Our group of people fly freely in the sky, like an unrestrained, freewheeling bird, and once again experience the cool feeling of flying in the sky, it is really unforgettable, we are at ease, but the poor white dragonfly-like plane is pitiful, it is not enough, so it has to fall down under the effect of gravity, staggering in the air, and finally accidentally, hit a huge mountain, boom, Xiang Xiaoyu died, what a pity, I hope this helicopter is not the last one in the Great Song Dynasty。

I hope that this Wang senior has also prepared advanced tools for us in other places in case we need them.

This is because the parachute pack uses an automatic activation device (ADD), which is an atmospheric pressure device that constantly analyzes the surrounding pressure to determine the altitude and the speed of descent.

When the altitude is less than 984 feet, that is, 300 meters, and the vertical speed exceeds 125 feet per second, that is, 38 meters, the device will be automatically activated and the spare umbrella cover will be opened, so there are no accidents, after we landed safely and unharmed, we happily talked and laughed on the road, Hu Jiaojiao was still unfinished, and asked curiously: "By the way, Purple Moon girl, I was in a hurry last time, I forgot to ask, who invented this, it's so smart, it's too exciting, it's too adventurous, it's so fun." This time, I said with a beam: "In fact, the earliest prototype of the parachute was in our country, before the appearance of the winged parachute, the general principle of the parachute can be seen in Sima Qian's "Historical Records: The Five Emperors Benji" recorded that Shun held a round hat to shade the sun, jumped from the top of the burning granary and landed safely. Although this is not a skydive, it can at least show that as early as around 2000 BC, China has already had the prototype of parachuting, and it can even be said that China is the birthplace of the original parachute. According to legend, after Liu Bowen assisted Zhu Yuanzhang to seize the world, Zhu Yuanzhang feasted the ministers in a high pavilion and secretly killed him. Halfway through the banquet, Liu Bowen knew that there was a change, so he left the table for some reason, opened an umbrella brought in advance, jumped off the building, escaped safely, and lived in seclusion in the mountains and forests ever since. Although this legend is not found in the history books, in the Ming Dynasty, parachuting did become a folk acrobatic. In foreign countries, I had the good fortune to read in an old book that in an Italian prison, there was a prisoner named Raven, who tried to escape several times, but he had no plan, because not only was the police very tight, but the prison walls were several feet high, and if you jumped from it, you would not die. On one occasion, a friend or relative brought him an umbrella during a prison visit, which became a tool for him to escape from prison. He secretly tied one end of the string to the umbrella bone, and held the other end in his hand, and on a dark and windy night, Ravan avoided the guards, climbed the high wall, and jumped down with the umbrella in his arms, and landed unharmed. But LaVine was later taken back to prison, and his escape confession piqued the interest of aviation experts. Inspired by this adventure, Blanchal of France carried the dog and heavy loads into the air, and then successfully descended by parachute. As early as the 15th century, the possibility of using parachutes for descent was theoretically demonstrated. The Italian scholar Veranzio once talked about in his book that by fixing a square canvas to four wooden sticks of equal size, and tying four ropes to the four corners, a person can jump from a high altitude by pulling them with both hands. After the Chinese umbrella was introduced to Europe, the French had tried to make a parachute, the diameter of the umbrella is 2.5 meters, there are 22 hangings, a hanging basket is tied to the lower part of the umbrella, and a sheep is loaded inside, and then, they threw the parachute from the 35-high tower, the sheep was unharmed, and landed safely. And the first person to truly skydive successfully was the French young Gallerin. Gallerin rises 100 meters into the sky in Paris by a giant hot air balloon. He cut the tether and let the balloon go. After the basket detached from the balloon, it fell rapidly towards the ground. The people who were visiting let out a cry of surprise. But just as people were worried about his life, suddenly a large white canvas attached to the hanging basket opened like a mushroom, and slowly carried Gallerin to the ground. This was the beginning of human skydiving. Later, retired Russian artillery lieutenant Kedenikov invented the world's first foldable backpack parachute fixed to a person, and after improvement, this parachute was attached to the pilot for use in critical times. Depending on the need, different types of parachutes can be used. For the first time, St. Louis successfully parachuted an airplane. "Actually, I originally wanted to say that in modern society, the way of skydiving has also developed from the earliest skydiving from hot air balloons to airplane skydiving, parachute tower skydiving, towing skydiving, and today's adventurous people have invented skydiving from cliffs and skyscrapers.

In addition to the traditional stunts, fixed-point, aerial modeling, aerial parachuting and other events, the skydiving project has added aerial freestyle skydiving and aerial skateboard skydiving, which has evolved from pure competition to leisure, entertainment and extreme sports.

With the rise of BASE (BASE is an acronym for buildings, antennas, spans, and surfaces), this kind of skydiving competition from fixed objects such as steep cliffs or buildings is extremely dangerous and is known as it

"Deathmatch". The extreme sport of air skateboarding began to become popular in some countries in Europe and the United States, and athletes wore a special skateboard on their feet in addition to parachutes.

During the free fall, athletes use the power of the air to perform difficult maneuvers such as spins, somersaults and slides.

This event has been officially listed as an ESPN X Games event. Therefore, skydiving has become one of the most popular aviation sports in the world, and it has also become one of the most fashionable extreme sports for young people, and has even been developed into a highly skilled sports activity.

Spinners, somersaults, steering, stunt formations, passing batons, and even jumping off a plane without a parachute, getting a parachute from another parachutist in mid-air, etc., are breathtaking and eye-opening, but I feel that there are too many skyscrapers, buildings, antennas, spans, surfaces, etc., which are rich and colorful with modern social colors, and these ancients will be dumbfounded and dumbfounded when they hear it, chasing me for a long time, so it is useless to say more, so I simply omit it.

Hu Jiaojiao sighed and said: "It turns out that this is called parachuting, the purple moon girl is really knowledgeable, well-informed, just said it really opened our eyes, those people are really smart, without these ancients' vast sky, imagination and bold attempts and brave experiments, there would be no us today to do what we want and be free." Xiao Fei hurriedly added: "Yes, this is parachuting, parachuting refers to the parachutist jumping down after taking an airplane, balloon or other aircraft or other equipment to a high altitude, or jumping from a steep mountaintop, high ground, and with the help of aerodynamics and parachute to complete various prescribed actions before and after opening the parachute, and using the parachute to slow down the descent speed and land safely in the designated area. It is known as the sport of the brave for its thrilling and challenging nature. So all of us are well-deserved bravery. But we talked and laughed for a while, everyone in the sky and the ground for a toss, involuntarily rose hungry, listless feeling, Hu Jiaojiao couldn't help but pouted and said that she was hungry, but we looked at it, next to it are a barren mountains and mountains, thorns, wild grasses, where there are any small shops, so everyone invariably sped up the pace and walked forward.