Castle of Black Iron

It was said that the underground difference engine network array of this largest human library was driven by geothermal energy. It was available around the clock. The entire library included a lot of information entry clerks and maintenance engineers, who maintained the normal operation of this huge difference engine system. As this difference engine system ran normally when the trouble-reappearance situation came into being, Zhang Tie could normally use this system even though he was alone in the library.

With the trouble-reappearance fruits that Zhang Tie used in Xuanyuan Hill, besides killing Han Zhengfang and Han Yuanhong, he also gained the largest legacy, this huge database in Xuanyuan Hill...

The largest human library and database became Zhang Tie's private study at this moment.

Besides this library, the database in the headquarters of those major human trade unions in Xuanyuan Hill was also open to Zhang Tie completely.

This was the largest achievement that Zhang Tie had made in Xuanyuan Hill.

Compared to this achievement, it was worthwhile for him to consume those trouble-reappearance fruits.

On one side of the operation panel of the inquiry machine, there was an operation manual. Zhang Tie skimmed it over rapidly before knowing how to manipulate it.

With the sound "Da da da", the metal keyboard carried a strong metallic texture. Zhang Tie had long borne the universal remote-sensing crystal communications information codes in mind. Therefore, he soon input the keywords into the machine.

He only input one key word——kinetic weapon!

After tapping on the key "Enter", Zhang Tie listened to the tinny and euphonious sounds of the running gears for 1 minute when the numerous fine metal pushpin-shaped bulges on the huge black metal curtain started to reverse and turn white. These white fine points connected with each other and formed a succession of words, which was a booklist.

Within Zhang Tie's imagination, these references were mainly humans' study of kinetic weapons before the Catastrophe.

"The Prospect of Kinetic Weapon on the Basis of Gutungs Explosion"

"Summary of Kinetic Weapons"

"Heavens-Based Kinetic Weapons——the Commanding Height in future Wars"

"On the Functions of Kinetic Weapons in Anti-missile and Anti-satellite Realms"

"The Report on the Current Situation of Kinetic Weapons after Nuclear Weapons"

"A Study on the Feasibility of Matching Large Surface Combat Ships with Electromagnetic Cannons"

"The Plan on God's Spear"

"A Study on the Application of Hypersonic Aerospace Aircrafts in Strategic Kinetic Weapons"

"Convention on Limiting Heavens-Based Kinetic Weapons——Protecting the Last Pure Area in the Sky"

...

Zhang Tie got over 40 books about kinetic weapons. He pressed the button on the operation panel and turned on the first book——"The Prospect of Kinetic Weapon on the Basis of Gutungs Explosion"...

A succession of words appeared on the metal pixel display in front of Zhang Tie.

In the following 3 hours, Zhang Tie digested all the knowledge that he could collect about kinetic weapons in the room.

Kinetic weapons were different than traditional weapons. Before the Catastrophe, humans' traditional weapons such as missiles, bombs and nuclear weapons killed, wounded or destroyed the targets through explosion; however, kinetic weapons killed the targets through their great kinetic energy instead of explosions.

Kinetic weapons had great destructive power. It was said that the inspiration for developing kinetic weapons originated from a big explosion caused by a meteor that collided with the earth of a subcontinent. When a meteor hit the ground with a great speed and mass, the kinetic energy and power that it released would be greater than that of the explosion of 1,000 atomic bombs. A high-speed collision of the meteor would turn thousands of square miles' land into scorched earth in a split second.

The power of kinetic weapon was only related to the object's speed and mass. As long as an object could reach a great speed, it could carry a great kinetic energy even though its mass was not great.

As for all the kinetic weapons that were invented by humans before the Catastrophe, to gain a great speed was the key for a great kinetic energy.

In order to gain a great speed, people had worked out many methods. Electromagnetic cannons' bullets gained a great speed in electromagnetic acceleration principle. As for heavens-based kinetic weapons, electromagnetic cannons were installed on the geostationary orbit of the planet and turned into rail cannons. The bullets being fired by rail cannons towards the earth carried a great initial velocity; additionally, the acceleration of gravity could make bullets move increasingly faster. When a kinetic bullet fired by a rail cannon touched the earth, its speed could reach hundreds of Machs with a terrifying power. Take the Heavens-based kinetic weapon mentioned in the Plan on God's Spear as an instance, it was actually an "iron spear" driven by a rocket booster after being fired towards the ground from the outer space. In this way, the "iron spear" could be accelerated two times like the bullets of rail cannons, which could definitely destroy the target on the ground.

