16 Attitude Indicator Flashcards
1
Q
What is the principle of operation of an Attitude Indicator?
A
- Vertically tide gyro
- Provides a datum against which to measure pitch and roll
- 2 degrees of freedom
2
Q
For a pneumatic Attitude Indicator, describe what is used to apply:
- Coarse Erection of the gyro
- Fine Erection of the gyro
A
- Coarse Erection is provided by the weighted pendulous housing
- Fine Erection is provided by Pendulous Vanes
- Uses the principle of procession
3
Q
For an Attitude Indicator, what is meant by a ‘Classic’ instrument?
A
The Gyro rotates Anti-Clockwise when viewed from above
4
Q
For an Attitude Indicator what erroneous indications can be shown when:
- Accelerating
- Decelerating
A
Accelerating: Pitch Up, Roll Right
Decelerating: Pitch Down, Roll Left
5
Q
With regards to an Attitude Indicator what:
- Types of errors are associated with it
- Are they also know as
- What causes them
A
Pitch Errors:
- Also known as Erection Errors
- Caused by the Pendulous Vanes
Roll Errors:
- Also known as Pendulous Errors
- Caused by the Weighted Base of the gyro
6
Q
With regards to the Attitude Indicator, how are the following indications effected during a turn:
- Angle of Bank
- Pitch Angle
A
- 90 degrees, AOB: Under Reads, Pitch Angle: Over Reads
- 180 degrees, AOB: Correct, Pitch Angle: Over Reads
- 270 degrees, AOB: Over Reads, Pitch Angle: Over Reads
- 360 degrees, AOB: Correct, Pitch Angle: Correct
7
Q
For an electric Attitude Indicator, describe what is used to apply:
- Coarse Erection of the gyro
- Fine Erection of the gyro
A
Uses mercury switches with pitch and roll torque motors for both
