What are the propane tanks on a hot air balloon?

The propane tanks on a hot air balloon are essential for fueling the burner, which generates the hot air needed to lift the balloon. Typically made of durable materials, these tanks store propane gas under pressure and are connected to the burner via hoses. When the gas is ignited, it produces a flame that heats the air inside the balloon's envelope, allowing it to ascend. Proper handling and safety measures are crucial due to the flammable nature of propane.