"Don't worry! I have already told them the third one. Also, Zhao Tongwu and the others will help. Except for Zhao Tongwu, each of them will take care of one. Don't look around, just take care of you five." The fifth knife pointed at Qian Xiaohao and the five people behind him.

Yu Shan nodded and said to Qian Xiaohao: "In the secret realm of the East Wilderness, as long as you encounter a ferocious beast, you can only rely on your body to fight. There is no time for other means, so you are also protected."

"I'm positioning myself as a combat mage." Qian Xiaohao muttered.

"Fighting mage? What the hell is this? I seem to have told you that the plum blossom leopard and black ape I encountered are all masters of melee combat, and even I almost suffer a loss. A mage like you is as weak as a little chicken. Why should you fight with others?" Yu Shan glared at Qian Xiaohao and said.

"Okay, I surrender. I will do my best to do the mage, support it remotely, and will never fight in close combat." Qian Xiaohao immediately raised his hand to surrender.

Yu Shan said seriously: "I didn't joke with you. You must know that if you are careless, what you lose is life. Okay, I have told you everything I should say. Gu Hui, please be optimistic about the burden of each of you being responsible."

"We will follow you soon, and it will not be a burden in the future." Tang Baobao muttered.

"Be careful, get the supplies, I'm going to take you in." Yu Shan glared at Tang Baobao and took out a very thick tree heart from his hand.

This tree heart is one meter long and twenty centimeters thick, which is considered to be the largest tree heart of Yushan. I don’t know how much it consumes this time, so for the sake of safety, Yushan chose the largest tree heart.

The heart of the tree was activated by Yushan and immediately emitted a rich green light, which soon enveloped their group.

In just a blink of an eye, they entered the Demon-Suppressing Tower. Yu Shan just felt a dazed heart and felt that everyone had been teleported over. Then, he activated Shuxin again and did not give the fifth sword and the opportunity to observe the space of the Demon-Suppressing Tower, and immediately transferred them to the secret realm of the East Wilderness.

"Are we on the tree?" When the fifth knife saw the scene in front of him, he was immediately stunned by the trees under his feet.

"Don't shout, this is already the secret realm of the East Wilderness. This is the giant camphor tree I told you. If I hadn't teleported you directly to the tree, I wouldn't dare to bring you here casually." Yu Shan saw Yu Shui and others who were opening his mouth wide, as if he was about to shout out, and immediately warned.

At this time, the quality of soldiers like Zhao Tongwu and others was undoubtedly revealed. Although they were also surprised, after discovering that the environment had changed, they were not screaming or surprised, but they observed the environment very alertly and quickly prepared for battle.

"Don't be nervous. For some reason, this giant camphor tree is not occupied by ferocious beasts, so this is a safe area. As long as you don't get down the tree, there will generally be no danger." Yu Shandao.

"Since that's the case, then let's assemble the airship first?" said the fifth knife.

"Put it together! I hope it's not a mistake to bring such a large airship in this time." Yu Shandao.

"Don't worry, it's definitely not a mistake. Our airship has been modified, silent, carries a lot of heavy objects, has fast flight speed, and is very easy to adjust. It is considered a secret weapon of the military." The fifth knife said with a smile.

"You can't help! Will the military use this thing?" Yu Shan would not be fooled by the fifth sword easily. If it weren't for a small man named Tian Zhongcheng who could control the airship, Yu Shan would never have brought such a big guy here.

Of course, if no one could drive an airship, even if Yu Shan brought it in, it would be useless, otherwise Yu Shan would not have gotten a hot air balloon in for the first time.

Airships are not that easy to operate. Airships are called lighter than air vehicles because they use gases that are lighter than air and can produce lift. The most commonly used gas at present is helium, which can provide lift of 102 kg/m3.

Therefore, the load capacity of the airship is definitely enough for the Shan and the others to use, but the control is not that simple. Without professional personnel, ordinary people will definitely not be able to play with this thing.

It can be seen that Tian Zhongcheng is definitely a professional. Under his wisdom, he assembles the airship very quickly. In fact, there are not many things in this airship, mainly airbags, hanging baskets, an engine, and other small equipment. Yushan couldn't see what it was for a while.

The most troublesome thing is actually some things like gas tanks, which contain helium. Zhao Tongwu and the fifth sword and others brought one. If it was not enough, Yu Shan would have to go back by himself in the future and bring a large amount of helium in again. Now the most stored thing in Tianyuan Valley is this thing.

Soon, everything was made out by Tian Zhongcheng and placed it one by one on the ground in order, ready to be assembled.

