Exam #1

Question 1

3 Types of flaps?

Answer 1

1. Plain
2. Split
3. Fowler

Question 2

What are slats?

Answer 2

A device which allows air from below the wing to flow to the upper surface of the wing

Question 3

List the 3 aircraft axis

Answer 3

1. Longitudinal
2. Lateral
3. Vertical

Question 4

What are the 3 aircraft rotations?

Answer 4

1. Roll
2. Pitch
3. Yaw

Question 5

What aircraft control effects yaw?

Answer 5

Rudder

Question 6

What aircraft control effects pitch?

Answer 6

Elevators

Question 7

What aircraft control effects roll?

Answer 7

Ailerons

Question 8

What is the empennage?

Answer 8

Rear tail section of the a/c

Question 9

Stability about the longitudinal axis is provided by

Answer 9

Wings

Question 10

Stability about the lateral axis is provided by

Answer 10

Horizontal stabilizers

Question 11

Stability about the vertical axis is provided by

Answer 11

Vertical stabilizer

Question 12

Longitudinal stability is stable in

Answer 12

Pitch (lateral axis)

Question 13

Directional stability is stable in

Answer 13

Yaw (vertical axis)

Question 14

Lateral stability is stable in

Answer 14

Roll (longitudinal axis)

Question 15

Differential ailerons

Answer 15

Causes the ailerons to move at different angle to produces equal drag

Question 16

Adverse Yaw

Answer 16

Is the natural and undesirable tendency for an aircraft to yaw in the opposite direction of a roll

Question 17

Static stability

Answer 17

The initial tendency that the a/c displays after it’s equilibrium is disrupted
-Positive, negative, and neutral

Question 18

Dynamic stability

Answer 18

The tendency to oscillate after the equilibrium is disrupted

Question 19

Interconnected controls

Answer 19

Fights against adverse yaw

Question 20

Dihedral Wing

Answer 20

Upward angle

Question 21

Anhedral Wing

Answer 21

Downward angle

Question 22

Ground Effect

Answer 22

Caused by ground interference with airflow patterns when the aircraft is one wingspan (1/2 wingspan) of the ground

Question 23

2 main types of drag

Answer 23

1. Parasite drag
   - Interference, friction, and form
2. Induced drag

Question 24

Total drag = ?

Answer 24

Induced drag + Parasite drag

Question 25

Angle of attack

Answer 25

Difference between the flight path and the angle of the wing

Question 26

Factors that effect lift

Answer 26

L = CL * r * (v^2)/2 * A

Density
Velocity
Wing area

Question 27

What is “steady state”?

Answer 27

When all 4 forces are equal

Question 28

Chord Line

Answer 28

Runs front to back, dissects the wing from leading edge to trailing edge

Question 29

Interference Drag

Answer 29

Occurs when there is a sudden change in angle (fuselage to wing)

Question 30

Friction Drag

Answer 30

Air flowing over the surface (skin friction)

Question 31

Form Drag

Answer 31

Shape of the aircraft

Question 32

Induced Drag

Answer 32

Drag created to generate lift

Question 33

What creates lift?

Answer 33

Bernoulli’s Principle

Low pressure air above the wing is differing from high pressure air below the wing

Question 34

Bernoulli’s Principle

Answer 34

An increase in the speed of a fluid occurs simultaneously with a decrease in pressure

Question 35

Charle’s Law

Answer 35

When the pressure is held constant, the temperature and the volume will be in direct proportion
(Constant pressure)

Question 36

Boyle’s Law

Answer 36

Pressure is inversely proportional to volume when temperature is held constant
(Constant temperature)

Question 37

Center of pressure

Answer 37

Is the point where the total sum of a pressure field acts on a body, causing a force to act through that point

Question 38

Center of gravity

Answer 38

Is the point at which weight is evenly dispersed and all sides are in balance

Question 39

Standard Day

Answer 39

• Atmospheric pressure (29.92 Hg or 14.7 psi)
• Temperature (15°C)
• Sea Level