Introduction and Pressure Sensing - Ch 1 + 2 Flashcards Preview

Basic Instrumentation > Introduction and Pressure Sensing - Ch 1 + 2 > Flashcards

Flashcards in Introduction and Pressure Sensing - Ch 1 + 2 Deck (25):
1

Basic 6 Instruments

ASI
Artificial Horizon
VSI
Turn and Slip
Compass (Directional Gyro)
Altimeter

2

Pressure Instruments

ASI
Altimeter
VSI

3

Electro - Mechanical Instruments

Turn and Slip
Attitude
Compass

4

Analogue Display

Pointers move relative to a scale

Quick and easy to read
Quick and easy to detect trends
Abnormal Indication easy to spot

5

Digital Display

Display information in numerical form

Good to display precise info
Not so easy to detect trends and changes
Rapidly changing numbers/info can be hard to read

6

Comparative

Rotating Pointer - Easy to see RoC

7

Quantitative

Digital read out
Easy to see precise values

8

Colour Meanings

Red = Warning
Yellow = Caution
Green = Normal

9

MFDU

Multi functioning DU

10

EICAS

Boeing

Engine indicating and crew alert system

11

ECAM

Airbus

Electronic Centralised AC Monitoring

12

LRU

Line Replacement Units - could be anything
Replaceable (burn out sometimes)
Fwd under the flight deck
Cooled
Re-Rack(able)
Heavy
Location

13

Pressure Sensing Instruments

Altimeter
VSI
ASI
Mach

14

Gauge Pressure

Differential pressure relative to ambient air

15

Psi used in

Eng. Oil Pressure
Hydraulic System pressures
Cabin differential pressures

16

Static Pressure

Non-Linear decay with altitude

17

MEMS Technology

Micro-Electro-Mechanical Systems

- Compact
- Easy to diagnose
Collects info (pressure)

18

Aneroid Capsule

Low px

Altimeter

Slight vacuum, supported by a spring
Single/layered

19

Bellows

Low px

ASI

Multi-layered open to a pressure (not sealed)

20

Diaphragm

Low px

Delicate membrane used in artificial feel systems

21

Bourdon Tube

High Px

Party blower, distorts (unwinds) under px.

In the induction inlet manifold - MAP Gauge

22

Hysteresis

A behind reaction to the reading caused by the metals' resistance to movement

23

Pitot Pressure

Measured from a pitot tube aligned to airflow (perpendicular)

Combined head measures q + p - drains water to prevent icing. Airflow can be disturbed disturbed and therefore not accurate

24

Errors

Instruments
Manoeuvre
Position

Temp
Barometric
Time lag

25

Walk Around

Looking for abnormalities - remove before flights