081.08 FLIGHT MECHANICS

Question 1

The flight-path angle is defined as the angle between an aeroplane’s (…) and (…).

Answer 1

The flight-path angle is defined as the angle between an aeroplane’s (speed vector) and (horizontal plane).

Question 2

Turning motion in a steady, level coordinated turn is created by (thrust/drag/centripetal force/centrifugal force).

Answer 2

Turning motion in a steady, level coordinated turn is created by (centripetal force).

Question 3

In a climb, weight can be resloved into two components. One that opposes lift and one that opposes (…).

Answer 3

In a climb, weight can be resloved into two components. One that opposes lift and one that opposes (thrust).

Question 4

In a straight, steady descent, thrust is equal to (…).

Answer 4

In a straight, steady descent, thrust is equal to (D - W • sin γ).

Question 5

In a straight, steady descent, lift is equal to (…).

Answer 5

In a straight, steady descent, lift is equal to (W • cos γ).

Question 6

In a straight, steady climb, lift is equal to (…).

Answer 6

In a straight, steady climb, lift is equal to (W • cos γ).

Question 7

In a straight, steady climb, thrust is equal to (…).

Answer 7

In a straight, steady climb, thrust is equal to (D + W • sin γ).

Question 8

Define ‘V_MCG‘.

Answer 8

Minimum control speed with critical engine inoperative on the ground.

Question 9

Define ‘V_MCA‘.

Answer 9

Minimum control speed with critical engine inoperative in take-off configuration.

Question 10

Define ‘V_MCL‘.

Answer 10

Minimum control speed with critical engine inoperative during approach and landing.

Question 11

Define ‘V_MC‘.

Answer 11

Minimum control speed with critical engine inoperative

Question 12

V_MCA is the minimum control speed where it is possible to maintain control and straight flight using no more than (…)° of bank withouth exceptional piloting skill or the aeroplane adopting a dangerous attitude or changing heading by more than (…)°.

Answer 12

V_MCA is the minimum control speed where it is possible to maintain control and straight flight using no more than (5)° of bank withouth exceptional piloting skill or the aeroplane adopting a dangerous attitude or changing heading by more than (20)°.

Question 13

For V_MCG determination, the CG shoudl be on the (forward/aft) limit.

Answer 13

For V_MCG determination, the CG shoudl be on the (aft) limit.

- largest arm -

Question 14

As the bank angle is decreased from 5° to 0°, the value of V_{MCA<strong> </strong>}(increases/decreases).

Answer 14

As the bank angle is decreased from 5° to 0°, the value of V_{MCA<strong> </strong>}(increases).

- because at lower bank, more rudder deflection is necessary with OEI -

Question 15

When V_MCL is defined, the aeroplane is trimmed for (take-off/approach) with (all engines operating/one engine inoperative).

Answer 15

When V_MCL is defined, the aeroplane is trimmed for (approach) with (all engines operating).

Question 16

During V_MCG determination, the lateral deviation from the runway centerline may not be more than (half the distance between runway centreline and runway edge/50 ft/30 ft).

Answer 16

During V_MCG determination, the lateral deviation from the runway centerline may not be more than (30 ft).

Question 17

The point on the diagram corresponding to the minimum value of the drag coefficient is point (1/2/3/4).

Answer 17

The point on the diagram corresponding to the minimum value of the drag coefficient is point (1).

Question 18

The point on the diagram corresponding to C_L for minimum horizontal flight speed is point (1/2/3/4).

Answer 18

The point on the diagram corresponding to C_L for minimum horizontal flight speed is point (4).

Question 19

The point on the diagram corresponding to the minimum value of drag is point (1/2/3/4).

Answer 19

The point on the diagram corresponding to the minimum value of drag is point (2).

- (C_L/C_D)_max = V_MD = minimum glide angle -

Question 20

The point on the diagram corresponding to the value for minimum sink rate is point (1/2/3/4).

Answer 20

The point on the diagram corresponding to the value for minimum sink rate is point (3).

- (C_L³/C_D²)_max = V_MP -

Question 21

Arrange the following point on a jet’s polar curve in order of increasing AoA:

• C_Lmax
• Long range cruise (zero wind)
• (L/D)_max
• Minimum rate of descent (assume zero thrust)
• Maximum range cruise (zero wind)

Answer 21

Increasing AoA = decreasing speed

1. Long range cruise (4% faster than maximum range cruise )
2. Maximum range cruise (1.32 • V_MD = V_Y)
3. (L/D)_max (= V_MD = V_X)
4. Minimum rate of descent
5. C_Lmax (stall speed)