Intro

Question 1

Pressure sensing

Answer 1

Pressure data goes through the air data computer to the intruments in new a/c

Or

Directly to the instruments from the sensors

Question 2

Pressures

Answer 2

~Gauge pressure : is the diff between the pressure to be measured and atmospheric
~absolute pressure: diff in pressure to be measured and a vacum
~differential pressure: diff between the two sample mesured

Question 3

Pressure untis

Answer 3

1pascal =1 newton/m2
1 hpa = 100 pascal
1 millibar= 1hpa
1bar=1000mb=100000pa
14.7psi

Question 4

Aneroid capsule

Answer 4

Sealed capsule partially evacuated capsule

Question 5

Bourdan tube

Answer 5

~A pressure gauges
~internal pressure causes the tube to straighten
~used for higher pressure readings
Made of stiff material

And an example of application is for hydraulic pressure sesnor

Question 6

MEM’s technology
Micro electro mechanical systems

Answer 6

Covert the pressure to electrical signals

Answer 7

Line replacement units are all integreated units inside,easy to replace when something brakes

Question 8

Alternate static pressure source

Answer 8

Is inside the cabin

Question 9

IMPS

Answer 9

ERRORS

I: INSTRUMENT
M: MANOUVRE
P:POSITION
S:STATIC (CAUSED BY FRICTION IN THE SMALL TUBES USED TO CONNECT THE STATIC PORTS)

Question 10

Analogue display advantage?

Answer 10

Easy to see the rate of change
COMPARATIVE

Question 11

DIGIAL INSTRUMENTS ADVANTAGE?

Answer 11

PRECISE VALUES
DIGITAL OUTPUT QUANTITATIVE

Question 12

Types of measuring ddevices

Answer 12

~aneroid capsule
~pressure capsule
~diaphragms
~bourdan tube
~MEMs technology