Half a month passed quickly. After manufacturing countless failed high-pressure cylinders, Xiao finally mastered the qualified technology, completed the low-temperature separation of air, and could barely produce liquid helium.
The temperature of liquid helium is close to minus 270 degrees Celsius, which is very close to absolute zero. It is rare to find any element in nature that can be reduced to a lower temperature than this. What will happen if it is covered with a large amount of liquid helium?
The results are self-evident, but the production of liquid helium is too difficult. During the production process, it is even necessary to wrap the container with liquid nitrogen to maintain an ultra-low temperature environment.
So far, Xiao has only accumulated liquid helium for two seal scrolls, which means there are only two chances to take action. If he fails to successfully capture the enemy, he will have to wait until the next batch of liquid helium is produced.
In comparison, liquid nitrogen with a temperature that is not that low is much less difficult to produce. There are many liquid nitrogen reels, and there is almost no limit to the number. The consumption is even lower than the cloud bomb reels.
Many, it can be used as a conventional weapon on the battlefield.
In modern warfare, few people use liquid nitrogen as a weapon. On the one hand, its cooling efficiency is not as high as expected. It has no very good lethality against armored units, and against soft targets, it has no ordinary
Bombs are more cost-effective, but for ninjas, especially when the seal scroll can be used to store liquid nitrogen, they become a very useful weapon.
Even if you don't use the Liquid Helium Scroll, using the Liquid Nitrogen Scroll to deal with ordinary ninjas still has quite good lethality. It can also be used as a pre-skill of the Liquid Helium Scroll to lower the surrounding ambient temperature and make the Liquid Helium more lethal.
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On the day agreed with Sunagakure Village, Akatsuki's elite and Sunagakure ninjas set out together to intercept the Thunder Kingdom troops.
Almost all of the people dispatched this time were ninjas, and their strength was above chunin, but that didn't mean that an army composed of ordinary people was useless.
On the one hand, the army formed by ordinary people, under scientific and reasonable training, more or less has a certain amount of chakra. Using ninjutsu may not be enough, but using sealing scrolls is enough, so even if they face each other head-on
Ninjas, they also have certain resistance capabilities.
On the other hand, the air force is still a relatively new branch of the ninja world. Although major countries have more or less flying ninjas, they do not have their own professional air force, at least not an organized air force.
High-altitude reconnaissance, both in terms of safety and reconnaissance efficiency, is quite high, especially now that there are cloud bomb scrolls. Even if the pilot is flying a biplane, he can tear open the enemy on the ground when he discovers it.
Throw a scroll down.
It is hard to imagine that a biplane can be used to drop powerful cloud bombs. The power of a bomb is directly linked to its mass. Ordinary bombs naturally produce energy and oxidants by reacting with each other between the internal oxidants and reducing agents.
The greater the amount of explosive and reducing agent, the greater the power of the explosion. Of course, it may also be that the composition of the explosive itself is unstable.
Even if it is a cloud bomb, it only takes advantage of the reaction with the air and saves the mass of the oxide, but in the final analysis, the greater the mass, the greater the power. The load capacity of the biplane is to carry a few cluster grenades into the sky.
To such an extent, no one on earth can expect them to bomb the ground, but in the ninja world... a seal scroll may contain more than ten tons of explosives!
…
The Kumogakure troops and the sensing ninjas have their sensing abilities fully activated almost 24 hours a day. Even if their sensing abilities are not the Byakugan, which requires a blood vessel to be activated, which consumes a lot of blood, turning on the sensing ability for a long time will consume a huge amount of money.
But this is necessary. If the air is not scanned for a long time, planes will use the cover of clouds to drop bombs on their main force.
The Sensing Ninja still remembers the first time he encountered Akatsuki's reconnaissance plane. At that time, he didn't understand what the reconnaissance plane meant. He just saw a big bird-like thing coming out of the clouds, high in the sky.
After circling the Kingdom of Thunder military camp, he flew away.
He was about to report the incident to his commander and ask powerful ninjas to shoot down the reconnaissance plane in the sky, when he saw an inconspicuous little black dot fall down.
No one thought that such a small thing had much power until it landed about a hundred meters above their heads, and a violent explosion occurred above the heads of the military camp.
The fireball engulfed everything in the camp, and the shock wave tore the earth apart. It was like receiving a weakened version of the Shinra Tensei. But this bomb caused heavy losses to the Kumogakure camp. Hundreds of chunin and genin died tragically in the camp.
In his own tent, he was killed by a violent explosion without even realizing what happened.
As for suffocation... it won't do much harm to ninjas. Ninjas are very capable of holding their breath, such as the 50-50 who held it in the water prison for several episodes.
After suffering this big loss, the Kumogakure ninja began to continuously scan the sky to search for any enemy aircraft sneak attacks.
After tasting the sweetness once, Xiao's pilots began to play more and more tricks. At first, it was just ordinary reconnaissance, and they would drop bombs and bombs when there was an opportunity. Later, they found the enemy's camp and went out for bombing and sneak attacks.
The plane flown by ordinary pilots is easy to be discovered, so if you switch to a ninja to fly it, and use the transformation technique to turn yourself into a cloud or a big bird, you can avoid conventional detection to a considerable extent.
If this doesn't work, you can also find a ninja who knows how to escape. Transmission is not a ninjutsu with the Eighteen Forbidden Rules, but a ninjutsu that makes oneself transparent.
This move can not only make oneself transparent, but also make the objects that one comes into contact with become transparent. Otherwise, wouldn't the Translucent Ninja be unable to wear clothes on the battlefield? So in theory, they can also make airplanes transparent.
This is why the sensing ninjas of Cloud Hidden Village are constantly scanning high in the sky. They were once attacked by invisible biplanes. It can be said that they suffered heavy losses before they even reached the battlefield. Each and every sensing ninja was exhausted.
, but we still have to be on guard. If the enemy's plane becomes transparent and attacks again, it will be too late.
Just when he sensed that the ninja was exhausted to the limit and was about to change his shift, he suddenly discovered the ninja of Yunyin Village running towards him from the back of the team. He could already hear the shouts of the ninja without him having to notify him.
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"It's bad! People from Sunagakure Village and Akatsuki attacked our supply line. They...their fire escape is too terrifying!"
