How to make a simple hot air balloon

The steps of making a simple hot air balloon are as follows (choose materials lightly):

Make a pocket similar to a hot air balloon with fine cloth or soft paper, except that the mouth can't leak;

String several edges of the pocket with a string, and then tie a small basket similar to a hot air balloon at the other end of the rope, paying attention to uniform balance and the length of the rope should be the same;

Put a small candle on the basket to hold your pocket, don't burn it;

Then you can light the candle and let go when the hot air fills your pocket.

First, the hot air balloon principle:

Hot air balloon? Air? Balloon), using the density of heated air or some gases such as hydrogen or helium to generate buoyancy flight. Hot air balloon mainly adjusts the temperature of the air in the balloon through its own heater, so as to control the balloon's rise and fall.

Second, the development of hot air balloon:

1783165438+1October 2 1 day, Montgomery brothers completed the first hot air balloon trip of mankind;

199 1 year1October 2 1 day, the first hot air balloon floated across Mount Everest;

1On March 20th, 999, human beings flew around the world by hot air balloon for the first time;

Nowadays, flying in a hot air balloon has become a popular air sports.