ASI

Question 1

ASI

Answer 1

it is based on PITOT tube, it measur the Total pressure and from the formule pressure Pt = Pressure Dynamic + Static Pressure.

Dynamic pressure = ½ ρV² we can estrapolate the speed

Question 2

how work

Answer 2

it substracted the Totel Pressure from the static.
Static pressur eis present inside the case of the instrument and the total Pressure is fit inside the capsule. The expasion or contraction of the capsule will be proportional to the change.

Question 3

ASI Error

Answer 3

Instrument Error > manufacturing imperfection
Position Error > generation of overflow close the static port
Manouvre Error > change in AOA

Question 4

Different type of speed

Answer 4

IAS - instrument read
CAS - IAS corrected by Position and Instrument error
EAS - CAS corrected by Compressibility error(Pressure Altitude)
TAS - EAS corrected by density error

Question 5

Color ASI

Answer 5

White arc - flap operate range(full flap, LG down) up to Vfe
Green - normal operate (Vs1 to Vno)
Yellow - caution range (Vno to Vne)
Red line - Vne
Blu line - Vyse

Question 6

Vno

Answer 6

Max normal operating limit speed. Green

Question 7

Vne

Answer 7

The Never Exceed speed - Red line

Question 8

VsO

Answer 8

The stall speed or the minimum steady flight speed in the landing configuration. Begin white arch

Question 9

Vs1

Answer 9

The stall speed or the minimum steady flight speed in a specified configuration. Begin green arch

Question 10

Vfe

Answer 10

Max Flap Extension speed - End white Arch

Question 11

Vlo

Answer 11

Max Landing Gear Operation speed (up or down)

Question 12

Vle

Answer 12

Max speed Landing Gear Extended

Question 13

Vmca

Answer 13

Min speed you can control without engine(engine failure)

Question 14

Vyse

Answer 14

best rate of climb speed with one engine failed blu line

Question 15

TAS > CAS

M<0.4 SLOW AIRCRAFT

Answer 15

TAS=√(ρ0/ρ) * CAS
ρ0 density MSL 1.225 kg/m3

MSL ISA CAS=TAS

Question 16

EAS

M > 0.4 FAST AIRCRAFT(>300 kts)

Answer 16

EAS = K * CAS 
K= compressibility factor at Sl ISA=1 in base of Mach N

MSL ISA CAS=TAS=EAS
IF ρ0=ρ AND K=1

Question 17

EAS >TAS

Answer 17

EAS = √ρ/ρ0 TAS
KCAS = √ρ/ρ0 TAS

Question 18

ASI BLOCK

Answer 18

PUDSOD
Pitot Block ASI Underead in Descent > Ps increase while Pt remain constant
Static Block ASI Overread > Ps block while Pd increase

Question 19

LEAKS

Answer 19

STATIC > 
Pressurized ASI under read
Non Press effect of aereodynamic suction slight over read
PITOT >
lower pitot pressure so underead