Bright Sword starts with the grenade flat.

Chapter 245 Liu Xiu who doesn’t want to be a dragon
After Liu Xiu left the courtyard, as usual, he paid attention to the map of enemies and friends to see if there was anyone hostile to him.

That's right, Liu Xiu Tangtang Kongji, the reason why he dared to live in the courtyard was naturally because he had a map of enemies and friends.

If there is no map of friends and foes, Liu Xiu will naturally have to accept protection honestly. After all, it is easy to hide from open guns and hard to defend against hidden arrows. Even if Liu Xiu's martial arts has reached the highest level of martial arts, it still has not changed the relationship between flesh and blood. As for the attributes of the body, the brain and the heart have to be shot at once.

Since Liu Xiu's identity was clear, Liu Xiu had already caught more than ten guys who wanted to take his life while living in the courtyard.

So as Liu Xiu caught more and more assassins, he naturally understood that Liu Xiu's place was actually a trap, so as time passed, there were fewer and fewer people who wanted to assassinate Liu Xiu.

Of course, some people asked how Liu Xiu discovered these guys. In this regard, Liu Xiu could only use battlefield intuition to explain why he could so clearly distinguish the people who wanted to assassinate him.

In fact, the reason why Liu Xiu chose to live in a courtyard was because he wanted to take advantage of the plot to see if he could get any benefits. Another point was that Liu Xiu didn't want to transform himself from a dragon-slaying boy into the evil dragon he hated at first, and let himself become the same. The kind of condescending person that I once hated.

Before Liu Xiu's time travel, there were many examples of young men who slayed dragons and eventually became evil dragons!
············
"Director, this is the best bulletproof steel our steel rolling mill can produce now!"

After listening to the materials technician's words, Liu Xiu made some calculations in his mind, then shook his head and said:
"No, if this steel is used to make the fuselage of the Challenger helicopter, its weight will seriously exceed the standard. How can the horsepower of the helicopter's turboshaft engine be driven!"

That's right, Liu Xiu wanted to become a fat man in one go, and he wanted to build the most advanced Challenger helicopter in the 1950s that would be the most advanced in 70 years, but there were still big problems.

Therefore, if you want both high maneuverability and high protection, you can only work hard on the materials for manufacturing helicopters. Use high-strength but light-weight materials instead of ordinary steel materials to manufacture the helicopter fuselage.

Therefore, in the face of this situation, Liu Xiu could only sacrifice the protective performance of the helicopter. However, if a low-altitude flying combat helicopter like this sacrificed its protective performance, it would become a living target for the enemy in the air, and there would be no need to talk about an air raid!

As a result, the helicopter's dead weight has almost caught up with the maximum take-off weight, so it can't even carry fuel, let alone weapons and ammunition.

The most critical difficulty is naturally the problem of materials. As a combat helicopter for bottom-altitude raids, Liu Xiu naturally has strict requirements for its protective power. Liu Xiu's design standards require its fuselage, especially the bottom of the fuselage. It must be able to withstand fire from anti-aircraft machine guns with a caliber of less than 20 mm.

However, there are difficulties in material selection, because it is difficult for existing ordinary steel to meet Liu Xiu's design requirements. There is no way. If you want to meet Liu Xiu's design requirements, you have to increase the thickness of the steel plate. But once the thickness increases, then The weight of the helicopter has naturally increased.

Of course, because of his experience before time travel, Liu Xiu naturally knew what to do. Yes, it was natural to develop titanium alloy materials to replace steel materials.

You must know that most of the materials used in the fuselages of fourth and fifth generation fighters decades from now will be titanium alloys.

Compared with steel materials, the density of titanium alloys is much lower than steel. For example, the density of iron is 7.8, but the density of titanium alloys with titanium as the main material is only 4.5, which is only 5% of the steel plate. Seventeen. Of course, the density of aluminum alloy is lower, only 2.7, but the strength of aluminum alloy cannot be compared with steel and titanium alloy, so it is naturally not suitable for use as bulletproof armor.

However, titanium alloy can achieve the same bulletproof capability as iron at the same weight and thickness. In this way, the fuselage of a helicopter made of titanium alloy can be 43% lighter than the fuselage made of steel.

And this extra weight can naturally be used to carry ammunition and fuel!

For example, the famous Apache combat helicopter, its fuselage and even its rotors are made of titanium alloy, which allows it to ignore anti-aircraft machine guns with a caliber of less than 20 mm.

It is precisely because of this that it became a tank killer and shined in the Battle of Haiyuan. However, the anti-aircraft machine gun equipped with the tank was just scratching the surface of the Apache combat helicopter, and the tank itself could not break the defense. The main gun couldn't be raised so high, so the Apache combat helicopter got stuck right in the vital point! !
Of course, it is precisely because after the Battle of Hiyuan, the tanks of each group were equipped with anti-aircraft missiles, or simply equipped with anti-aircraft missile vehicles in the tank companies to defend against the threat of combat helicopters like the Apache.

However, technology is changing. With the application of small drones on the battlefield, especially the drones on the Big Bear battlefield are much more useful than combat helicopters. Drones worth several thousand yuan are equipped with armor-piercing armor. It can easily kill millions or even tens of millions of tanks with just one round. This price-performance ratio is much more cost-effective than the Apache.

However, it is only the 1950s now. Although Liu Xiu is a time traveler, it is simply a fantasy to develop a drone!
However, titanium alloys can be made now. After all, Mi Tuo and Su Tuo are already researching and have achieved some results, and Liu Xiu's friends and foes map allows Liu Xiu to directly use Mi Tuo without leaving home. The production technology of titanium alloys has been freed up.

For example, the TI-6AI-4V titanium alloy produced by Mizuo in has extremely high plasticity and processability.

Although the production and processing technology of this titanium alloy is highly confidential in Mi'ao, it is easy for Liu Xiu to obtain it.

Not to mention Mihao, even the alien spacecraft Liu Xiu on Jupiter's satellite Titan, which is 4.2 astronomical units away, can clearly observe the inside and outside!

And with Liu Xiu's observations over the years, especially after Liu Xiu had an explosion of thinking, Liu Xiu really saw something interesting about the alien spacecraft parked on Titan, that is, the power source of this spacecraft was actually Nuclear fusion reactor.

PS: The foreshadowing of Wandering Earth has been mentioned before. Otherwise, I’m afraid readers who support me won’t be able to accept it if it comes out suddenly, so I mention it in passing.

Of course, if Liu Xiu wanted to build a titanium alloy production factory, it would naturally be a big investment, so he would naturally have to ask the superiors. Otherwise, Liu Xiu would not have that much money to put into production directly. Of course, even if Liu Xiu had enough money, he would not have the superiors. approval is useless.

Of course, when he asked for the establishment of a titanium production and processing factory, Liu Xiu also focused on the importance of titanium alloys for fighter jets, especially the Peregrine fighter that shone on the Xiangao battlefield and completely crushed the Saber fighter jets. Made of titanium alloy, the performance can be improved to a big level.

Liu Xiu's requirements, especially for metals that can improve the performance of fighter jets, are still taken seriously. Therefore, the requirements for the titanium alloy production and processing plant were passed very quickly, and the funds and personnel were quickly in place.

(End of this chapter)