Solar balloon experiments

The video shows a tetroon shaped balloon made from 20 bin bags, measuring approximately 7mx3.5m folded out, and once inflated with air the balloon was about 4m in diameter. The balloon reached a height of about 25-35m. I found it rose quicker when released from a height (the tetroon was released from my loft bathroom window). I also carried out several other tests with different forms (and some with a weight) such as a cellular tetroon, UFO, double bulb, cuboid and a tube, but I found the tetroon form the most stable in the air, it also reached the greatest height, was the largest balloon I constructed and used the entire bin bag during construction.

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