WorksheetsPoF Chapter 13 High Speed Flight
Total questions: 15
Worksheet time: 8mins
As the speed of the aircraft decreases:
Shockwaves start to form first at the lower surface of the wing above Mach 1
Shockwaves start to form above the upper surface of the wing below Mach 1
The distance between the aircraft and pressure waves decreases
The distance between the aircraft and pressure waves increases
Mach number will...
increase if altitude is decreased at a constant CAS
decrease if altitude is decreased at a constant IAS
decrease if altitude is increased at a constant IAS
decrease if altitude is increased at a constant TAS
Which of the following statements is correct regarding change of TAS with constant Mach number?
As altitude increases, the temperature will drop, local speed of sound will decrease and TAS will increase
As altitude decrease, the temperature will rise, local speed of sound will decrease and TAS will increase
As altitude decreases, the temperature will rise, local speed of sound will increase and TAS will increase
As altitude increase, the temperature will increase, local speed of sound will decrease and TAS will decrease
Which of the following statements is correct?
The thinner the wing, the higher the MCRIT
The thicker the wing, the higher the MCRIT
The higher the angle of attack, the higher the MCRIT
The higher the air density, the higher the MCRIT
Which of the following statements is correct?
The airflow velocity increases when flowing through a normal shockwave
The airflow direction does not change when flowing through an expansion wave
The airflow direction does not change when flowing through a normal shockwave
The airflow direction does not change when flowing through an oblique shockwave
When airflow passes through a normal shockwave:
density increases
velocity increases
temperature decreases
static pressure reduces
As speed increases above MCRIT, shockwaves starts to form and:
lift increases
drag increases
weight increases
thrust decreases
Which of the following statements is correct?
The wing root usually has a thicker section than the wing tip so will have a lower MCRIT
Shock-induced separation will occur at the wing tip first
For a swept back wing, the CP will move towards the tip, causing the aircraft to pitch nose down
For a swept back wing, the CP will move towards the root, causing the aircraft to pitch nose down
A heavier aircraft will encounter:
coffin corner at a lower altitude
coffin corner at a higher altitude
higher stalling angle
slower stall speed
Which of the following statements is correct?
vortex generators result in a lower MCRIT
thinner wings have a lower MCRIT
sweepback wings have a higher MCRIT
thicker wings have a higher MCRIT
A Mach Trim system:
decreases the angle of incidence of the horizontal stabilizers
deflect the elevator down
moves the CG forward by transferring fuel
moves the CP back
A supersonic airflow passing through an expansion wave will experience:
increase in static pressure
no change in airflow direction
decrease in airflow velocity
decrease in static pressure
Compared to a straight wing, a sweptback wing
has a higher CLMAX
generates more lift at the same speed
stalls at the wing root first
has a higher stalling speed
Which of the following features is common on the supercritical wings?
large camber
flat upper surface
sharp leading edge
thin trailing edge
The speed of propagation of small pressure waves depends on:
aircraft speed
temperature of the air
dynamic pressure
air density
