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KITES

KITES. Did you know that kites…. Originated in China about 3000 years ago? Were outlawed during the 18 th century because they distracted shoe keepers from their duties? Have been used to pull boats, carriages, sleds and ice skaters? Have led to major scientific discoveries?.

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KITES

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  1. KITES

  2. Did you know that kites….. • Originated in China about 3000 years ago? • Were outlawed during the 18th century because they distracted shoe keepers from their duties? • Have been used to pull boats, carriages, sleds and ice skaters? • Have led to major scientific discoveries? Kites

  3. Famous Discoveries with Kites • In the 15th century, Leonardo da Vinci discovered how to use a kite to span a river • This method was later used in the construction of one of the world’s first suspension bridges in Niagara Falls, New York • Benjamin Franklin discovered electricity while flying a kite in 1752 Kites

  4. Avid kite flyers as children, Wilber and Orville Wright developed this love into the first successful airplane. In August of 1899, they built a biplane kite. Kites

  5. Famous Discoveries with Kites • Bell developed the first tetrahedral kite. • In 1907 Bell’s kite flew for seven minutes and lofted a man 168 feet into the air. Kites

  6. What is a kite? Kite Definition: A kite is an unpowered, heavier-than-air flying device held to the earth by a line. Kites

  7. What are the different parts of a kite? Kites

  8. Kites

  9. Different types of kites you can make Kites

  10. Kites

  11. diamond delta box cellular Sky dancer Kites

  12. stunt kite parafoil dragon birds fish Kites

  13. Materials used to build kites • Most kite sails are nylon, polyester, paper, or plastic. • Most kite spars are wood, fiberglass, plastic, or carbon. • The best kite materials are lightweight and strong. Kites

  14. How does a kite fly? • What forces are involved in flight? • Lift  • Gravity  • Drag • Tension • In order for the kite to fly, the upward lift force must be able to overcome the downward force of gravity. Kites

  15. What creates lift? • Wind is made up of particles (atoms) which move from one direction to another. • If the angle of the kite creates a difference in the airflow (moving atoms) over the top of the kite and the bottom of the kite a force known as "lift" is created Kites

  16. What creates the LIFT force? • Wind is split over the surface of the kite into two separate streams of air. • the air flow above the kite is fast, causing the pressure to be low • the air flow below the kite is slow, causing the pressure to be high • The high pressure below the kite creates lift Fast air flow Kite Slow air flow This is known as Bernouilli’s Principle Kites

  17. Lift and your Kite • The amount of lift required to cause a kite to rise depends on the overall weight of the kite in comparison to the surface area of its sail(s). • Lighter kites require less lift • Kites with a large surface area can create more lift • Conclusion: aim to make a light kite with a large surface area! Kites

  18. Summary • Wind : energy • Airfoil: angle of kite causes splitting of air molecules (wind) over the surface of the kite • Lift: lower air pressure on top than on bottom of kite • Drag: friction resistance on the kite Kites

  19. Kite Design • An effective kite design includes balanceand stability. • The kite needs to be of equal weight on each side of it's center of balance • it needs to be carefully constructed to ensure that one side is not heavier than the other. • A longer tail will help to stabilize your kite by adding drag below the kite without adding too much weight. The tail will help keep the kite pointed into the wind. Kites

  20. Kite flying movie • http://www.grc.nasa.gov/WWW/K-12/airplane/kiteprog.html • http://www.sciencebuddies.org/science-fair-projects/project_ideas/Aero_p008.shtml • Kite Modeler • http://www.grc.nasa.gov/WWW/K-12/airplane/kiteprog.html Kites

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