Recruit Training Flight

1. Recruit Training Flight Lesson 3 Part 1 History of Flight

2. Objectives • Describe the evolution of manned flight through balloons to airships and through kites to gliders and powered aircraft. • Explain why balloons and airships fly. • Explain how modern airships are controlled. • Explain why kites fly.

3. Lighter Than Air Craft • What do we mean by “Lighter than Air Craft”

4. How do Balloons Fly? Help Imagine a Balloon the size of a house! It has ½ tonne of Helium. It will Displace about 4 tonnes of Air. The difference between these 2 weights is the Lifting Force.

5. How do Balloons Fly? Hot Air inside the Balloon is Less Dense than the Air Outside.

6. Key Dates in History • 1452 - 1519 • Leonardo De Vinci designed and attempted to build flying machines, including winged flight and the first helicopter design.

7. Key Dates in History • 25 April 1783 • The Montgolfier Brothers demonstrate their hot air balloon in Paris. • A balloon 12 meters in diameter rose to a whopping 305m (1000ft) in the air. • 19 September 1793 • The Montgolfier Brothers put animals into their balloon, thus launching the first “passenger” carrying flight.

8. The Montgolfier Brothers 25 April 1783 Demonstrate their balloon in Paris. Rose to 305m 19 September 1793 Put the first animals into the balloon, becoming the first passenger flight. Montgolfier Brothers

9. Key Dates in History • 1 December 1793 • Jacques Charles flew his balloon 27 miles (43km) witnessed by 400,000 people. • His pioneering balloon was filled with a Lighter Than Air gas…. • Hydrogen. Hydrogen filled balloon

10. Key Dates in History • 27 August 1784 • James Tytler flies the first Hot Air Balloon on a trip of ½ of a mile.

12. Any Questions

13. Airships

14. How are Airships Controlled? Helium Air Pump Tail Arrangements Air Valves Ballonets

15. Airships- Ascends Helium Air Pump Tail Arrangements Air Valves Ballonets Contract Air released into atmosphere reducing weight and allowing the Helium gas to expand, giving more Lift.

16. Airships- Descends Air Pump Ballonets Expand Air pumped into the Ballonets adding weight and compressing the Helium gas so that Lift is reduced.

17. Airships – Problems? Hindenberg Disaster – 6 May 1937 What was it filled with? Hydrogen!

18. Watch This.. • Click here to see a video about the Hindenburg Disaster. • http://www.youtube.com/watch?v=GK4pycNHwg8

19. The Future

20. Any Questions

21. Questions • In which year did the Montgolfier brothers first fly their Hot Air Balloon? • 1673. • 1783. • 1883. • 1973.

22. Questions • Who first flew a man-carrying Hydrogen-filled Balloon? • Leonardo da Vinci. • Montgolfier. • Charles. • De Rozier.

23. Questions • What are modern Airships filled with? • Helium. • Hydrogen. • Butane. • Propane.

24. Questions • An Airship rises when: • The Ballonets empty and the Helium gas expands. • The Ballonets empty and the Helium gas is compressed. • The Ballonets are filled with air and the Helium gas is • compressed. • The Ballonets are filled with air and the Helium gas expands.