Lecture 15

Question 1

What are the four types of jet propulsion systems?

Answer 1

• Turbojet
• Turbofan
• Pulsejet
• Ramjet

Question 2

Who was Henri Coanda and what did he contribute to jet propulsion?

Answer 2

Developed the first motor-jet an early precursor to modern turbojet engines

Question 3

Who developed the first operational turbojet engine and when

Answer 3

Hans von Ohain (germany) developed HeS3 turbojet engine marking the beginning of modern jet propulsion

Question 4

What was significant about the Heinkel He 178

Answer 4

World’s first aircraft powered by turbojet engine

Question 5

What advancements did the Me 262 jet fighter bring during WWII

Answer 5

Was the first operational jet-powered fighter, significantly faster than propeller driven plans showcasing the military potential of jet propulsion

Question 6

What challenges were associated with the Me 163 jet aircraft

Answer 6

Achieved transonic speeds but faced numerous problems including instability and operation limitations at high speeds

Question 7

What is the Lockheed SR-71 Black bird, and why significant?

Answer 7

• Was a hypersonic reconnaissance aircraft that pushed limits
• New relationship with technology, prioritizing speed and altitude for strategic purposes

Question 8

How did warfare influence the development of aviation technology?

Answer 8

Warfare drove innovations like jet propulsions as nations sought faster more advanced aircrafts for combat

Question 9

What is the difference between turbojet and ramjets?

Answer 9

• Turbojets - uses a compressor to compress incoming air for combustion
• Ramjet - relies on high speed air compression, functioning effectively only at supersonic speeds

Question 10

How did advancements in jet propulsion affect aviation history?

Answer 10

Allowed for higher speeds, longer ranged, greater efficiency in both military and commercial aviation, marking a transformative period in transportation history