After the light gradually dimmed that day, and the crossbow arrows were shot out, there was no danger of being found, Tang Yizhou stopped testing.

Look at the watch, it is 7:42 in the evening, which is the quietest moment of the day. The sun has set and the fire-like sunset has dissipated almost. Only a faint ochre red sky, dark distant mountains, thin evening breeze, and insects are roaring one after another...

At night, it finally came.

Tang Yizhou curbed the horror movie scenes about the night in his mind, quickly packed up his things and retracted them back into the cornfield, placed several boxes of boards on the trolley on the ground, spread the quilt, put the trolley aside, put the stringed crossbow on it, and then...

"Why did my grass lose half the battery again?"

Tang Yizhou was shocked. He had twelve grids before, so he tried to shoot the crossbow fifteen times, but in the end he lost half the grid's power. He didn't think it would take much power?

This is really unbearable. It can’t be. This power is still responsible for daily physical energy consumption and daily food supply, right?

"Then you have to keep eating!"

Tang Yizhou jumped up decisively, took advantage of the faint sky light to break a pile of green corn, and ate it wildly.

It's strange, there's no serious feeling of fullness, but there's nothing wrong with it, just like there's a bottomless pit in your stomach.

At this time, the sky was completely dark, so he did not pick up the corn anymore, but lay on his temporary bed, closed his eyes, listened quietly, and was frightened, but soon he felt that this would not work and would scare himself to death.

So he tried his best to think about the fifteen test shots just now.

Fifteen times were not many, but it was enough to give him a certain understanding of this rough crossbow. After all, theory must be combined with reality, and proficiency can make perfect.

"It is not enough to make a crossbow arm composed of a bow and bottom plate. You need to add another one... two pieces tomorrow."

"The hard straightness of the crossbow machine is still not enough. I need to weld more steel bars on it tomorrow."

"The shape of the clamp requires minor modification and polishing, and the position of the clamp also requires minor adjustments."

"And this crossbow string is really unsolvable, but the leather can be cut thinner to make it more evenly, and then tied to the knot rope. This takes into account both strength and makes the crossbow string's ejection center of gravity more consistent."

"No need for too much, just a fifty-meter effective range..."

Tang Yizhou thought about it one by one, but his fear of the night was reduced a lot. After he looked at the watch with a flashlight, he found that it was already ten:30 in the evening. At this time, he looked at the attribute bar again and was stunned, because at some point, his power had returned from eleven and a half to twelve.

After confirming several times, he was finally surprised to confirm something, that is, the dozens of green corn he had just eaten, to be precise, thirty-five, which gave him half the battery.

This is not easy. This is a big joy. Finally, there is no need to worry that if he encounters a rainy season, he will be burping because of insufficient power.

Moreover, since green corn can provide electricity, other foods must be OK. Even the higher the quality and higher the calories, the more food can provide.

Well, at least Tang Yizhou himself believes that, because the law of conservation of energy, Mr. Newton’s coffin is thick and will not be overturned easily...

In addition, he even expanded along this idea. Will the temperature drop below zero degrees, and the electricity consumption will increase, such as Teiula in the bitter and cold areas of the north...

Therefore, a safe house that can provide life security, warmth and food reserves is a must.

Of course, for the time being, it is still too early to talk about the safe house. The next focus is still crossbows. Without weapons, the sense of security in my heart is always wandering and fluctuating under the horizontal line.

"Tomorrow's morning, recharge the charge, and correct the crossbow, cut and polish the crossbow arrows. In the afternoon, go to that house to see it. It's meaningless to hide here."

Tang Yizhou suppressed the idea of ​​continuing to eat green corn to recharge his charge. It was not that he had a far-sighted vision, but that it was too dark and he dared not move...

Just like that, I held my ears and didn't dare to relax and be vigilant for a while, it was impossible to sleep.

Torment, torment, purgatory, purgatory.

When there was a glimmer of light in the sky, nothing terrifying happened. Tang Yizhou finally couldn't stand it and fell asleep. Before going to bed, he took a daze and his battery dropped half the space. But this time he was very sure that this was the reason why he stayed up late... After all, staying up late hurts his body.

When he woke up again, not only was the sky bright, but the sun was rising so high. Look at the time, it was nine o'clock in the morning, and he missed too much sunshine.

Carefully crawled out of the cornfield, lying in the grass, receiving sunlight, holding a monocular lens, carefully avoiding the reflection of the sun, and starting a daily day.

I observed it in the grass for an hour and found nothing abnormal.

Tang Yizhou then went to the other side of the cornfield, with sunlight on it, cornfield behind it, grove in front, and crossbows where you can test crossbows.

Here, he first added two bow boards to the crossbow arm of the crossbow, and then welded it with iron bars to cut out the gaps that are conducive to binding the crossbow strings at the same position.

This time, he first tried to polish the gap, remove the edges and corners, and then wrapped it with a canvas strip to prevent the bowstring from being cut. The conditions are limited, so this is the only way.

Then, he used more iron bars and steel bars to strengthen the crossbow machine, because it is very important that the crossbow machine bears the force pulled from the crossbow arm. If it is not straight enough and has a little twist, the shooting will inevitably be affected. This is the truth that Tang Yizhou suddenly realized during the test yesterday evening.

Then, he removed the machine, used cutting skills to process it more carefully, and added a safety hook device from the original hook design, striving to make it more smooth and cute, and to pull it smoother...

