In 1783, hot air balloons became the first viable option ... She played a major role in the development of high altitude gas balloons, and she was recognized as the finest plastic gas balloon ...

The hot air balloon will be available for short ... The balloon is heated by two liquefied petroleum gas burners, which produce about 30 million British thermal units per hour.

But [Becky] shows how to make a hot air balloon using nothing but tape and garbage bags. The idea is quite simple. You form a large envelope from black trash bags and fill it with air. Becky does ...