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Hot air rises - the hot air inside the balloon is less dense than the air outside.
Most balloons will support themselves at 40°F above outside air temperature and launch at 100-125°F above outside temperature. On a 70°F day, a balloon would support itself with internal air at 110°F and launch with internal air temperatures of 170-195°F. This varies with balloon size, weight onboard, and weather conditions.
It's like floating on a cloud. There's no sensation of movement. Except for a burner blast every 20-30 seconds, it's perfectly silent; you can hear people talking and dogs barking at 1000' above the ground.
You don't notice any difference on most flights. Temperatures drop about 3°F for every 1000' you climb, and there's no "wind chill" since you travel with the wind.
You climb by adding heat and descend by letting the balloon cool or releasing hot air through vents in the balloon.
This French tradition began to pacify angry farmers and frightened villagers who'd never seen a balloon. Today, this tradition continues for passengers to celebrate their flight with a toast.
We offer a range of accommodations to out-of-town students, including dormitories, shared apartments, and homestays. Please visit our 'Accommodations' page for more information.
Round-the-world balloons consist of separate and stacked hot air and helium compartments 5-10 times the size of an average hot air balloon. While many times more expensive than hot air balloons, they borrow many hot air balloon design/construction features and flying techniques.
A bird would simply bounce off the tensed fabric of a balloon that is standing or in flight.
The FAA requires balloon inspections either annually or every 100 flight hours. Every component must meet or exceed integrity and strength standards sufficient for safe flight.
A rip or hole up to 3' long in lower fabric or smaller tears in higher fabric won't greatly affect volume or lift. However, they will weaken fabric strength, so immediate repair is both called for and required.
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