Principles of Flight 1

Question 1

What are the Four Forces of Flight

Answer 1

Lift, Weight, Thrust and Drag

Question 2

What conditions are required for Straight and level unaccelerated flight

Answer 2

When a plane maintains is Heading, Altitude and Airspeed

Question 3

What is happening in Straight and Level Flight

Answer 3

Lift = Weight and Thrust = Drag

Question 4

a wing is a type of what

Answer 4

Airfoil

Question 5

What is an Airfoil

Answer 5

any surface that generates an aerodynamic force as a fluid

Question 6

What shouldn’t we confuse Fluids with

Answer 6

Liquids

Question 7

What is a Fluid

Answer 7

Any substance that deform under an applied stress

Question 8

What are types of fluids

Answer 8

Liquids, Gas and Plasma

Question 9

What is the most forward part of the wing

Answer 9

Leading edge

Question 10

What is the most Aft Part of the wing

Answer 10

Trailing Edge

Question 11

What is a Chord Line

Answer 11

The imaginary line drawn between the Forward and Aft part of the wing

Question 12

What is the Flight Path

Answer 12

Path of the planes flight through the air

Question 13

What is Relative Wind

Answer 13

The Airflow that flows around the plane as it travels through the Air

Question 14

What relationship does the Relative Wind have with the Flight Path

Answer 14

The Relative Wind is Parallel too but opposite to the Flight Path

Question 15

What is the Angle of Attack

Answer 15

The Angle between the wings Chord line and the aircraft’s relative wind

Question 16

What two major theories acting in unison create lift

Answer 16

1. Newtons 3 Laws 2. Bernoullis Principle

Question 17

What is Newtons 1st Law

Answer 17

A Body at rest remains at rest until acted on by an outside force

Question 18

What is Newtons 2nd Law

Answer 18

Force = mass x acceleration

Question 19

What is Newtons 3rd law

Answer 19

For ever action there is an equal and opposite reaction

Question 20

According to Newtonian Physics what is air doing when it hits the wing

Answer 20

Deflects down

Question 21

What is the Bernoulli Principle (Stated)

Answer 21

As the Velocity of a fluid increases, its internal pressure decreases

Question 22

As Airspeed Increases, what happens to its internal pressure

Answer 22

Decreeses

Question 23

What is the Pressure difference around the wing

Answer 23

Low Pressure = top of wing, High Pressure below the wing

Question 24

What is the pressure difference known as

Answer 24

Pressure Gradient

Question 25

How does air always move within pressure Gradients

Answer 25

From High to Low

Question 26

How does the Pressure gradient contribute towards lift

Answer 26

the High Pressure Air moves towards low pressure

Question 27

What factors are included in the Lift Equation

Answer 27

Air Density, Surface Area of the Wing, Velocity, Co-efficient of Lift

Question 28

Coefficient of Lift takes into consideration two things what are they

Answer 28

Airfoil Shape & Angle of Attack

Question 29

The Faster the Plane travels\_\_\_\_\_\_\_

Answer 29

the more Lift the wings will generate

Question 30

The higher the angle of attack\_\_\_\_\_\_\_

Answer 30

the more lift the wings will generate

Question 31

What is the Planform of a wing

Answer 31

Shape of the wing when viewed from above

Question 32

What is the Camber of a wing

Answer 32

Curvature of the wing

Question 33

What is the Aspect Ratio of the wing

Answer 33

The relationship between the Length and the width

Question 34

What is the Wing Area of the Wing

Answer 34

Total Surface area of the Wing

Question 35

What are used that alows Pilots to Manipulate the wings and change their shape and are important for Landing and Take off

Answer 35

High Lift Devices

Question 36

Initially Flaps will increase the lift by a 1)\_\_\_\_\_amount with only a 2)\_\_\_\_\_increase in drag, as the flaps are extended further lift 3)\_\_\_\_\_only slightly and 4)\_\_\_\_\_increases significantly

Answer 36

1) larger 2) Small 3) Increases 4) Drag

Question 37

The Weight force always extends and pivots from the \_\_\_\_\_\_\_

Answer 37

"Center of Gravity" also known as its "CG"

Question 38

How does the Weight of an Aircraft decrease during flight

Answer 38

As Fuel is burned

Question 39

What is Thrust

Answer 39

the forward acting force opposing Drag which propells the plane forward

Question 40

Where do planes generally get their thrust from

Answer 40

Propellars or Turbo Engines

Question 41

Propellar is an airforce, true or false

Answer 41

True

Question 42

What is Drag

Answer 42

Drag is the force opposing thrust which limits the forward speed of an aircraft

Question 43

What are the two types of Drag

Answer 43

Parasite and Induced

Question 44

What is Parasite Drag

Answer 44

A direct result of Air resistance as the plane travels through the air

Question 45

What are the 3 types of Parasite Drag

Answer 45

Form, Interference and Skin Friction

Question 46

What effect does Parasite Drag have on the Aircraft

Answer 46

As the speed of the Aircraft increases, the parasite drag will also increase

Question 47

What is induced Drag

Answer 47

As the Wing creates lift it is also creating Vortices that spiral from the bottom of the wing to the top

Question 48

When is Induced Drag increased

Answer 48

at slower airspeeds (and decrease as we increase speed)

Question 49

What is one way to experience reduced Drag

Answer 49

Through Ground Effect

Question 50

What is Ground Effect

Answer 50

the increased lift and decreased drag that an aircraft's wings generate when they are close to a fixed surface.

Question 51

What does Ground effect do to the Aircraft when taking off

Answer 51

makes the plane lift off before the regular take off speed

Question 52

WHat is L/D

Answer 52

L/D MAX - the lift-to-drag ratio, is the amount of lift generated by a wing, divided by the aerodynamic drag it creates by moving through the air.

Question 53

What is the Co-Effiecient of Lift

Answer 53

a number that's used compare the performance of airfoils and wings.