11.5.1 Instruments- Pitot Static Flashcards
What are the five types of aircraft instrumentation?
Pressure
Gyroscopic
Compasses
Mechanical
Electronic
What covers the certification for aircraft instruments?
CS25.1303
What are the four categories of aircraft instrument?
Flight
Engine
Navigation
Other
What are the primary flight instruments?
Attitude
Altitude
Airspeed
Direction of flight
Navigational instruments gauge factors such as?
Path of flight
Ground prox warning
Weather avoidance
What is the basic T?
The standard layout of instruments
What instruments are part of the basic T?
Airspeed Indicator (ASI)
Attitude Directional (ADI)
Altimeter
Horizontal Situation (HSI)
What does the Airspeed Indicator display?
Shows a speed which is a reference for all aerodynamic parameters
What is the attitude directional indicator?
Shows the roll and pitch attitude of the aircraft in relation to the horizon.
What does the horizontal situation indicator?
Shows the direction of the aircraft’s longitudinal axis in relation to the magnetic north.
When was the basic T first used?
Early 1950’s
What may you find adjacent to the basic T?
Turn coordinator and vertical speed indicator.
What are the three basic ways of measuring pressure?
Absolute
Gauge
Differential
How does absolute pressure measure?
Compares atmospheric pressure against zero
What can atmospheric pressure be measured in?
InHg (inches of mercury)
hPa
PSI
What is the most commonly used type of pressure gauge?
Gauge
What is gauge pressure?
The contained pressure vs atmospheric e.g. tyre pressure
What instruments use a bellow or diaphragm?
Altimeter
VSI
Machmeter
Cabin pressure
Manifold pressure
What types of pressure sensing elements are there?
Bourdon
Aneroid
Pressure Transducer
How does the bourdon tube work?
A copper, bronze or brass tube rolled into an elliptical cross section that distorts when the pressure increases.
What is a direct reading pressure gauge?
Similar to a bourdon used in general aviation aircraft.
What is a pressure transducer also called?
Pressure transmitter.
What is a pressure transducer?
A sensor that converts pressure into an analogue electrical signal.
What is the advantage of pressure transducers compared to the other systems?
The pressure can be measured at source and not brought all the way to the flight deck.