Aerospace: The Journey Of Flight Chapter 7

Front 1

What is known as Aeronautics?

Back 1

The Science and art of flight throught the atmospher.

Front 2

What must to study to understand the science of Aeronautics and aerodynamics?

Back 2

the air and the machine that operates in it.

Front 3

What is the common denominator of airflow around an aircraft, the passage of air through a jet engine and the expulsion of energy from a rocker motor?

Back 3

Fluids in motions.

Front 4

How far up does the atmosphere extend?

Back 4

about 100 miles

Front 5

In regions where most Flights occur what is the homogenous mixture of gaes?

Back 5

1/5/ oxygen and 4/5 nitrogen

Front 6

At the bottom of the atmosphere the weight of all the layers of air above it press the bottom layer down at a pressure of what?

Back 6

0.07651lb/ft3

Front 7

What is the standard day pressure and mercury barometer reading

Back 7

14.7psdi or 29.92 on a barometer

Front 8

How much doe the temperature of the atmosphere decrease pre 1,000 feet increase in altitude?

Back 8

3.5 degree

Front 9

What air is less dense?

Back 9

Air at higher altitudes

Front 10

On a hot day at high elevations why may take offs be difficult?

Back 10

The air isn't dense enough.

Front 11

Viscosity is defined as what?

Back 11

as a fluid's resistance to flow.

Front 12

What is more viscous, water or honey?

Back 12

Honey

Front 13

What causes viscous drag?

Back 13

when a object is iplaced in the path of moving air.

Front 14

The transmission of drag is the result of what?

Back 14

of a mutual attraction between molecules within the airstream, but it is not transmitted to all the air molecules.

Front 15

Laminar air flow is what?

Back 15

Smooth and more desirable

Front 16

What is a visualization of how sound waves travel away from the source that is making sound.

Back 16

a pebble dropped in the lake and ripples spread out from the point where it impacts the water.

Front 17

The speed at which the disturbance travel in air is called what?

Back 17

the speed of sound.

Front 18

The speed of sound varies with what?

Back 18

altitude

Front 19

What is the speed of sound when the air temperature is 59 degree?

Back 19

About 761

Front 20

What bullet is the fuslage of the X-1

Back 20

50 caliber rifle bullet that was known to exceed the speed of sound

Front 21

When and who first broke the speed of sound?

Back 21

October 14,1947 Air Force test pilot Charles E Yeager.

Front 22

What parts of the airplane are specifically designed to react with the air?

Back 22

The wing the tail surfaces and the propellers

Front 23

What meets relative wind first?

Back 23

The leading edge

Front 24

If the airfold is designed to be flown at high speeds, its leading edge will be what?

Back 24

Sharp such as those found on the wings of jet fighters.

Front 25

What is immediately behind the leading edge?

Back 25

the upper and lower camber.

Front 26

Positive camber curve how?

Back 26

away from the centerline.

Front 27

How do negative camber curve?

Back 27

toward the centerline of the airfoil

Front 28

The Wright brothers Flyer have what kind of airfoils?

Back 28

pOSITIVE UPPER AND NEGATIVE LOWER

Front 29

What did the Wright brothers build that helped develpe their airfoil that lead to better control.

Back 29

Wind tunnel

Front 30

What is the trailing edge?

Back 30

is where the air stream rejoins after having been separated at the leading edge and directed over, and under the airfoil surface.

Front 31

What is the Chord?

Back 31

imaginary line connects the leading with the trailing edge.

Front 32

What is Relative Wind?

Back 32

it is opposite the flight path and impacts thfe airfoil at any angle to the chord line.

Front 33

What do Pilots call rotations?

Back 33

the moment a substantial amount of life is created and the airplane takes flight.

Front 34

What is the angle created by the pilot during takeoff called?

Back 34

the angle of attack.

Front 35

Be definition, what is the angle of attack?

Back 35

THE ANGLE BETWEEN THE CHORD LINE AND THE RELATIVE WIND.

Front 36

What id Daniel Bernoulli discover?

Back 36

a relationship between the pressure and speed of hte fluid in motion.

Front 37

What does Bernoulli principle state?

Back 37

As a fluid's speed increasesw, the pressure within the fluid decreases"

Front 38

What camber generally produces the most lift?

Back 38

Thicker or more pronunced.

Front 39

The more negative pressure induced to the upper camber the more what is produced?

Back 39

Lift

Front 40

At low speeds, it is desirable to have what kind of airfoil?

Back 40

high-lift

Front 41

What are the four forces of flight?

Back 41

Lift,drag, thrust and weight.

Front 42

By definition the lift force acts how?

Back 42

perpendicular to the relative wind or the line of flight.

Front 43

What acts parallel to the relative wind?

Back 43

The drag force

Front 44

Lift verses what?

Back 44

weight

Front 45

thrust verses what?

Back 45

drag

Front 46

What is a vector?

Back 46

it is a graphic mathematical illustration showing both direction and magnitude.

Front 47

Lift overcomes what?

Back 47

weight

Front 48

How can lift be increased?

Back 48

by changing the camber or curvature of the airfoil shape of the wing.

Front 49

Lift is increased as the angle of attack is increased for two reasons, what are they?

Back 49

First is the angle is increased relative to the wind, the air has to go a further distance over the typ of the wing. Secondly, because there is more relative wind striking the wing's bottom surface at higher angles of attack the pressure created on the wing's bottom surface is higher.