Before the Catastrophe, people had already invented the interception technologies for ballistic missiles. Therefore, all the nuclear weapons' effects were discounted. However, kinetic weapons couldn't be intercepted. Because kinetic weapons had great power and couldn't be intercepted, all the human countries had been competing for developing kinetic weapons so as to replace nuclear weapons as the new strategic threat power before the Catastrophe.

Zhang Tie saw a form in a book, which listed the comparisons on the kinetic energy between various human weapons. After reading that form, Zhang Tie finally understood how terrifying his strike was.

Before the Catastrophe, the lightest tactic nuclear weapon that humans invented was David mini tactic nuclear weapon, whose explosive power was 41.8 billion Joules, which was equal to the explosive equivalent of 10 tons' TNT explosives. Zhang Tie's hammer carried 45 billion Joules. It meant that his hammer's kinetic energy was even 10% greater than that of a mini tactic nuclear weapon.

Power of nuclear weapon was dispersive; by contrast, kinetic weapon's strike was more concentrative and carried a greater destructive power.

Facing such a great destructive power, Zhang Tie's battle qi and the two indirect effects of Thor's Hammer, of course, the 7 jerk pastors of Sacred Light Empire were wiped out at once.

Among all the books, Zhang Tie was most interested in the thesis "A Study on the Application of Hypersonic Aerospace Aircrafts in Strategic Kinetic Weapons".

It was a proposition posed by a Hua scientist before the Catastrophe ——Produce a hypersonic aerospace aircraft whose moving speed could reach 10 times the speed of sound; throw an iron rod towards the target in flight. When the iron rod left the aircraft, it would carry tens of times the speed of sound. After entering the atmosphere, it would gain the second acceleration due to gravity. In this way, when the iron rode fell onto the ground, its destructive power would be similar to that of a nuclear weapon.

When he read this thesis, Zhang Tie's face turned increasingly weirder. Because he sensed that this proposition was referring to his current ability. With the flight ability of divine dominator, after reaching the speed greater than 10 times the speed of sound, he threw his spear towards the target...

By then, his spear's speed would be composed of 3 parts, namely 10 times the speed of sound, the initial speed that Zhang Tie's granted to the spear and the acceleration granted by the gravity...

Of course, he couldn't casually throw Thor's Hammer towards his enemy at such a high speed. What if it was a spear?

'My palm bolts could kill battle spirits in a split second. If my palm bolt increases its weight by a few times and gains a speed which is greater than 10 times the speed of sound, what about the kinetic energy of that spear? How powerful would it be?'

Zhang Tie stood in the room for quite a while. After that, he suddenly patted his head forcefully before rushing out of the room like the wind...

...

Only after a few minutes, the gate of an arsenal of Black Armor Army in the north of Xuanyuan Hill was shattered with a boom. Zhang Tie then entered it with an excited look.

As he couldn't use his space-teleportation equipment in the trouble-reappearance space, Zhang Tie could only look for the ready tools in the trouble-reappearance situation to verify his thought.

Thankfully, Xuanyuan Hill gathered all the delicate weapons in the world. It was very easy for him to find some weapons especially helmets, armors and spears in the arsenal of one of the top 4 armies in Taixia Country in Xuanyuan Hill.

What a Black Armor Army! There were all sorts of top-class weapons and equipment in the arsenal.

Zhang Tie found a copper-colored proper metal battle armor from those armors. After putting on the metal caligas, metal waistband, metal chest armor and metal wristers, Zhang Tie tried to fly at a high speed with the flight ability of divine dominator; after that, he came to the location of weapons and found some heaviest spears before leaving the arsenal.

Soon after he left the arsenal, Zhang Tie had flown off. With the ability of rapid moving skill and divine dominator, Zhang Tie soon reached his maximal speed——3,487 m/s.

The heaviest spear weighed 56 kg. However, Zhang Tie still felt it was as light as a straw. As he mainly wanted to try its power at a high speed, Zhang Tie didn't care about that.

Zhang Tie didn't mean to select a target on purpose. At over 1,000 m high, Zhang Tie noticed a building of over 20 floors. Closely after that, he threw his spear towards it forcefully...