How do hot air balloons fly into the sky? Hot air balloons can fly, what makes them fly

How does a hot air balloon counteract gravity and rise into the sky?

Introduction: Hot air balloons are very common in our daily life, so how are hot air balloons made? What are the safety precautions for riding a hot air balloon? Let's take a look at it! <>

First, the function and function of hot air balloons are least used in military communications and survey, because of the high performance of hydrogen survival, so the application is more extensive, but there are also flammable and explosive characteristics, Sun Shao relatives development technology application and balloon popularization hot air balloon has developed rapidly, mainly used for aviation sports and sightseeing, because of the simple operation of hot air balloons, simple landing site, low requirements, become a fashionable and healthy outdoor leisure sports. Now it has become a kind of tourism and entertainment project. <>

Second, the principle of hot air balloon take-off is based on the hot air density is smaller than the cold air density is the same, volume hot, air is colder, air is light and buoyant principle, the air in the balloon heats, when the air in the balloon is heated and expanded, the specific gravity will reduce the heat, the air will rise to cold air Hot air is lighter than cold air, because the unit volume is hot, the air quality is relatively small, and the welfare heat can make the balloon rise into the air. <>

3. Precautions Under normal circumstances, the flame on the hot air balloon will not cause personal injury, pure cotton items, none of them burn, the pilot will be safer to wear cotton clothing, it is recommended that the experiencer also wear cotton clothing as much as possible. When the hot air balloon dots or sounds, there will be a moment of flames up to 3 to 5 centimeters high, and at the same time, there will be a loud noise similar to **, at this time you must be fully prepared. In order not to affect the pilot's operation, it is recommended that the experiencer try to stand on the side, do not touch the spider plant related equipment, and when about to land, the experiencer must face the forward position, hold the edge of the gondola with his hands, and adopt a slight squatting posture.

Even if there is a sudden flameout, the hot air balloon will not descend rapidly, but slowly descend to the ground, as long as the experiencer does not panic, obey the pilot's command, and wait for the hot air balloon to land naturally, there will be no danger.

A hot air balloon heats up the air, making the air inside the balloon less dense, so it can fly with buoyancy.

Because hot air balloons use this principle of thermal expansion and cold contraction. Because the air molecules will be very active during combustion, the balloon will generate upward momentum, and the hot air balloon will fly.

Because hot air balloons have a lot of molecular activity, it is also because of the heating that this happens. Moreover, some principles of thermal expansion and cold contraction are adopted.

Conventional hot air balloons generally fly at an altitude of more than 1,000 meters, and the altitude can usually reach more than 10,000 kilometers when flying around the world, and the current world record is 34,668 meters. Hot air ballooning has become a popular aviation sport, with a large balloon shape on the top half and a gondola on the bottom half, which mainly uses air buoyancy for displacement.

Hot air balloons fly at an altitude of more than 1,000 meters, and the altitude can usually reach more than ten kilometers when flying around the world, but the temperature at an altitude of more than ten kilometers is low, generally below minus 20, so you need to keep warm equipment and always wear a mask to breathe.

Today, hot air ballooning is becoming more and more popular as a sport, and it once set a record height of 34,668 meters. Therefore, the flight altitude of the hot air balloon cannot be generalized, it is a sport that is constantly being broken, and perhaps one day this record will be broken again.

Inventor of hot air balloons

The inventors of the hot air balloon were the French papermakers Montgolfier brothers, who in the 18th century were inspired by the constant rise of scraps of paper in the stove to use paper bags to gather heat for table salt, and finally invented the hot air balloon, and in 1783 it was manned in the air.

<> the air inside the balloon is heated and the density of the tung nucleus becomes smaller, and the mass is lighter than the same volume of cold air outside the balloon, the balloon is buoyant and lifts into the air (like ice cubes floating in water). In the case of aircraft, scientists call this buoyancy force lift. Just like water and ice, the density of water becomes cold and old.

If you press the ice to the bottom of the water, it will always float up because the ice is less dense than the water.

<> the air inside the balloon becomes less dense and less massive than the same volume of cold air outside the balloon, the balloon becomes buoyant and lifts off (like ice cubes floating in water). In the case of the Hang's air controller, scientists call this buoyancy the lift. Just like water and ice, the density of water becomes less when it freezes.

Press the old block of ice into the bottom of the water, and it will float up because the ice is less dense than water.