Lord of the Desert

Chapter 221 Kinetic Energy Weapon
After thousands of trials, the new ultimate move was finally mastered.

Hong Fan walked to the iron bar with square steps, touched the fracture that was still warm, recalled the speed of the wind just now, and looked forward to Zixiong for a while.

"The framework has been run through, and the next step is some tinkering and familiarization."

He returned to the table and wrote down the experiment in its entirety.

The first sheet was folded and set aside, revealing the text underneath.

"Preliminary Research on Long-range Kinetic Energy Weapons".

Then Hong Fan opened the wooden box and took out twenty iron bullets from it.

To be more precise, twenty bullets with no casings and no primer.

These warheads were cast and polished by him in the blacksmith shop yesterday. Although they are not as good as pressed by machine tools, they are at least uniform in texture and suitable for use.

After the success of "gas" acceleration, he naturally thought of a weapon that was often used for hunting and competition in his previous life - the air gun.

The iron rod at one end of the yard was pulled out and replaced with a wooden target.

Hong Fan stood 30 meters away and flicked his thumb.

When there is a sound.

The bullet shot into the air, and was immediately surrounded by fine sand, floating in front of Hong Fan's shoulder.

More barren sand surged up, and with it as the center, it extended into a two-meter-long barrel.

Hong Fan slowed down his breathing, concentrated all his attention, and carefully adjusted the inner diameter of the gun barrel until he reached the limit of his current ability after five breaths.

This is the most difficult micro-management challenge he has faced since he got the sand world.

The rear sight and front sight are formed separately.

The "casing" wriggled slowly, drawing compressed air repeatedly.

Yanliujin intervened last, roasting the sand body to [-] degrees Celsius.

At this time, the internal pressure of the receiver reached two hundred atmospheres.

[Fire. 】

With a thought in Hong Fan's mind, the sand body that killed the warhead suddenly relaxed.

There was no fire at the muzzle of the gun, and there was only a loud bang of thunder, which was much quieter than Shunpo's.

A black shadow flew out and hit the left side of the wooden target.

Hong Fan waved away the large heat stream that drifted to his face, and stepped forward to look at the target.

The two-inch-thick hardwood was easily pierced, releasing many sawdust.

The warhead was embedded in the rammed earth a few meters away, deformed to a considerable extent, and could no longer be used.

After careful evaluation, Hong Fan returned to the stone table to record.

[First test:
Cast iron bullets, weighing eight grams, with a barrel two meters long and without rifling;

Muzzle velocity: 200 meters per second (visual test);
Muzzle kinetic energy: about 160 joules...]

The power of this shot is less than one-tenth of the conventional rifle bullet in the previous life.

The senses of the innate mid-level fighters are enough to capture and respond to small objects at a speed of 200 meters per second.

If it is taken by surprise, there may be a chance to hit, but the damage is far from enough.

But no matter what, the success of the first test still made Hong Fan very excited.

Afterwards, the remaining nineteen bullets were used sequentially, but the results were not satisfactory.

It takes at least 15 seconds to shape and fine-tune the barrel, and it also takes time to obtain the "high-pressure gas cylinder".

Therefore, the air rifles in the current state do not have the tactical significance in short and medium distances.

The problem is that after a long distance, the accuracy is obviously insufficient-after 50 meters, it is no longer even possible to stably hit the target.

Twenty experiments, twenty improvements, the problems summarized are very clear.

The first is that the accuracy of the barrel is not enough.

The weathered sand is not fine enough, and the ability to control the sand is also insufficient. As a result, the inner diameter of the barrel is far from a perfect circle and cannot fit the outer diameter of the bullet.

After each firing, Hong Fan could even vaguely feel the bullets colliding back and forth in the barrel.

This is predictable.

Gun barrel manufacturing has always been a problem.

Even the German MG42 machine gun during World War II still used a polygonal barrel.

The second is that the bullet has no spin, and the trajectory flutters after it is fired.

This is because there is no rifling.

Hong Fan doesn't know much about guns, so he can't be considered a military fan.

But based on his mathematical foundation and the few words he occasionally saw on the Internet in his previous life, it is not difficult to figure out the principle of rifling.

