Aircraft Instruments Pt 2. Flashcards
Vertical Speed Indicator-
This instrument indicated whether the aircraft is climbing, descending, or in level flight. Measures rate of pressure change.
Vertical Speed Indicator
An immediate indication of an increase or decrease in the aircraft’s rate of climb or descent
Trend Information
Shows a stabilized rate of change in altitude
Rate Information
State the instrument errors of a vertical speed indicator
- It inherently lags 6-9 seconds to stabilize which will inhibit accurate readings during turbulence or abrupt control movements
- A blocked static port will give a zero indication
The vertical speed indicator indicates the rate of climb or descent and is indicated in what?
feet per minute
Through this, the air leaves the instrument case slower than the diaphragm and allows for a stabilized indication of pressure change on the face of the instrument
Calibrated leak
As pressure drops, the diaphragm compresses, indicating a ________
climb
As the pressure increases, the diaphragm expands, indicating a _________
descent
Write down the pitot-static instruments table
check your ppt
This is also known as Gyroscopic Instruments
Vacuum Instruments
Where does the vacuum instruments get readings from?
Gyroscope
What are the vacuum instruments
- Attitude Indicator (AI)
- Turn Coordinator (TC)
- Heading Indicator (HI)
It is a spinning wheel or disc in which the axis of rotation is free to assume any orientation by itself
Gyroscope
What are the two principles the gyroscope operates based on?
Rigidity in Space
Gyroscopic Precession
The gyroscope remains in a fixed position in the plane in which it is spinning
Rigidity in Space
It is the tilting or turning of gyroscope in response to a deflective force
Gyroscopic Precession
When does the reaction to the gyroscopic precession occur?
Occurs at a point that is 90 degrees later in the direction of rotation
What are sources of power for vacuum instruments?
Vacuum- Driven Gyroscope
- Attitude Indicator
- Heading Indicator
Electrically Driven Gyroscope
-Turn Coordinator
This states if the amount of air in the gyroscopic instruments is accurate
Suction Gauge
What is the amount of suction in the suction gauge? and what does LOW and HIGH mean
4.5 - 5.5 inHg
Low = gyro is unstable and responds slowly
High = gyro spins too fast and be damaged
What was the attitude indicator originally called?
Artificial Horizon Indicator
It is a type of instrument used to reference the aircraft’s pitch and bank against an artificial horizon
Attitude Indicator
This senses pitch and roll movement
Attitude Indicator
The position of the airplane’s nose or wings in relation to the natural horizon
Attitude
The instrument gives immediate and direct indication of the aircraft’s orientation
Attitude Indicator