ocr: HOT-AIR BALLOON POWERFUL BURNER heats the air at - - the base of the balloon. Because the hot air is less dense than the surrounding cool air,it rises, inflating the envelope. Eventually the balloon becomes buoyant enough to lift the basket: : and the passengers off the ground. ENVELOPE- SUPPORT. BURNER CABLES Ascent and Descent BALLAST BASKET SEE ALSO
(.png)
