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FEIT CHAPTER 2 Flashcards

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1
Q

Speed of aircraft

A

Measured in Mach number, which is a velocity relative to the speed of sound.

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2
Q

Speed of sound

A

770 mph or 1239 km/h at sea level

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3
Q

what is a supersonic aircraft?

A

A supersonic flight is one that is able to fly faster that the speed of sound which is faster Mach 1

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4
Q

Where is this technology used the most.

A

Military in fighter jets

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5
Q

Supersonic flights includes speeds up to ___ times faster than the speed of sound, or ____

A

5, Mach 5

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6
Q

Describe subsonic speed

A

AT this speed, an aircraft is travelling slower than the speed of sound, about less than Mach 0.8

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7
Q

Examples of Subsonic speed

A

Cessna 172, ultralights, and paragliders

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8
Q

Describe Transonic Flight

A

At this speed an air craft is approaching the speed of sound but hasn’t yet reached and surpassed Mach 1

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9
Q

Example of transonic flight are

A

Cessna Citation X and Gulfstream G650

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10
Q

Describe supersonic speed

A

At this speed, the entire aircraft is experiencing supersonic airflow and travelling at speeds faster that Mach 1. Generally Supersonic flights range from Mach 1.2 to Mach 5

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11
Q

Examples of Supersonic Speed

A

FL-4 Phantom II

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12
Q

Describe Hypersonic speed

A

At this speed the aircraft is travelling faster than Mach 5

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13
Q

Examples of Hypersonic speed

A

Rockets and Space Shuttles

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14
Q

The first person to fly faster than speed of sound

A

Captain Charles E. “Chuck” Yeager

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15
Q

What is Sonic boom

A

A sonic boom is a thunder like noise heard by a person on the ground when an aircraft flies overhead faster than the speed of the sound which travels at the speed of about 750 mph at sea level

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16
Q

How does Supersonic flight work

A

In order to travel faster than the speed of sound, the plane needs to be able to break through the shock wave. 1. As the aircraft flies through the air, it pushes air out of its way, continuously creating sound waves. 2. when the energy from the shockwaves reaches our ears, it is heard as a loud crack of a sonic boom 3. tHe shock waves will move out and away from the aircraft, creating a sudden change in pressure. 4. The air pressure waves begin to pile up ahead of the airplane and compress, forming shock waves. 5. These sound waves or air pressure waves move away from the aircraft in all directions at the speed of sound

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17
Q

Limitations of Supersonic Flight

A
  1. Excessive noise generation at takeoff and due to sonic booms during flight 2. High developement costs 3. Expensive construction material 4. High Fuel consumption
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18
Q

Speed of aircraft is measured in what?

A

Mach number

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19
Q

Mach number is relative to what?

A

Speed of sound

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20
Q

Speed of sound at sea level (mph)?

A

770 mph

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21
Q

Speed of sound at sea level (km/h)?

A

1239 km/h

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22
Q

What is a supersonic aircraft?

A

An aircraft that flies faster than the speed of sound

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23
Q

Supersonic flight occurs above which Mach number?

24
Q

Supersonic technology is mostly used where?

Study These Flashcards
A

Military fighter jets

25
Supersonic flights can reach up to how many times the speed of sound?
5 times
26
Supersonic flight upper limit is approximately which Mach number?
Mach 5
27
What is subsonic speed?
Speed slower than the speed of sound
28
Subsonic flight is generally below which Mach number?
Mach 0.8
29
Name one example of a subsonic aircraft
Cessna 172
30
Ultralights fly at which speed category?
Subsonic
31
Paragliders fly at which speed category?
Subsonic
32
What is transonic flight?
Flight approaching but not exceeding Mach 1
33
Does transonic flight exceed the speed of sound?
No
34
Name one transonic aircraft
Cessna Citation X
35
Name another transonic aircraft
Gulfstream G650
36
What is supersonic speed?
Speed faster than Mach 1
37
Supersonic flight typically ranges between which Mach numbers?
Mach 1.2 to Mach 5
38
Name one supersonic aircraft
F-4 Phantom II
39
What is hypersonic speed?
Speed faster than Mach 5
40
Hypersonic flight occurs above which Mach number?
Mach 5
41
Rockets operate at which speed category?
Hypersonic
42
Space shuttles operate at which speed category?
Hypersonic
43
Who was the first person to fly faster than sound?
Captain Charles E. "Chuck" Yeager
44
What is a sonic boom?
A thunder-like noise caused by supersonic flight
45
Who hears a sonic boom?
People on the ground
46
Why does a sonic boom occur?
Shock waves reach the ears
47
What does an aircraft do to air as it flies?
Pushes air out of its way
48
What kind of waves are continuously created by an aircraft?
Sound waves
49
What happens when pressure waves pile up ahead of an aircraft?
They form shock waves
50
At what speed do sound waves move away from the aircraft?
Speed of sound
51
What causes the loud crack during supersonic flight?
Shock waves reaching the ears
52
What physical change do shock waves create?
Sudden change in air pressure
53
One noise-related limitation of supersonic flight
Excessive noise and sonic booms
54
One cost-related limitation of supersonic flight
High development costs
55
One material-related limitation of supersonic flight
Expensive construction materials
56
One fuel-related limitation of supersonic flight
High fuel consumption
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