This instructable will show you how to make a hot air balloon. This balloon will not use any sort of flame to make this, though. Instead, it uses the sun to heat the balloon. I saw this at American Science & Surplus
, but it was $17.50 USD, so I wanted something cheaper; I went out and made my own!
Step 1: How it Works
The black color of the trash bags makes the air inside heat up. Everyone knows that hot air rises, thus making the balloon rise.
Step 2: Materials
These are the things you need:
- 30-Gallon Black Trash Bags
- A large roll of duct tape (preferably black color), or a large roll of clear packaging tape
- A LARGE, dirt free environment without wind
- Something to pump air with adequate volume (like the exhaust port of a shop vac)
- Two or more hands
- Free Time
Step 3: Prepare the garbage bags
First, take out about seven garbage bags. These will be the body of the balloon. After the bags are taken out, cut off the sealed ends of all but two of the bags. These are to extend the body of the tube, and also act as a coupler for each other garbage bag. Then, lay out four garbage bags, including one uncut garbage bag, on the large, clean surface. The surface needs to be clean, otherwise dust and dirt will prevent the tape from sticking to the bags. Finally, place the garbage bags inside one another, about 1 inch. Make sure that you place the bags inside one another so the air can travel though, without getting stuck in any crevices.