Altimetry

Question 1

Density altitude

Answer 1

Height above a standard datum planewhich is theoritical level where the weight of the atm is 1013.2

Question 2

Rate of change of pressure

Answer 2

Is non linear

The altimeter is calibrated over its entire operating range ( USUALLY FROM 5000FT below sea level up to to 80000ft)

Is calibrated give a linear presentation of the on linear atmosphere dsitribution.is achieved by the use of variable magnification lever system

Question 3

Simple altimetre

Answer 3

1 needle
No presur3e esetting knob
1 aneroid capsule

Question 4

Sensitive altimeter

Answer 4

3 needle
Pressure knob
Aneroid capsule stack
Vibrator
Height encoder (for transponder)

Question 5

Servo altimeter

Answer 5

~a/c with no ADC
~E and I bar
~mechanical linkages removed
~lag virtually removed
~3 needles
~pressure setting knob
~aneroid capsule stack

Question 6

RAIM ( RECEIVER AUTONUMUS INTEGRITY MONITORING)

Answer 6

~ensures the integrity of the data by taking multiple measurements to ensure a degree of redundancy.

~monitors more SVs than are necessary for a 3d fix to dchek for consistancy among their pseudo rangers ,there are 2 different standards:

BASIC RAIM :FAULT DETECTION
(Requires 5 satelites ,4 for fixing plus 1)

ENHANCED RAIM : fault detection and exclusion (FDE) requires 6 sat,4 for fixing plus 2

Question 7

Altimeter errors

Answer 7

~INSTRUMENT
~MANOEUVRE
~POSITION

TEMPERATURE
BAROMETRIC
TIME LAG

Question 8

Sod PUD
SUC POD

Answer 8

SOD : static blocked pressure OVER READ in a descent
SUC: static blocekd UNDER READ in. A climb

PUD: pitot blocked UNDER READ in a descent
POC : PITOT blocked OVER read in a climb

Question 9

Leak ALTIMETRY

Answer 9

~LEAK PRESSURISED:UNDER READS (BC OF HIGH PRESSURE ,GIVEN YOU A LOW ALTITUDE)

~LEAK UNPRESSURISED:OVER READS,(BC LOW PRESSURE,GIVEN YOU HIGHER ALT0