A hot air balloon is a relatively large vessel which allows for human flight. A large pouch of fabric is filled with air that is heated to cause it to lift. A basket beneath the balloon carries passengers and cargo, and the wind guides it through the air . A modern hot air balloon is heated by a small propane heater mounted below a small opening to the balloon , but above the basket where passengers travel. As the air heats up, it becomes lighter than the air outside the balloon , causing the ... Hot air balloons were the primary mode of transport that allowed people to travel by air ; it was designed and developed in Paris in 1783. With a fabric ‘envelope’ to hold the hot air with an exhaust at the top and a carrier underneath the passengers, their design has never changed in centuries. The floating hot air balloon is due to the air that heats inside the envelope, which has a lower density than the colder air outside. It’s precisely the same way as a boat supported by water on ... Relish the incredible sights of lovely Sahyadri Mountains in a Hot Air Balloon Safari and be mesmerized by the charm of Lonavala. You can enjoy this fun Hot Air Balloon rides from 15th September to 28th of April. During this period the weather in Lonavala is breezy and lovely. A hot-air balloon is a large, airtight bag filled with heated air that floats in the sky with a basket underneath for people to ride in.