It is nothing more than making a coaxial spiral on the barrel so that the radius of the bullet is slightly larger than the positive line and slightly smaller than the negative line, so as to consume part of the kinetic energy during firing to increase the rotation and obtain better flight stability.

The rest of the details—such as the shape of the rifling with rounded corners is better than square corners, which can reduce air leakage, and the smaller the pitch, the more the muzzle velocity will be reduced, and the greater the speed will be brought—all can be imagined.

Although the theory is simple, the practice is another matter.

Before making a hydrocyclone, it could be further polished and corrected after casting, but now the sand barrel can only be formed in one piece.

If the sand control accuracy cannot keep up, there is no other way.

Hong Fan wrote down the summary and put the twenty bullets with different dead shapes back into the wooden box.

Then he reshaped the barrel and cast a bullet in fine sand inside the receiver.

Raise the gun to the sky, and after firing with a bang, the bullets can be seen to go upward for more than [-] meters, and then scattered all over the sky.

Today, Hongfan's precise sand control range is ten meters, and its influence can reach as far as 20 meters.

After this distance, the sand world is beyond reach, and the sand bomb will naturally lose its shape.

This is a bigger problem than accuracy.

If this method of killing must be carried with pre-processed metal bullets to use, it can only be reduced to tasteless.

Hong Fan sat at the stone table and thought silently.

Just when he was at a loss, he heard Tao Hong calling him, saying that Wu Ruyi had come to the door and was waiting in the front hall, as if something urgent had happened.

Hong Fan hurried over, only to realize that it was Jian Siyuan who wanted to see him, so he hurriedly rode his horse to the Martial Arts Academy.

There is more than one person in the chief office.

Except for Chief Secretary Jian, who was sitting in the middle hall, Zhou Haoran, Wu Hongling, Shi Yuanwei, and a strange secretary were sitting beside him.

As soon as Hong Fan entered the door, he felt the atmosphere was dignified when he saw that everyone was talking and looking at him.

"Hong Fan, I'm looking for you because I have something important to ask."

Jian Siyuan waved his hand to avoid etiquette, and asked questions straight to the point.

"I found out from the courtyard that you once created a first-grade life star killing method in Jinhai City, called 'Power Sand Wing'?"

"Is there such a thing?"

"That's true."

Hong Fan replied immediately.

When several people in the room heard the words, their complexions changed.

Zhou Haoran was nervous, while Wu Hongling, Shi Yuanwei and others were surprised.

"It is said in the document that this killing method can help you fly to a height of thousands of feet, and you can travel 320 miles in an hour?"

Jian Siyuan asked again.

"Yes."

Hong Fan nodded again, saying that he did his part.

"At that time, I was only in the same line of cultivation. Now I use this technique again, and I should be more diligent."

"Okay, please come forward!"

Jian Siyuan praised and pushed the map on the table away.

"Eight hundred miles south of Xijing, forty miles northwest of Lezhang County, Qifeng Mountain."

"It's Shenshichu (three o'clock in the afternoon), you are leaving at this time, when will you arrive?"

He is pointing fingers.

"Counting the break in the middle, we can arrive at Xushi at the latest (eight o'clock in the evening)."

As soon as these words came out, Jian Siyuan breathed a sigh of relief, while Zhou Haoran was overjoyed.

PS: I haven't taken any sleeping pills recently, and my sleep mainly depends on fate, so the rhythm is a bit abnormal.

In addition, after checking a lot of information, my brain was overloaded all of a sudden, and this chapter was even later.

In addition, add a setting that has not been mentioned, but should be taken for granted.

The super-distance control sand in the sand world has different power performances on different scales.

Take a simple example.

Assuming that Hong Fan can set off a sand flow weighing one ton, it is only mediocre in terms of destructive effect, which is a starting force of [-] Newtons.

But if this force can be condensed on smaller objects without damage, the effect will be outrageous.

For example, if it is used to accelerate a sand needle weighing one gram, it can obtain an acceleration of 100 million meters per second, which is much higher than the acceleration of ordinary rifle bullets.

Considering that the range of sand control is much longer than the barrel, it will take seconds...

(PS was added after release, not counting money)

(End of this chapter)