As the new day comes, Fang Nan, who is handling government affairs in the office, received an invitation from Guangzhou University, which was sent by students from Guangzhou University, inviting Fang Nan to participate in a flight experiment.

Seeing that it was an invitation to the flight experiment, Fang Nan happily agreed and wrote a reply to the students who sent the invitation letter, saying that he would participate on time.

Soon, Fang Nan's reply was sent to Guangzhou University and received a reply from the Grand Governor. Gao Xiang, the only three members of the flight interest group, cheered excitedly. After the cheers, the three told dozens of non-staff members of the flight interest group about the Grand Governor coming to watch the flight experiment.

Fang Nan had some impression of the flight interest group formed by several students at Guangzhou University. He often visited or gave lectures at Guangzhou University and communicated with students, among which some students said they wanted to fly into the sky.

Flying into the sky is a very interesting thing. Fang Nan and a few students who are interested in flying have a simple discussion.

Dong Yan, Gao Xiang, and Sun Weimao dreamed of flying to the sky. They also thought about how to fly to the sky. The first idea of ​​the three was to put a pair of wings on a person like a bird, and slapped his arms with wings and slapped them into the sky.

Fang Nan pointed out the problem in the three people's thinking. Birds can fly into the sky with their wings, which does not mean that people can also make wings and fly into the sky by themselves. If the wings are small, they will not provide enough lift. If the wings are large, they will not be able to flap their arms with the strength of their people.

In the end, Fang Nan provided Dong Yan, Gao Xiang and Sun Weimao with a new idea - Kongminglantern.

According to legend, during the Five Dynasties (907-960 AD), there was a Xin Qiniang who, when she was fighting with her husband, tied bamboo strips into square frames, pasted them with paper, and made headlights. Burning pine resin was placed on the chassis, and the lamp flew into the sky with hot air to serve as a military contact signal. This pine resin lamp is called Kongming lantern in Sichuan. The main reason is that the appearance of this lantern looks like the hat worn by Zhuge Liang.

Another theory is said that Kongming lanterns were invented by Zhuge Liang during the Three Kingdoms. When Zhuge Liang was besieged in Pingyang by Sima Yi, the entire army was helpless. Zhuge Liang came up with a clever plan to calculate the direction of the wind and ordered people to bring thousands of white papers to make countless lanterns, and then use the upward gravity of the smoke to carry them into the air.

Small lanterns rose one by one, and the soldiers in the camp shouted: "Mr. Zhuge is sitting on the sky lantern and breaking through!" Sima Yi believed it and led his troops to chase the sky lantern. Zhuge Liang was able to escape danger, so later generations called this lantern "Kongming Lantern".

The origin of the Kongming lantern is no longer important. The most important thing is that the Kongming lantern can really fly to the sky. If it is a big Kongming lantern, can people fly to the sky by taking the Kongming lantern?

Fang Nan told Dong Yan, Gao Xiang and Sun Weimao about the idea of ​​Kongming lanterns, and asked the three to study the principle that Kongming lanterns can fly, and have already verified the feasibility of people flying into the sky with the large Kongming lantern.

After that discussion, Dong Yan, Gao Xiang, Sun Weimao and some people who were interested in flying participated in the research. Not long after, Dong Yan, Gao Xiang, and Sun Weimao formed a flight interest group and applied for research funds from the school.

Interest group is a campus organization of Guangzhou University. Students and teachers can create interest groups or participate in one or even multiple interest groups. This interest group is a super simplified version of the People's Army Research Institute. You can write a plan and apply for research funds from the school.

In fact, all the plans submitted by the interest group are sent to Fang Nan, and funds will be provided for students to conduct research after Fang Nan’s approval.

The People's Army lacks researchers, and students from Guangzhou University can barely be used as researchers. As long as they study what is useful to the People's Army, Fangnan will support them. No matter how large the students' research projects are, the People's Army can easily support the funds required.

The Flight Interest Group only conducted research on Kongming lanterns in the early stages, and did not require much money. However, it took a lot of time for the Flight Interest Group to study the principles of Kongming lanterns to fly.

If it were non-People's Army's old intellectuals in the education system, they would never understand why Kongming lanterns could fly, but students from Guangzhou University could.

Gravity, buoyancy, fire, air, after understanding the relationship between these factors, the flight interest group understood the flying principle of Kongming lanterns.

Simply put, when ignoring the change in the volume of the Kongming lamp, the buoyancy magnitude of the Kongming lamp does not change. Heat the air in the lamp to reduce the density of the air in the lamp, thereby reducing the gravity of the gas in the lamp, so that the total gravity of the lamp is smaller than the buoyancy efferential force, so the Kongming lamp will rise.

After understanding the principle of Kongming lanterns, the flight interest group will study and create a larger "Kongming lantern". The new Kongming lantern can fly into the sky with a certain weight of items. The flight interest group began to apply for the next batch of research funds, which was more than ten times the research rent for the first time. Fang Nan also approved it.

In the new plan written by the Flight Interest Group to apply for research funds, Kongming Lanterns have changed and are developing towards hot air balloons. At that time, Fang Nan also spent a sketch of the hot air balloon in the document for reference by the Flight Interest Group. As for other things, it is better for students to study them themselves.

Research is a necessary process. If Fang Nan does it all, the research process will be less, and when science and technology develop to the point where Fang Nan cannot guide it, researchers will not be able to research, and technology will stagnate.

Hot air balloons, airships, and aircraft are all aircraft. Hot air balloons are the first to appear, with low flight altitude and slow flight speed, but hot air balloons also play a lot of role in the People's Army.

In military, when the two armies face each other, people can fly into the sky in hot air balloons and use telescopes to observe the enemy's arrangements, especially to guide the attack direction for the artillery troops.

For enemies who have never seen hot air balloons, you can also use a heater to fly over the enemy and throw flyers or other items to intimidate.

Of course, what Fang Nan is more looking forward to is the birth of airships and planes. The biggest function of airships is long-distance transportation, which is faster than carriages and trains, and is not restricted by terrain. It can transport supplies to places where roads are not built with dangerous terrain.

Even if the aircraft is built, it cannot be compared with the airship in the delivery of goods in a short period of time.

Airships and aircraft will not be born in a short period of time. At present, only hot air balloons can be studied, which is a relatively good development. If no one studies the aircraft, Fang Nan can only order people to establish the Aircraft Research Institute and select researchers to study it.

Scientific research, interest is a very important one, which can effectively improve the research speed.
Chapter completed!