Starting Today, I'll Work as a City Lord

"..." The corners of Liu Feng's mouth twitched. Why did she feel that the girl must have had a lot of interesting and stupid things in the past? She felt pitiful while being funny.

"It's not wood, but special fabric and steel as a support, and then you can make a hang glider for people to fly." Liu Feng said calmly, the hang glider reminded him a lot.

For example, can a hang glider cooperate with a hot air balloon to form an "air force" force? Of course, this air force is not the air force with planes and fighter jets on the earth, but a pseudo air force.

The hang glider must have a high slope, or factors such as headwinds to take off, but if a hot air balloon is used as a take-off point for the hang glider, the problem of limited terrain can be solved.

Once the problem of the limited terrain of the hang glider is solved, it will be very useful. The hang glider troops are in the sky, they can detect the enemy's situation, they can go deep into the enemy's rear, and as long as they are equipped with a parachute, they can sneak in secretly, and then perform a decapitation operation-perfect.

"I don't understand." Fleur said indifferently, she couldn't imagine how people could fly with cloth and heavy steel.

"You will know when you make it." Liu Feng said softly, asking him to explain the principle of lift and drag, even the girl would not listen.

But for the hang gliding unit, he decided to put it on the agenda and start personnel training, especially the need for at least four hot air balloons to serve as the take-off platform for the hang gliding tribe.

"Oh." Fleur replied indifferently, and stopped talking, looking at the blue sky quietly.

After staying in the sky for another ten minutes, Liu Feng saw the girl's slightly trembling body. It was clearly too cold and she was still holding on.

"Go down." Liu Feng said calmly. Before the girl could respond, he stopped pushing the bellows. When the heat from the charcoal was not enough, the hot air balloon descended slowly.

Fleur didn't speak, just looked at the sky quietly, until she reached the ground, she still didn't say a word. Today is probably a very happy day for her.

"Master, how's it going? Is it fun to be up there?" An Li's brown eyes were full of expectations, she trotted over and took Liu Feng's arm, and asked, "There shouldn't be any danger, right?"

"There will be no danger." Liu Feng shrugged and said.

As long as the hot air balloon does not fly too high, there is no danger. There is an airbag that can buffer the descent speed, just like a parachute, unless the airbag is completely torn and broken, or it encounters bad weather.

"My lord, is there anything to improve?" The old carpenter asked beside him.

"If the airbag is made bigger, it must be able to seat at least four people. This is too little." Liu Feng said slowly.

If it is used by the hang gliding troops in the future, the hot air balloon must accommodate at least four people, otherwise there will be a lot of supplies that cannot be transported.

"Yes." The old carpenter said respectfully, and immediately wrote it down.

"There is also a need to change the fuel, find some more flame-resistant materials, and fly into the sky in the future, it is impossible to fly for a short time and then come down."

Liu Feng thought for a while, and then said. "It must also dissipate a large amount of hot air, which is the key to a hot air balloon going to the sky."

He hopes that the hot air balloon can float in the sky for several hours without having to come down to refuel. Although one person can go up, and if the other places are filled with fuel, it can float for a longer time, but this is a bit tasteless.

"Yes." The old carpenter wrote it down, and he will pass it on to other research institutes. They are not in charge of the fuel, and there are research institutes dedicated to fuel research.

"Master, can I also take a ride in a hot air balloon?" An Li whispered, looking at Liu Feng expectantly with her brown eyes.

After the words fell, Mina and Eliza also stared fixedly at Liu Feng. This experience of being able to go to heaven is a once-in-a-lifetime opportunity.

Chapter 0408 wants to fly back to my hometown to see.

"Of course." Liu Feng smiled lightly. He would definitely satisfy Hu Erniang for such a small request.

"Yeah! That's great." An Li jumped up happily, with a brimming smile on her face, and a little nervousness in her eyes.

"Let's go." Liu Feng stretched out his hand to Hu Erniang with a smile, then turned to Mina and Eliza and said, "Just wait a moment."

An Li looked at Liu Feng's outstretched hand, her cheeks flushed slightly, this was the first time the young master asked her to hold hands, her small hand was lightly placed on Liu Feng's palm, and was held by Liu Feng immediately.

"Yes." The cat-eared lady said softly.

Eliza nodded slightly with emerald green eyes, "Okay."

Liu Feng took An Li into the hot air balloon. The charcoal had already been replaced once by the old carpenter. He pushed the bellows and followed the command of 'loosen the rope'. The old carpenter let go of the rope, and the hot air balloon slowly lifted off again.

The fox-eared lady was very nervous. After all, it was her first time to go to the sky, and she was snuggling in Liu Feng's arms. She looked around in surprise with her brown eyes, feeling the uplift of the hot air balloon, and her fox tail flicked back and forth on Liu Feng's thigh.

"Don't be afraid." Liu Feng felt An Li's nervousness, patted Hu Er Niang's back, and comforted her, "As long as the hot air balloon doesn't fly very high, it's very safe."

"Hmm!" An Li nodded her head lightly, her fox ears trembled, her nervous heart gradually calmed down, and she asked in a crisp voice, "Master, why can a hot air balloon fly by burning charcoal?"

"Hmm~~ How should I put it?" Liu Feng paused, thought for a while and said, "Anli, this world is more complicated than we imagined. For example, there are many things in the air that we can't see with our naked eyes."

"Ah? Is there something in the air?" An Li looked around with her big brown eyes wide open, but she couldn't help but pouted and muttered, "Master, are you kidding me? Is there something in the air?" what."

"No? Then think about it? Why do we breathe?" Liu Feng raised the corner of his mouth and said softly, "What is the breath we breathe?"

"This..." Enli's eyes were dull, yes, why are we breathing?What is the exhaled breath?Is there really something in the air?

"Let me ask you another question." Liu Feng looked at the stunned fox-eared lady, and said slowly, "Why can wood float on the water?"

"This..." An Li frowned, holding her chin in her little hand and thinking, why does the wood float on the water? Isn't it because water is like this?

No, why can the fish be in the water?Why can the stone sink?Can dirt sink?

Could it be the weight?No, the wood is so big, the stone is so small, and the weight of the two is not the same. Huoji?

Hu Erniang's clever mind can think of many things at once, but something is missing, and she can't figure out what it is that makes her think hard.

"Whoosh..."

Liu Feng pushed the bellows, and looked at Hu Erniang with a smile on his lips. This is the knowledge of junior high school courses on the other side of the earth. If no one breaks through the mysterious fog, they may be confused for a long time.

"Master, why? Why can stones sink to the surface of the water, but wood floats on the surface?" An Li pouted, looking at Liu Feng bitterly. She really couldn't figure it out. What is the reason for the two?

"Density." Liu Feng spit out a word softly.

Hu Erniang looked at Liu Feng in a daze, shook her head and asked, "Master, what is density?"