Loading...
Initial language selection is based on your web browser preferences.
Hot air balloon (or an aerostat) moves through the air thanks to the Archimedes' principle (properties of gas). It consists of the envelope, a textile portion which is filled with hot air and develops the necessary upward lift, the basket for the crew, the burner heating the air in the envelope, and the fuel tanks (propane or a mixture of propane and butane, also LPG). Animated model is showing a gradual heating of the air inside the envelope. As the air is heated (red color), the lifting force increases and the balloon rises. At the highest point the parachute opens and the hot air leaves the balloon. Newly incoming air is cooler (blue arrows) and therefore the balloon descends.
