mach meter

Question 1

mach no

Answer 1

ratio of speed of a body to speed of sound in surrounding medium

Question 2

when aircraft TAS approaches LSS…

Answer 2

will experience compression

Question 3

MMO

Answer 3

limiting mach number

greater than MCRIT

Question 4

MCRIT

Answer 4

speed aircraft reaches speed of sound

Question 5

MACH=

Answer 5

TAS/LSS

or root(dynamic pressure/static pressure)

Question 6

LSS=

Answer 6

39 root(temp in kelvin)

Question 7

machmeter operation

Answer 7

works like an ASI
has two capsules: Airspeed and altitude capsules
either capsule increases = mach number increases
limiting speeds derived from static capsule

Question 8

Machmeter components

Answer 8

static feed
pitot feed
airspeed capsule
main shaft
ratio arm 
ranging arm
altitude capsule 
hairspring

Question 9

mach meter errors

Answer 9

IMP

Question 10

mach meter blockages

Answer 10

PUDSOD
over-read- could stall
under read- could over speed

Question 11

mach meter leaks

Answer 11

pitot leak- under read
static - pressurised- under read
unpressurised - over read

Question 12

Climbing and descending constant mach

Answer 12

Chicken tikka massala
isotherm TAS=MACH
inversion- TAS and MACH swap- chicken masala tikka