Balloon (aeronautics) they are popular for balloonist sport activity. The first balloon which carried passengers used hot air to obtain buoyancy and was built by the brothers Josef and Etienne Montgolfier in Annonay, France in 1783: the first passenger flight was 19 September 1783, carrying a sheep, a duck, and a rooster. The first tethered manned balloon flight was by a larger Montgolfier balloon, probably on 15 October 1783. The first free balloon flight was by the same Montgolfier balloon on 21 November 1783. When heated, air expands, so a given volume of space contains less air. This makes it lighter and,
Hot air balloon an open flame near the gas. All modern Roziere balloons now use helium as a lifting gas. Solar balloons are hot air balloons that use just solar energy captured by a dark envelope to heat the air inside. Hot air balloon can be steered to a limited degree by changing the altitude of the flight. Wind in the northern hemisphere tends to turn right due to coriolis effect as the altitude increases. To help ensure the safety of pilot and passengers, a hot air balloon may carry several pieces of safety equipment. To relight the burner if the pilot light