The Civil war
The first use of hot air balloons was in the American Civil War for surveillance of troop movements.
Hot air balloons were used to spy on the enemy. They were also used to communicate, send supplies, and drop bombs.
To spy on the enemy
Hot air balloons
it actually was a hot air balloon used it 1847 of august 22nd by austria, they sent hot air balloons filled with timed explosives towards Venice it only killed 6 people total
Hot air is used for hot air balloons.
The first use of hot air balloons was in the American Civil War for surveillance of troop movements.
Hot air balloons were a novelty and used for recreation when first invented (the first passengers were animals as no one dared ascend into the atmosphere for fear of the unknown.
Hot air balloons are now mostly used for leisure
Hydrogen is not used to inflate hot air balloons. Just regular air is used which is then heated to make the balloon more buoyant as hot air weighs less than cold air. Hence the name hot air balloons.
Hot air balloons were used for reconnaissance during the civil war.
Just regular air, which is heated. That's why they are called hot air balloons! The fuel gas used for heating the air is usually propane.
Hot air balloons
Hot air balloons use the fact that hot air rises as a way to make balloons fly. When the air inside the balloon is heated, it rises, and this creates lift which is used to make the balloon fly.
Hot air balloons were used to spy on the enemy. They were also used to communicate, send supplies, and drop bombs.
Wind !... The balloons are filled with hot air, which causes them to rise. They are then at the mercy f the wind direction.
hot air balloons, etc.