‘After morning exercise, Liu Feng was having breakfast with Mina and others in the restaurant.

The girls didn't ask much about where Liu Feng had been all day yesterday. They just played around and grabbed food as usual. After eating, they went about their own business.

An Li had some free time today and followed Liu Feng and Mina to the study.

"crunch......"

"You've been working hard these past few days, and it's rare for you to have free time. Why don't you go around the city?"Liu Feng opened the door, sat in his seat, and looked at An Li who was sitting beside him.

"I won’t go. It’s still comfortable here, Master. I’ve had enough running around outside these days."Enri flicked her fox tail and chewed the dried fish she snatched from Mina's hand.

Mina stared at the side and hid the dried fish she just took out again.

"You can rest for a few days, it's not a big deal, just tell them to go down and let them do it."Liu Feng opened the drawer and took out a box of lollipops, which he brought from the earth yesterday.

There are twelve lollipops in the box, each one is transparent, with stars inside, which is unique to the earth. Some starry sky lollipops

"Wow, it looks good, thank you, Master."Enri took the lollipop, and her brown eyes could no longer accommodate anything else.

Mina glanced at the side, curled her lips, and said nothing, because she had finished her 'morning exercise' this morning and also got a pack. Dried fish, cumin flavored, she had hidden it long ago

"Bang bang bang......"There was a sudden knock on the door

"My lord, I am Yuffie."The voice of the dwarf Yuffie came from outside the door.

"Yuffie, is there progress on that thing? Liu Feng guessed, and then said,"Come in.""

"crunch......"

"Tap tap tap..."

After getting Liu Feng's response, Youfei opened the door and walked in.

"grown ups."Youfei had a look of excitement on her face and saluted Liu Feng.

"It seems that there is progress, has it been done?"Liu Feng looked at Youfei with a smile. This was the second time she came to see him.

The first time she came, she gave herself a big surprise and discovered a new alloy. So, will this second time come? What about another surprise?

"Sir, the shell of the Sky Fortress is ready. Please give me your guidance."Yuffie said excitedly. There was a trace of red blood in her eyes. It seemed that she had been working overtime on research during this period.

"So fast?"Liu Feng was surprised. After seeing the red blood in Youfei's eyes and the tiredness on his face, he realized why it happened so quickly.

"It's just the outer shell, the hanging basket and it haven't been installed yet, and the helium gas hasn't been resolved either."Yuffie looked a little embarrassed and lowered her head slightly.

"You've done a great job. As for the helium problem, leave it to me."Yuffie praised Yuffie. The shell was completed in much shorter time than he expected.

Helium is actually the gas filled in the airship. In fact, hydrogen can also be filled, but hydrogen is flammable and explosive. And helium Gas will not. Although helium is more expensive than hydrogen, Liu Feng finally chose helium as the filling gas for safety.

However, whether it is hydrogen or helium, it cannot be produced until Liu Feng returns to Earth to order a machine.

"Come on, let's go see it together."Liu Feng stood up, a little curious about what the outer shell of the airship made by Yuffie looked like.

"good."Mina and Enri nodded. They were also curious and a little excited.

They knew what Yuffie was doing. It was the Sky Fortress, and it could also take them across the Forbidden Mountains and back to the Kingdom of Brutus. Over there.

The group of people left the castle and got on the carriage to the Scientific Research Department. Yuffie was a little nervous along the way. This was the first time she had completed a research independently, and it was the Sky Fortress she hoped to study most. She didn't I hope there is something wrong.

Liu Feng looked at Youfei's hand holding the corner of his clothes and didn't say anything. He only knew the result after seeing the real thing.

"Tap tap tap......"

Twenty minutes later, the carriage stopped in front of the gate of the Scientific Research Department.

"Sir, we have arrived."Xinke's voice came from outside the carriage.

Liu Feng led everyone out of the carriage and walked towards the Sky Fortress Research Institute in the Scientific Research Department.

As soon as he entered the door, Liu Feng's sight was filled with an object. In his In front of you, a large 'football' is placed in front of you, supported by many wooden frames. The entire body is made of new alloys.

And this behemoth is the shell of the Sky Fortress, which is the core part of the airship. At a glance, It has a length of forty meters and a diameter of eight meters. There are four tail fins at the tail to control the direction, and there is a small propeller at the end.

Mina and Enri were also surprised, staring around the big football. 'It started spinning.

I don't understand how this thing can fly. Is it like a hot air balloon that needs to be set on fire to burn fuel?

"Maybe a little too big."Youfei looked at the expressions of Liu Feng and others and said a little embarrassedly.

"Not big, just a little small."Liu Feng didn't think it was big. It doesn't matter if the first test product is smaller."

"Master, can this really fly?"Anli asked suspiciously.

"Whether it is possible or not, you will know in about two months."Liu Feng was not sure. After all, this was his first time building an airship. He had no experience in the past and only had a lot of theoretical knowledge.

"oh."Anli nodded and didn't ask any more questions. Since the young master said he would know in two months, then he should wait another two months.

"Sir, this is the air release valve, and here is the place where the hanging basket is installed. The steam engine will be installed here to drive the propeller at the tail to rotate......."As soon as Yuffie mentioned the field in which she was expert, she began to talk endlessly.

In addition to the outer shell, the most important parts of the entire airship are the air release valve and the propeller. One is to prevent the filling air from expanding and bursting the outer shell, and the other is to control the direction of the airship. They are all indispensable things for the airship.

"The remaining part can be completed within a month and a half, all we need is your helium."Yuffie's pink eyes were filled with light. This was something she had dreamed of accomplishing.

"Within two months, helium should do the trick."Liu Feng planned that he would go back to Earth to find someone to buy the equipment, and then break it up and ship it over in batches. It should be about two months.

"Very good."Yuffie became excited.

"Okay, it's time for you to take a good rest, don't worry about the rest. Liu Feng said pretending to be serious.

"Yes, my lord."Yuffie nodded quickly. She really didn't have a good rest during this period, and she felt tired.

"You can go shopping with Catherine and Lucy, it's not good to stay in your room all day. Liu Feng thought that Catherine and Lucy were staying in the castle during this period, and couldn't help but suggest.

"OK, my lord."Yuffie responded.

"Third update,( ̄▽ ̄)Please support."

_Feilu reminds you: three things about reading - collection and recommendation

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