1. Design and Construct a Model Hot-Air Balloon

2. All achievement begins with an individual who says “I can do it.”
Challenge
To design and construct a model hot-air balloon. Flights will be timed and the balloon that flies for the longest time is the winner.
All achievement begins with an individual who says “I can do it.”
Approximate project completion time: 2 hours.

3. Background
A typical hot-air balloon consists of an envelope which is commonly made of nylon or polyester.

4. Background
The envelope is made of a combination of sections, called “gores”. Balloons often have 8, 12, 18, 20, or 24 gores.

5. Background
Load tapes are sewn into the gores as they are manufactured. The load tapes are then connected to the attachment cables for the basket or gondola.

6. Background
Hot-air balloons have a deflation port at the top, and a maneuvering vent on the side.
Propane is the most common fuel source for the burners.

7. Supplies Dry cleaner bags Kite string Rubber bands Paper clips
Masking tape
Straws
Typing paper
Because of the station arrangement of the tools, not every student will perform each step at the same time.

8. Tools
Popcorn popper heater
Masking tape
Paper
Scissors
Marker
Glue

9. Guidelines 10 minutes is allowed for balloon design
Draw design on large paper
All changes must be added to original design on paper

10. Guidelines
Have instructor approve design and wait until all designs are approved before beginning construction
Use only supplies provided

11. Guidelines
Construction and testing is only allowed during time specified by instructor
Balloons may be tested as many times as needed within allowed time
Flight tests are done in construction area

12. Guidelines Each group will be given 5 minutes for flight preparation
Each group will have one chance to fly their balloon
Flight time is recorded and the longest flight wins
Guidelines

16. Discussion Why did the winning design perform as it did?
How could the winning balloon design be improved to increase flight performance?
What was your group’s strategy?
Allow the students to brainstorm among themselves to answer the questions.

17. Discussion Did any leaders emerge from the group? If so, how?
How well did your group work together and how could it have been improved?
Allow the students to brainstorm among themselves to answer the questions.

18. All achievement begins with an individual who says “I can do it.”
Applause! Applause!
We hope this activity has helped you feel that you “can do it.”