Design and Construct a Model Hot-Air Balloon

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.

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

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

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.

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.

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.

Tools Popcorn popper heater Masking tape Paper Scissors Marker Glue

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

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

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

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

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.

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.

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.”