Yu Shan knew that Tian Zhongcheng was the most familiar to airship among them. With his introduction, Yu Shan also began to understand the transportation they had used for a long time in the future.

The main part of the airship is the airbag - it contains helium. Yu Shan knows this, but after most of the backpacks appear in the so-called airbags, Yu Shan feels a little bad.

He felt something was wrong, because this thin airbag should occupy a small amount of space?

Why are there so many backpacks nowadays that they are all equipped with so-called airbags? There are too many, right?

Tian Zhongcheng's movements were very fast, so Yu Shan didn't ask him for a while. Yu Shan was a little stunned when he looked at the thing at his feet.

Head cone strip, front air bag, rear air bag, hanging curtain, sling, flight control wing surface - rudder, elevator, engine, air inlet, air valve, helium valve, pod - cockpit for passengers and crew.

After introducing it one by one, Tian Zhongcheng began to fiddle with the airship, intending to let it take off.

Airships control buoyancy in the air, which is very similar to the way submarines control buoyancy in the water. The airbag acts the same as the pressurized water compartment and is used to accommodate "heavy" air.

When the airship takes off, the pilot releases the air in the air bag through the air valve, and the helium makes the airship produce positive buoyancy relative to the surrounding air, so the airship will rise.

The pilot slows the engine down and adjusts the elevator to make the airship fly at a certain angle. The shape of the airship's cone head also helps generate lift.

As the airship rises, the external air pressure drops, and the helium in the airbag expands. Then, the pilot injects air into the air bag with an air pump to maintain the pressure balance with the helium.

Injecting air will make the airship heavier, and in order to maintain a stable cruise altitude, the driver must balance the air pressure and helium pressure to achieve zero buoyancy.

The pilot should adjust the air pressure difference between the front and rear air bags to keep the airship flying smoothly.

After takeoff, the airship can cruise at any altitude between 305 and 2135 meters, the engine can provide forward and reverse thrust, and the rudder is used for steering.

To lower the airship, the pilot needs to fill the air bag with air, which will increase the density of the airship and generate negative buoyancy for the decline. Similarly, the elevator needs to be adjusted to control the angle of the decline.

When not in use, the airship can be tied to a tie-in column, which can be placed in an open air or in a parking shed.

Here, it is impossible to provide a shutdown shed, and there are no columns left, so the stumps with cut-out branches become columns left.

As the gas kept rushing into the airship's airbag, Yu Shan finally knew something was wrong. He thought it was good, and the airship should be very big.

"Is the helium we bring enough?" After a few glances, Yu Shan knew that he needed to go back and also knew why so many helium tanks were prepared in Tianyuan Valley.

"It's definitely not enough." The fifth knife said with a chuckle.

Yu Shan gave him a blank look and said, "You guys have a lot of fun this time."

"Didn't you say the sky here is safe? Since it's safe, we might as well build an air base. I'm for the sake of my brothers and sisters." The fifth knife said naturally.

Looking at Qian Xiaohao and others who were commanded by Tian Zhongcheng, Yu Shan couldn't say anything else. There was a giant in the air that could really ensure the safety of Tang Baobao and others.

As a large amount of helium rushed into the airship, the airship's airbag became larger and larger. Even if you realize that the airship was very large, Yu Shan was a little stunned, because this airship was even bigger than Yu Shan imagined.

"This is not really an airship used by the military, right?" Yu Shan looked at the airship's very sci-fi appearance and felt that there was nothing else to tell him about the fifth knife.

Wu Dao laughed a few times and said, "I just said that this is an airship used by the military. You just don't believe it. In fact, you are different. Although the airship has many disadvantages, the advantages are beyond doubt."

After explaining the fifth knife a little, Yu Shan understood that military airships cannot avoid their inherent flaws, but they also have great development potential.

The disadvantages are very obvious. In the last century, two main reasons for airships being replaced by aircraft: high cost and excessively low speed.

Although the cost of airships is very low, its cost is astronomical.

The price of an airship generally varies according to its size. For example, a small, 40-meter-long soft airship costs about US$2 million.

If airships are used as large military transport tools, the number of construction in the early stage will definitely not be large, and the cost of carrying goods will increase sharply.

If it is abandoned, modern engineering materials and avionics will make modern airships much more advanced than their ancestors half a century ago, but their speed is still a headache.

You should know that the speed of modern jets is at least 6 times that of airships.

Of course, the slow speed of military airships is only relative to aircraft, while for surface ships, the speed of airships is quite fast.

But then again, the speed of the airship is both a disadvantage and an advantage.
Chapter completed!