Chu Fan knew that he could only return to Blue Star after completing the system mission. If an accident occurred while testing the hot air balloon, all his efforts over the past year would be in vain.
Chu Fan explained the hot air balloon's operating principles and precautions to Eunuch Li in detail to ensure that he could conduct the test flight safely and to accurately verify the stability of the hot air balloon.
After getting Chu Fan's consent, Eunuch Li immediately began to prepare for the test flight. He asked someone to find a few guards to help move the hot air balloon to an open area. After everything was ready, Eunuch Li asked people to add coal to the stove in the hot air balloon to start a fire.
As the coal in the stove burned more and more vigorously, the hot air balloon began to rise little by little until it reached a height of about ten feet from the ground and stopped rising. At this time, Eunuch Li had people slowly reduce the charcoal in the stove and let the hot air balloon begin to descend little by little.
After the hot air balloon successfully landed, Eunuch Li immediately ran to Chu Fan, bowed and said, "Congratulations, Your Majesty, congratulations, Your Majesty, the hot air balloon test flight was a success."
Chu Fan was also very happy at this time. He did not expect that the first hot air balloon he made could complete the test flight so smoothly. After Eunuch Li's successful test flight, Tang Ji and others also wanted to experience it for themselves.
Chu Fan then took Tang Ji and others to experience flying in a hot air balloon. However, due to the limited space in the hot air balloon, it could only carry two people at a time. After Chu Fan took Tang Ji to fly around Kaifeng City, the sky darkened.
If you were to fly a hot air balloon at night, not only would you not be able to see the ground clearly due to poor visibility, but you might also encounter unstable air currents, which would increase the risk of flight. So Chu Fan decided to continue taking the other women on a flight experience the next day.
Mu Xi and the other women were also reasonable people. They had made the hot air balloon with Chu Fan. They knew how to make a hot air balloon themselves, and they could ask Chu Fan to allow them to make their own hot air balloon in the future.
After Chu Fan had arranged everything, he returned to his bedroom to rest. However, the people in Kaifeng City were discussing this wonder. They were both amazed and frightened by such a huge object that could fly in the sky.
After all, unknown objects are always full of mystery and fear for everyone, especially when they appear in the sky, people will always unconsciously feel awe. When Chu Fan took Tang Ji on a flight, many people thought it was a manifestation of the gods, and they knelt down to worship and pray for the gods' blessings.
The officials in the court were also very concerned about this matter. Of course, these court ministers would not think that this was a manifestation of the gods. It was very likely that His Majesty had invented some new thing.
These court ministers were unable to go directly to the palace to ask Chu Fan, so they gathered again in the Royal Government Affairs Office to ask the prince in the Royal Government Affairs Office what the object was that was flying over Kaifeng City today.
How could the princes of the Imperial Affairs Office know what was flying in the sky? Chu Fan hadn't informed them beforehand about his hot air balloon project at the palace. Chu Zhenglin, the current head of the Imperial Affairs Office, could only promise, "I will go to the palace tomorrow morning to ask His Majesty what is flying over Kaifeng City. Once I get your answer, I will immediately inform the ministers. I hope you will be patient and wait overnight."
After receiving Chu Zhenglin's promise, these court ministers returned to their own residences, still wondering in their hearts how His Majesty could make such a huge object fly in the sky.
The next day, when Chu Fan was not yet fully awake, a palace maid reported that Chu Zhenglin was outside the palace requesting to see the emperor.
Chu Fan could also guess why Chu Zhenglin came to find him. You know, even women like Tang Ji yearned to fly, not to mention the group of court ministers in the court.
After Chu Fan dressed neatly, he asked someone to invite Chu Zhenglin in. Chu Zhenglin immediately bowed and saluted when he saw Chu Fan, saying, "Your Majesty, I pay my respects to you."
Chu Fan smiled and said, "No need to be polite. I know why you came to see me. Let's go. I will take you there and you will know."
After saying that, Chu Fan took Chu Zhenglin to the place where the hot air balloon was stored. After seeing the hot air balloon, Chu Zhenglin didn't understand why such a huge ball made of sheepskin could soar into the sky.
Chu Fan didn't intend to make Chu Zhenglin fully understand the principle of the hot air balloon. He just said, "Brother, have you had breakfast in the palace so early? If not, have breakfast with me and then we can discuss this in detail."
Chu Zhenglin replied, "Thank you for your concern, Your Majesty. I have already had my meal."
After hearing Chu Zhenglin's answer, Chu Fan did not force him. After all, in the entire Wei court, only he, the emperor of Wei, would sleep until noon before getting up. The court ministers in Wei basically got up very early and went to the government office to handle official business, so it was normal for Chu Zhenglin to have already had breakfast.
Chu Fan sat down at the stone table nearby and said, "Then, big brother, please wait in the palace for a while. When the sun comes out and the weather is dry, I will personally take you on a hot air balloon ride. Then you will understand the secret."
Chu Fan knew that for the people of this world, explaining gravity, aerodynamics, and other knowledge to them was like playing the lute to a cow. He only needed to let them know how hot air balloons flew through the sky. Even if the rest of the Wei Kingdom didn't understand the principles of hot air balloons, as long as they knew the manufacturing methods and operating techniques, they would be able to make a hot air balloon and fly it into the sky.
Although Chu Zhenglin also wanted to know the secret as soon as possible, he understood that his younger brother was now the emperor, and he was just a minister of the Wei State. He could not ask the emperor to do anything at will.
Chu Zhenglin asked, "Your Majesty, can I observe it myself first?"
Chu Fan was eating steamed buns and soy milk on the stone table brought to him by the palace maid. He had already explained the structure and operation of the hot air balloon to Eunuch Li yesterday. The reason he was not flying it now was simply because there was still moisture in the air during the morning court session, and the hot air balloon he made was not as perfect as those mature hot air balloons on Blue Star, so it was very difficult to take off during the morning court session.
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