FEIT CHAPTER 1

Question 1

Lift

Answer 1

The lift is generated by pressure differences across a wing. It is the upward force pushes on the wings and causes the plane to rise in the sky.

Question 2

Drag

Answer 2

Drag is the force of motion that acts opposite to the direction of motion. Drag is caused caused by friction and difference in air pressure

Question 3

Thrust

Answer 3

It is the force that moves an aircraft in the direction of motion. It is created by propeller or jet engine.

Question 4

Weight

Answer 4

Force of Gravity pulling down on the plane. it is the force that needs to be overcome for flights to be possible

Question 5

what is Airfoil

Answer 5

It is the shape of the airplane wing which bulges more on top the than at the bottom. When the air meets the wing, it splits into two streams, top and bottom. Faster moving air has less pressure. So the area above the wing is often said to have less pressure than the area below the wing.

Question 6

Describe how airplane works in terms of forces

Answer 6

If lift is bigger than gravity, then the plane will accelerate upwards. If smaller than gravity then plane accelerates downward. If thrust is stronger than the drag, the plane will move forward

Question 7

Describe the working of Jet engines

Answer 7

Propellers suck in air… Air is drawn into the compressor… Air flows into the combustion chamber…. Air mixes with fuel… Mixture is burnt to produce a blast of hot gases…. Hot gases expand and rush out of the exhaust as a jet of gases…. It pushes the aircraft forward

Question 8

History of Jet engine

Answer 8

Frank Whittle, From Great Britain, patented, first jet engine, 1932. Whittle’s engine was used in first Gloster E28/39 aircraft. Hans von Ohain, from Germany, also worked on jet engine in the year 1935.

Question 9

What is lift?

Answer 9

The lift is generated by pressure differences across a wing.

Question 10

What type of force is lift?

Answer 10

It is the upward force.

Question 11

What does lift do to an airplane?

Answer 11

It pushes on the wings and causes the plane to rise in the sky.

Question 12

What is drag?

Answer 12

Drag is the force of motion that acts opposite to the direction of motion.

Question 13

What causes drag?

Answer 13

Drag is caused by friction and difference in air pressure.

Question 14

What is thrust?

Answer 14

It is the force that moves an aircraft in the direction of motion.

Question 15

How is thrust created?

Answer 15

It is created by propeller or jet engine.

Question 16

What is weight?

Answer 16

Force of gravity pulling down on the plane.

Question 17

Why must weight be overcome?

Answer 17

It is the force that needs to be overcome for flights to be possible.

Question 18

What is an airfoil?

Answer 18

It is the shape of the airplane wing.

Question 19

How is the airfoil shaped?

Answer 19

It bulges more on top than at the bottom.

Question 20

What happens when air meets the wing?

Answer 20

When the air meets the wing, it splits into two streams, top and bottom.

Question 21

What happens to faster moving air?

Answer 21

Faster moving air has less pressure.

Question 22

What is said about pressure above the wing?

Answer 22

The area above the wing is often said to have less pressure than the area below the wing.

Question 23

What happens if lift is bigger than gravity?

Answer 23

If lift is bigger than gravity, then the plane will accelerate upwards.

Question 24

What happens if lift is smaller than gravity?

Answer 24

If lift is smaller than gravity, then the plane accelerates downward.

Question 25

What happens if thrust is stronger than drag?

Answer 25

If thrust is stronger than the drag, the plane will move forward.

Question 26

What happens first in a jet engine?

Answer 26

Propellers suck in air.

Question 27

What happens after air is sucked in?

Answer 27

Air is drawn into the compressor.

Question 28

Where does the air flow next?

Answer 28

Air flows into the combustion chamber.

Question 29

What happens in the combustion chamber?

Answer 29

Air mixes with fuel.

Question 30

What happens to the mixture?

Answer 30

The mixture is burnt to produce a blast of hot gases.

Question 31

What happens to the hot gases?

Answer 31

Hot gases expand and rush out of the exhaust as a jet of gases.

Question 32

What is the final result?

Answer 32

It pushes the aircraft forward.

Question 33

Who patented the first jet engine?

Answer 33

Frank Whittle from Great Britain patented the first jet engine.

Question 34

In which year was it patented?

Answer 34

1932

Question 35

Which aircraft used Whittle's engine?

Answer 35

Whittle's engine was used in the first Gloster E28/39 aircraft.

Question 36

Who else worked on jet engines?

Answer 36

Hans von Ohain from Germany also worked on jet engine.

Question 37

In which year did he work on it?

Answer 37

1935