How exactly does a balloon work?
A. Heat, generated by the burner system, rises inside the envelope, expands, decreases the air density inside the balloon, which then causes it to rise. Allowing the air to cool causes the balloon to level off, and subsequently descend. To assist in “maneuvering” the balloon, we carry an altimeter, a rate of climb indicator, and a pyrometer (a temperature probe at the very top of the balloon).