The diagram illustrates the operation and structure of a hot balloon.
Overall, it is apparent that the structure of an air balloon is separated into 3 main parts comprising an envelope, ropes and basket. Besides, the balloon’s mechanism for ascending and descending involves the regulation of hot and cold air.
The main part of the air balloon is an envelope designed in reversed teardrop shape. On the top of it, there is a self-sealing flap termed “parachute valve”, permitting a particular amount of hot air to get through. Covering the envelope are gores, and gores are made up of smaller panels. A skirt at the bottom of the object links the object to the burner and basket using ropes.
In terms of mechanism, the propane cylinder releases propane mixed with air, which will be burnt to make hot air using a burner. The volume of hot air trapped inside the envelope is lighter than cool air, causing the hot balloon to hover. For the descending process, the air is cooled and becomes heavier, making the hot balloon land gradually.