1. THE WRIGHT BROTHERS Master Inventors

2. What are the four forces of flight?  Weight: Planes are heavy; counteracted by lift  Lift: The force that holds the plane up; the wings  Drag: The air that pushes against the moving plane; counteracted by thrust  Thrust: The force moving the plane forward; the engine and propellers  So why are weight and drag important?  Answer: They cause lift

3. The Wind Tunnel The Wrights spent four years perfecting their airplane design with the help of a wind tunnel where they were able to see what was happening and make changes. Replica of Wrights’ wind tunnel. The fan produced 25-35 mph winds.

4. Which way is the air moving?

9. Wind tunnel faces! And now…

14. First glider (1900) flown at Kitty Hawk. What state is Kitty Hawk in?

16. What are the differences? Write them down! First GliderFlyer III

17. What’s so remarkable?  Part of what made the Wright Brother’s plane so remarkable was the fact that it could be piloted  Interactive Interactive  Read pages 40 and 42

18. We’re done… So what is the test going to be like?  You will have a choice between taking the exam or building a wind tunnel  The wind tunnel has to be better than our class model and needs to come to school Mon, Oct 29  The wind tunnel and the exam are worth the same number of points  You can do both. If you do both, I will grade your exam and the wind tunnel will be extra credit  Either way, you HAVE to do the study guide. The study guide is its own assignment.

19. I know you have questions…  What happens if I make the wind tunnel and forget to bring it on Monday?  Answer: Then you’re taking the exam.  Which one is easier?  Answer: That depends entirely on the individual  How many extra credit points will I get if I do both?  Answer: Half of the exam  What materials do I use to make the wind tunnel?  Answer: You can use anything you’d like as long as it is works

20. Hint #1: If your air vane has too large of holes, it won’t filter the air or make the air flow directional. Air Vane

21. Hint #2: If your air vane isn’t deep enough, it won’t filter the air or make the air flow directional Depth: How thick it is

22. What mistakes did we make? The towel was too thick That means the air vane didn’t let enough air into the wind tunnel

23. What design might be best? Why is this wind tunnel larger at the ends?

24. What materials can I use?

25. Wood

27. Cardboard is probably the most realistic material to use

28. The straws have small holes to trap the air and they have depth = effective air vane There is a viewing area. We used acrylic (thin plastic at Menards). You could use Saran Wrap No gaps between fan and cardboard

30. Full straws (not cut)