hot-air balloons
Buoyant wicker gondolas
Hot-air balloons are aircraft that achieve lift through heated air contained in a large fabric envelope.
The principle is simple: hot air is less dense than the cooler air surrounding it, causing the balloon to rise.
A burner beneath the envelope's opening periodically heats the air to maintain altitude, while allowing it to cool causes descent.
Hot-air balloons drift with the wind and cannot be steered horizontally, making them dependent on wind patterns for direction.
We watched the hot-air balloons launch at dawn.
- aerostatLighter-than-air craft
- lighter-than-airLess dense than atmosphere
- Montgolfier brothersInvented hot-air ballooning
- envelopeFolded paper enclosure
- gondolaSuspended transport cabin
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