Build a candle powered hot air balloon using painter's plastic, balsa wood, and birthday candles.

Step 1:

Cut the plastic and heat-seal the edges.

Layout your materials on a large sheet cardboard.

Pull out approximately 6 feet of the painter's plastic and cut it forming a sheet 9 x 6 ft. It's important to have plastic that is 1/2 mil (12 microns) or thinner. Thicker plastic is too heavy to fly.

Fold the sheet in half along the 9 ft side forming a two-ply sheet 4.5 x 6 ft. Use a hot knife to seal the two 4.5 ft edges. An electric hot knife makes this really easy, but it can also be done with an old metal knife heated over a flame.

Check your edges and correct any large holes. A few small holes won't cause problems.

About This Instructable


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Bio: Eric J. Wilhelm is the founder of Instructables. He has a Ph.D. from MIT in Mechanical Engineering. Eric believes in making technology accessible through ... More »
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