically have?
What else will an AC have if it only has one ADC?

A
  • Small AC will typically have 1 ADC
  • Large AC will typically have at least 2 ADC’s
  • AC with only one ADC will have backup pressure instruments
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9
Q

What systems use the outputs from the ADC?

A
  • Primary Flight Instruments
  • Transponders
  • Auto-pilot and Flight Director
  • Flight Management System (FMS)
  • Flight Data Recorder
  • Warning Systems
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