The emperor's question did ask Yu Zhiqian, what is the use of a glider? Yu Zhiqian himself really didn't think about it, it seems that it is really useless, after all, the glider is not a real flight, and there are many restrictions, what is the use, Yu Zhiqian is really ......

"Your Majesty, gliders have great uses, you'll know later!"

Yu Zhiqian did not answer, Cheng Chumo jumped out for Yu Zhiqian to relieve the siege, with Cheng Chumo's order, the pilot who had not fallen to his death more than a dozen times began his flight again, first he stepped on the pedals on the glider hard, the glider began to accelerate slowly, and then the glider began to accelerate, when the glider came to the ramp, the speed began to get faster, and then the glider staggered and began to fly, about ten meters away from the ground, but it did fly.

Unlike bouncing on the ground at the ten-mile slope, this time the glider flew in mid-air, maintained a certain altitude, and was able to make a little turn in the air.

After flying for about ten seconds, something suddenly began to fall towards the ground on the glider, Yu Zhiqian was stunned for a moment, and looked at Cheng Chumo: "What fell just now?" Do you have glider parts? ”

Cheng Chumo smiled mysteriously: "Your Royal Highness the Prince, this is not a part of the plane, but a powder canister!" ”

"What?" Yu Zhiqian was taken aback, that gunpowder jar was less than 100 meters away from the emperor, is Cheng Chumo crazy?

"Your Highness, don't panic, that's a metaphor, it's a metaphor, it's a stone that is dropped, but it can be seen as a powder canister, Your Majesty just asked about the role of the glider, this is the role of the glider, after having the glider, our soldiers can fly into the air and drop the powder canister above the enemy's head!"

Yu Zhiqian's eyes lit up when he heard it, the emperor's eyes lit up, Yu Zhiqian looked Cheng Chumo up and down, this guy is good, he suddenly opened his mind, tsk, this idea, I didn't think of it just now, I couldn't help but give Cheng Chumo a thumbs up: "This idea is good!" ”

"Yes, Cheng Guogong gave birth to a good son!"

The emperor also praised him, Cheng Biting Jin's face turned into a smile, all these years, for the sake of Cheng Chumo, Cheng Biting Jin was heartbroken, and now Cheng Chumo finally has a little bit of interest, and the slap fell directly on Cheng Chumo's head: "Don't be proud, learn from the prince!" ”

"Father taught me a lesson!"

The glider finally hovered in the air for about two minutes, and finally slowly fell into the lake, but he was not discouraged by the process: "Your Majesty, because the power of the glider is the wind, so the glider cannot stay in the air for too long, and now the students are ready to add a power system to the glider, maybe they can stay in the sky for a long time in the future!" ”

"Yes, come on!"

That being said, the visual impact is too great for many people who see someone flying in the sky for the first time, but they see someone get into a glider and then fly around in the air, something that only the gods can do in mythology.

After praising Cheng Chumo, Yu Zhiqian took the emperor to a large open space, on the open ground, a bamboo basket was placed on the ground, with a lot of ropes tied to the edge, and there was a huge fire gauze in front, this kind of fire gauze is asbestos cloth to put it bluntly, this thing is everywhere in the Yu Tang Empire, Yu Zhiqian found it without effort, improved it slightly, and temporarily became the main material for the hot air balloon, of course, it is only the material near the mouth of the fire ring, the asbestos is a little heavy, and all the hot air balloons made of asbestos basically can't fly.

"This is a hot air balloon? Can it make people fly? ”

The emperor looked at the hot air balloon in front of him, and some didn't believe it, after all, it was a bamboo basket and a piece of cloth, and if he wanted to say that it was flying, the emperor didn't believe it.

"Father, wait a minute, hot air balloons can indeed fly into the sky!" Yu Zhiqian said with a smile, and at the same time began to get busy quickly, compared to the glider, this hot air balloon is much more troublesome, first of all, you need to make the ball bulge, after Yu Zhiqian passed, he saw that some students were opening the mouth of the cloth bag, and some people were holding the blower on their feet, and they were constantly filling it in.

The hot air balloon began to slowly inflate little by little at a speed visible to the naked eye, and soon, the hot air balloon, which was very dry like a piece of cloth, began to inflate, and finally began to float towards the sky little by little.

"Father, wait a little longer for this hot air balloon to take off!"

The emperor nodded: "This is a large Zhuge lamp, right?" ”

Yu Zhiqian paused for a moment, and then he understood, Zhuge Liang became the minister of the previous dynasty in this era, and there was also a Wolong in the Three Kingdoms era, but it was called Zhuge Dark, and he invented this kind of lamp that can fly into the sky, and it was called Zhuge Lantern by later generations.

"Yes, Father, it's a large Zhuge lamp, but there are still some differences in the middle, such as this flame-breathing device!"

Yu Zhiqian doesn't know much about hot air balloons, but he just roughly said a line of thought, but he didn't expect that this group of little guys would be able to make hot air balloons, and Yu Zhiqian felt very magical.

Soon the hot air balloon was completely inflated, with the bamboo basket below, flew into the hollowing, several thick ropes pulled the hot air balloon to prevent him from flying away, the emperor looked at the hot air balloon in front of him, his eyes burst into a blazing light, and looked at Yu Zhiqian: "Can this fly?" How high can you fly? ”

Yu Zhiqian thought for a while, and finally shook his head, he didn't know how high Erchen would fly, but it was definitely much higher than a glider! “

"How do you land?"

This question was asked to Yu Zhiqian, and Yu Zhiqian really didn't know how to land, so he could only pull Lu Su and others, who were in charge of researching hot air balloons, over.

"How does this hot air balloon land?"

Lu Su first saluted the emperor respectfully, and then slowly said: "Back to Your Highness, this hot air balloon landing is to close the flamethrower valve, and slowly let the hot air balloon land, we have conducted several tests, and we can land safely, please rest assured Your Majesty and Your Highness." ”

Don't worry, rest assured, Yu Zhiqian knows very well in his heart that before the inert gas is studied, the hot air balloon is not a safe thing, and it may explode at any time, anyway, Yu Zhiqian doesn't dare to take this thing casually, the ghost knows if it will fly and the people will be gone!

"Your Majesty, the hot air balloon is ready to take off at any time!" After Lu Su received the signal, he once again saluted respectfully.

PS: The epidemic is serious, everyone pay attention to ensure their own safety! ~Happy New Year