Principles of Flight

Aircraft Motion

Flight Controls

Further Effects of the Flight Controls

Effects of Speed and Power

1 Quiz

Aircraft Motion Quiz

Physics of Aircraft

Units of Measurement

Pressure, Density and Airspeed

Bernoulli’s Principle and the Venturi

1 Quiz

Physics of Aircraft Quiz

Lift

Lift Terminology

Controlling Lift

The Lift Formula

1 Quiz

Drag

Lift/Drag Ratio

1 Quiz

Weight and Thrust

Aircraft Weight

Propeller Thrust

How Propellers Work

Propeller Effects

Thrust and Power

The Four Forces

1 Quiz

Weight and Thrust Quiz

Secondary Controls

1 Quiz

Secondary Controls Quiz

Stability

Aircraft Stability

Longitudinal Stability

1 Quiz

Straight and Level

Forces in Straight and Level Flight

Effect of Flap on Straight and Level Flight

1 Quiz

Straight and Level Quiz

Climbing

Forces in a Climb

Climb Angle vs Climb Rate

Factors Affecting the Climb

1 Quiz

Descending

Power Off Descent

Factors Affecting the Descent

Wind in a Descent

Power + Attitude = Performance

1 Quiz

Descending Quiz

Turning

Forces in a Turn

Load Factor in a Turn

Coordinated Turns

1 Quiz

Aircraft Design Features

Control Surface Balancing

1 Quiz

Aircraft Design Features Quiz

The Stall

What is a Stall?

CL and the Stall

Load Factor and Stalling

Flight Controls in a Stall

External Factors Affecting the Stall

1 Quiz

Practice Exam

Principles of Flight Exam

2 Quizzes

Principles of Flight Practice Questions

Principles of Flight Mock Exam

Weight and Thrust Quiz

Principles of Flight The Four Forces Weight and Thrust Quiz

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Question 1 of 10

1. Question
The centre of gravity is usually (a)________ of the centre of pressure. This leads to a pitch (b)_______ moment which is counteracted by the (c)_______ force from the tail.
- (a) Forwards (b) Down (c) Downwards
- (a) Aft (b) Up (c) Downwards
- (a) Forwards (b) Up (c) Upwards
- (a) Aft (b) Down (c) Upwards
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Question 2 of 10

2. Question
A windmilling propeller:
- Experiences more drag than a stationary propeller
- Will continue to generate a small amount of thrust
- Creates less drag than a stationary propeller
- Experiences zero thrust and zero drag
Correct

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Question 3 of 10

3. Question
A typical light aircraft propeller creates (a)_______ pressure behind the propeller blade and (b)_______ pressure in front of the propeller blade. This results in (c)______ which can accelerate the aircraft forwards and (d)________ which must be overcome to keep the propeller rotating.
- (a) higher (b) lower (c) thrust (d) torque
- (a) lower (b) higher (c) thrust (d) torque
- (a) higher (b) lower (c) torque (d) thrust
- (a) lower (b) higher (c) torque (d) thrust
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Question 4 of 10

4. Question
The propeller tips:
- Have a higher velocity than the sections of the propeller nearer the hub
- Rotate at a higher rate than the sections of the propeller nearer the hub
- Have a lower velocity than the sections of the propeller nearer the hub
- Rotate at a lower rate than the sections of the propeller nearer the hub
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Question 5 of 10

5. Question
Why are propeller blades twisted?
- To keep the angle of attack across the whole propeller close to its optimum value
- To keep the relative airflow across the whole propeller close to its optimum value
- To keep the rotational speed (RPM) constant when the pilot moves the throttle
- To keep the blade angle across the whole propeller constant
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Question 6 of 10

6. Question
Considering a propeller that rotates clockwise from the pilot’s view inside the cockpit, which of the following is true?
- The slipstream effect will cause a yaw to the left during takeoff
- The slipstream effect will cause a yaw to the right during takeoff
- The slipstream effect does not apply to an aircraft during takeoff
- The slipstream effect can cause a yaw to the left or right depending on wind direction
Correct

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Question 7 of 10

7. Question
Propeller torque:
- Is the equal and opposite to the propeller's rotation
- Is the reaction to the slipstream striking the tail from the left
- Results in yaw to the right during takeoff in an aircraft with a clockwise rotating propeller
- Yaws the aircraft left because the force applied is rotated 90° in the direction of the propeller's rotation
Correct

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Question 8 of 10

8. Question
Consider an aircraft with a clockwise rotating propeller when viewed from inside the cockpit. When the aircraft is at an increased angle to the relative airflow:
- The down-going propeller blade has an increased angle of attack, creating yaw to the left
- The up-going propeller blade has an increased angle of attack, creating yaw to the left
- The effect on both propeller blades is symmetrical so there is no adverse effects
- The up-going propeller blade moves through a greater distance, increasing its angle of attack and generating more thrust
Correct

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Question 9 of 10

9. Question
In order to remain airborne for the longest possible time, the pilot should:
- Fly at the minimum power required airspeed
- Fly at the minimum thrust required airspeed
- Fly at the minimum drag airspeed
- Fly at the maximum range airspeed
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Question 10 of 10

10. Question
An aircraft is said to be in equilibrium when:
- The lift, weight, thrust, and drag are balanced
- Lift equals thrust and weight equals drag
- It is not being disturbed by the pilot
- Lift equals drag and thrust equals weight
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