Hot airballoon

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Hot airballoon

  1. 1. Making a Hot Air Balloon 9th Annual Day of the Teacher Conference March 26, 2011 CSUEB Concord Campus Charles Reynes Elementary Science Specialist Castro Valley, USD
  2. 2. Making a Hot Air Balloon <ul><li>Here is a simple way to make an extraordinary classroom demonstration that can be used whenever the concept of convection comes up in your curriculum. </li></ul>
  3. 3. Making a Hot Air Balloon <ul><li>Here’s what you need. </li></ul><ul><li>0.35ml plastic sheeting </li></ul><ul><li>Heat or embossing gun </li></ul><ul><li>Extension cord </li></ul><ul><li>5-6 foot stick 1”x 3/4” A wooden yard stick works well. </li></ul><ul><li>Garage floor (heat resistant) </li></ul>
  4. 4. Making a Hot Air Balloon <ul><li>Pick up some 0.35 ml plastic painter’s tarp. I bought a big roll at The Home Depot, but I am sure smaller quantities are available. </li></ul>
  5. 5. Making a Hot Air Balloon <ul><li>Roll out about 9-12 feet of the plastic sheeting. </li></ul>
  6. 6. Making a Hot Air Balloon <ul><li>Spread out the sheet of plastic. </li></ul><ul><li>Fold it in half. </li></ul><ul><li>Use a heat gun to melt the edges together on three sides. </li></ul><ul><li>Leave a hole at the bottom for inflation. </li></ul>Seams Fold Hole for inflating
  7. 7. Making a Hot Air Balloon <ul><li>Place the stick along the edges to be melted together. Leave a 1-2 inch space between the stick and the edge of the plastic. </li></ul>
  8. 8. Making a Hot Air Balloon <ul><li>Run the heat gun along the seam. The plastic will shrink and weld together. This may take some practice. Do this on a heat resistant (cement) floor. </li></ul>
  9. 9. Making a Hot Air Balloon <ul><li>Move the stick as you go along. Here I am rounding the corner. </li></ul>
  10. 10. Making a Hot Air Balloon <ul><li>Skip about ten inches in the middle of the bottom seam. </li></ul><ul><li>This is where you fill the balloon with hot air from a blow drier. </li></ul>
  11. 11. Making a Hot Air Balloon <ul><li>Use a blow drier to inflate the balloon. </li></ul><ul><li>When I launch the balloon in class, I often fill it with cold air first. Then I fill it with hot air and let it rise to the ceiling. </li></ul>
  12. 12. Making a Hot Air Balloon <ul><li>When I launch the balloon outside, I tie kite string to one corner so that I can reel it back in and use it again. Never let the balloon get away. What if it landed on a freeway? </li></ul><ul><li>Enjoy! </li></ul>

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