Chapter 1.2 - Exam Review

Question 1

What effect does moving the CG forward have on the Longitudinal Stability of an Aircraft?

Answer 1

Longitudinal Stability is increased.

Question 2

What factor has the most influence on Longitudinal Stability (Horizontal/Vertical) Stabiliser?

Answer 2

Horizontal Stabiliser.

Question 3

If the CG is moved aft, what effect does this have on the Longitudinal Stability of an Aircraft?

Answer 3

Longitudinal Stability is reduced.

Question 4

When the Centre of Pressure moves forward as the Angle of Attack is increased in low speeds, what effect does this have on Longitudinal Stability?

Answer 4

Reduces Longitudinal Stability.

Question 5

When engine power (thrust) is increased at low Airspeed (high Angle of Attack), what effect does this have on Longitudinal Stability of a conventional light Aircraft?

Answer 5

Reduces Longitudinal Stability.

Question 6

If the CG is moved forward of its forward limit, what effect does this have on control?

Answer 6

The Elevators become less effective.

Question 7

Strong Directional Stability and weak Lateral Stability are characteristics of what?

Answer 7

Spiral Instability.

Question 8

True or False. Elevator balance tabs are used to automatically adjust the control forces that the Pilot must exert?

Answer 8

True.

Question 9

Control surfaces must be ‘mass balanced’ to ensure the Centre of Gravity is ahead of the hinge line. What is the reason for this?

Answer 9

To prevent severe vibration.

Question 10

Trailing Edge control surfaces attached to the Elevators, Rudder or Ailerons are called Trim Tabs. Are Trim Tabs automatically adjusted like balance tabs or are they only adjustable from the Cockpit?

Answer 10

Only adjustable from the Cockpit.

Question 11

In Aircrafts with clockwise-rotating propellers (as viewed from the cockpit), propeller slipstream effect during Takeoff and Climb will cause the nose of the Aircraft to yaw to the (right/left)?

Answer 11

Left.

Question 12

Propeller torque effect also causes a yaw to the left. When is this effect most pronounced?

Answer 12

On Takeoff.

Question 13

If an Aircraft is in ground effect, what are the two main aerodynamic factors it will experience?

Answer 13

• Increase in Lift.

- Reduction in Drag.

Question 14

Just after lift-off as an Aircraft Climbs out of ground effect, it will be subjected to an (increase/decrease) in induced drag?

Answer 14

Increase.

Question 15

To maintain a constant IAS in Straight and Level flight, any reduction in weight means the lift must be (decreased/increased)?

Answer 15

Decreased.

Question 16

How can lift be decreased in Straight and Level flight if the IAS remains constant?

Answer 16

By using a lower Angle of Attack.

Question 17

Given a constant Altitude and Angle of Attack, any reduction in weight must be accompanied by an (increase/decrease) in IAS to maintain level flight?

Answer 17

Decrease.

Question 18

Do changes in Altitude have any effect on the Angle of Attack/Airspeed relationship in level flight?

Answer 18

No.

Question 19

The speed for maximum still air range is (greater than/less than/the same as) the speed for minimum drag?

Answer 19

The same as.

Question 20

Give the main reason for flying for maximum still air range?

Answer 20

To fly the greatest distance for the least amount of fuel.

Question 21

Give a reason for flying for maximum endurance?

Answer 21

To stay in the air for as long as possible for a given amount of fuel.

Question 22

An increase in weight (increases/reduces) the maximum range obtainable?

Answer 22

Reduces.

Question 23

When flying for maximum range, an increase in weight means that the IAS will need to be (increased/decreased) so that it corresponds to the speed for maximum lift/drag?

Answer 23

Increased.

Question 24

Power is set to achieve the required Airspeed when flying for maximum range in a piston-engine Aircraft fitted with a fixed-pitch propeller. This power is only obtained efficiently with (lean/rich) mixture and the carburettor heat control in (hot/cold)?

Answer 24

• Lean.

- Cold.

Question 25

When flying for maximum endurance, the Airspeed corresponding to minimum power must be used. This airspeed is slightly (less than/more than/ the same as) the speed for maximum lift/drag?

Answer 25

Less than.

Question 26

Does the Airspeed corresponding to minimum power change as height is increased when flying for maximum endurance? Does the power required to achieve the desired IAS increase or decrease with height?

Answer 26

No.

Question 27

What effect does a headwind have on level flight range and endurance?

Answer 27

The range is reduced but endurance is unaffected.

Question 28

True or False. The best glide speed to achieve the maximum glide performance in nil wind is the same as the speed for best lift/drag ratio?

Answer 28

True.

Question 29

To maintain optimum glide range and endurance, the best glide speed should be (increased/decreased) if weight is decreased?

Answer 29

Decreased.

Question 30

A tailwind will (increase/decrease) glide range and endurance?

Answer 30

Increase.

Question 31

For the same back angle, an increase in speed will (increase/decrease) the radius of turn and (increase/decrease) the rate of turn?

Answer 31

• Increase.

- Decrease.

Question 32

For a constant IAS, an increase in bank angle will (increase/decrease) the radius of turn and (increase/decrease) the rate of turn?

Answer 32

• Decrease.

- Increase.

Question 33

For an IAS of 90kts, using the rule of thumb, determine the approximate bank angle for a rate 1 turn?

Answer 33

15°.

Question 34

An increase in Altitude at the same IAS (increases/decreases) the radius of turn and (increases/decreases) the rate of turn?

Answer 34

• Increases.

- Decreases.