Of course, it also includes the position of the mechanical cover, and moved backward by five centimeters on the original basis, because in this way, the distance between the crossbow arm doing work can be increased, which seems to be a greater force on the catapult of the crossbow. Of course, it is more effort to turn the string, which is a test of the overall structural strength of the crossbow.

To this end, Tang Yizhou added some iron bars to weld more densely to ensure that it would not hurt itself.

The last thing to deal with is the bowstring. Spread the bowstring from yesterday, cut it again, and add some new leather thin strips, weave, tie, and knot ropes, try to be as tight and delicate as possible, and try to be consistent in thickness. Finally, I get a bowstring that is about the thickness of a thumb. I don’t know the other properties, but it is definitely strong enough.

After wrapping it around the crossbow arms again, Tang Yizhou sat down, stepped on the crossbow arms with both feet, took a breath, and then used force with both hands to slowly pull back.

Because of the addition of two bow boards, it was very difficult to pull again this time, but it was still able to pull, and both bow boards bent slightly.

Tang Yizhou was secretly happy. After all, he already knew that his strength was at least twice as high as he had been through time.

As a truck driver and loader before traveling, I was actually quite powerful in Kong Wu, so it is difficult to pull twice as hard as I can now. There is no doubt that the tension of the crossbow arm is enough.

Of course, he estimated the above data himself. As a cargo transporter for many years, he is still sensitive to the weight of objects. The overall error will not exceed ten kilograms...

I didn't dare to pull it too fast, so I slowly stretched it, strengthening the strength bit by bit, allowing the crossbow string to go back little by little, and confirming the bearing status of the bow string. I loosen the crossbow string twice in the middle, untie it and set it a few centimeters long to ensure it can be hung on the safety buckle above the machine bracket.

At this point, the entire winding process is fine, and the crossbow that bears the maximum tension is normal, at least it is normal to see it at the naked eye.

Then Tang Yizhou slowly loosened the crossbow string again, and while continuing to bask in the sun to recharge the charge, he cut and polished the steel crossbow arrow.

This was a technical job, and it took him an hour to make the steel crossbow look smoother and lower the weight.

In addition, according to yesterday's test shot, in order to increase the destructiveness of the crossbow arrow, he specially found some steel heads in some corner waste, cut them into sharp inverted triangles, and then welded them to the front section of the crossbow arrow, so that the center of gravity is moved forward, forming a cone-headed crossbow arrow, which increases the damage.

Anyway, based on the physics knowledge learned by Tang Yizhou in junior high school, the shooting distance will be shortened by moving the center of gravity forward, but will it be more stable?

Well, probably that's it... Don't blame the academic masters passing by...

After all, the crossbow he made now does not seem to lack ejection power, and he does not need to snipe from a long distance. Just kidding, he does not have the shooting ability. Thirty meters is the effective sniping radius he temporarily set for himself.

He only needs to hit every shot in the men's 30-meter archery competition.

In addition to adding arrows and moving the center of gravity forward, Tang Yizhou also shortened the length of this crossbow arrow from fifty centimeters yesterday to forty-nine centimeters. If the next test is not ideal, he will continue to shorten or lengthen.

Because he didn't know what the most suitable crossbow arrow should be, and he could only test it again and again.

The answers in the official textbook may not be suitable for his homemade crossbow...

Everything was completed and the time was already 12 o'clock noon. Tang Yizhou replenished three grids of electricity by basking in the sun, but the modification and processing this morning consumed six grids of electricity...

Next was the test. He first used a monocular telescope to conduct an hour-long investigation in all directions. After confirming that everything was normal, he came to a small forest on the north side of the farmland by crawling forward. Here, he selected a tree with a diameter of more than 30 centimeters, and then opened a distance of ten meters, so he couldn't get more because he was worried that he wouldn't hit the shot...

And this time, he tested the shooting power of the crossbow.

Proficiently wind the strings, put crossbow arrows on the buckle of the buckle, slowly loosen the safety, let the bowstring and the buckle be pushed together, and after confirming that there is no problem with the center of gravity, Tang Yizhou then raised the crossbow, pressed the crossbow on his shoulder, relaxed, aimed, and after confirming that everything was foolproof, pull the buckle!

After this modification, especially after adjusting the position, the mechanical brackets were very different. After only three times, they were bounced up very lubricatedly. In an instant, the tension formed by the crossbow arm was quickly released through the bowstring, like a mountain collapse, like a crack in the ground, and like a sky collapse...

Well, it was actually just a soothing sound, and there was no special effect. The heavy crossbow just swayed slightly, and everything was over, and I was still not satisfied...

As for the crossbow arrow, of course it hit, which was a milestone event. Although Tang Yizhou aimed at the center of the tree trunk, the crossbow arrow was on the edge and almost broke off the target.

However, this is not the point. The point is that this crossbow arrow directly penetrated the entire tree trunk. Oh, it didn't. It just formed a terrible crack ridge at the other end of the tree trunk, and some of the trunk fibers broke directly...

But even so, it is equivalent to penetrating more than ten centimeters.

Even the special welded arrows make the penetrating holes on the tree trunk particularly hideous.

This is true for trees, what if it were flesh and blood?

Unfortunately, the enemy of Tang Yizhou is an iron creature!
Chapter completed!