Even if you really want to use a gun, you can't go to the police station to find it, and it's best to find an automatic rifle. That thing Hong Tao knows where it is, but it's a little far away, and he can't go there for the time being by himself.

Since bows and arrows and guns are not available for the time being, can the slingshot be made or not? Hong Tao tried this weapon for three days in a row, and the conclusion was that it didn't work. The destructive power of the steel ball to the skull is certainly good, but it is not enough to penetrate easily, especially on the front.

It is said that this kind of power is enough to deal with a living person, and it will definitely make the other party lie down. But it doesn't seem to be very effective when used on zombies, just breaking the bones or even shattering them, as long as they don't obviously damage the brains inside, they are just like nothing, what to do, no anger!

If you increase the number of pimps, Hong Tao boasts that his arms have no divine power, and he barely pulls them apart a few times, which is not only too difficult but also affects the aim, his hands are trembling, and he can't hit accurately once more than ten meters away, and there is basically no second chance to shoot.

"It's better to be self-reliant......" I kept thinking about having dinner and didn't come up with a good source of weapons, so Hong Tao had to choose the most time-consuming and laborious method that was not necessarily easy to use, and made it himself!

What to make, bows and arrows and guns will definitely not work. Although the former has the technology and materials, it basically doesn't know how to use it except for himself, and there is no point in making it. The latter really has no equipment, no materials, no drawings, even if it is barely built, it is still useless without bullets.

"I've been mixed for several lifetimes, but you're still easy to use!" However, there is one thing that Hongtao can both make and use, and it is easy to popularize, and that is the crossbow!

Not to mention Hong Tao, as long as you practice a little and shoot a few more times, you can use it in early autumn and Zhang Ke. And this thing also has an advantage, it will not reduce its power in anyone's hands, and it will not affect its combat effectiveness because of technology and strength.

Compared with previous generations, Hongtao's method of making crossbows now can be said to be a change of shotguns, and the starting point is a steel plate crossbow, without improvisation. In fact, there is no condition to make do with it, and there is only one crossbow arm material that can be found at present, leaf spring!

Leaf springs, the full name of leaf springs, are commonly known as bow plates. Roughly speaking, several long strips of spring steel are stacked on top of each other and fixed to the axles to support the carriage.

In the past, the suspension system of automobiles used leaf springs, which were called hard axles. Later, independent suspension, cross arms, multi-link and so on were developed, which increased comfort and reduced load capacity. However, trucks and some vehicles that require heavy loads, the rear wheels still use hard axles and leaf springs.

Since ordinary buses don't use leaf springs, Hong Tao's house is in the second ring road, and most trucks can't get in, so where can he find leaf springs? The answer is very easy, tricycles, disabled cars, and more and more electric old mans, and the suspension system still uses leaf springs. For no other reason, this thing has a simple structure, cheap construction and low failure rate.

"I'll demolish, I'll demolish, I'll demolish!" If you want to talk about building cars, Hong Tao can only be a dealer, but if you want to talk about dismantling cars, then he is the commander-in-chief, chief engineer and small worker. No one needed it, one person went out with tools, and in two hours he dismantled a tricycle and two old man's music, dragging a large pile of spring steel plates and returning with a full load.

"Grandpa Hong, are you going to make a bow and arrow?" Zhang Ke saw the long strip and natural arc of the steel sheet, although he didn't know what it was, but the first thought in his mind was a weapon!

"Hey, hey, you're half right! Today I'm going to fight at night and get the spool! "Everyone likes smart children, and whoever Hong Tao likes is willing to teach whoever he knows, and he can't learn if he doesn't want to. So Zhang Ke became a temporary worker, responsible for serving tea, delivering water, and tools.

The leaf spring of the tricycle is not the same size as the leaf spring of the old man, the tricycle is relatively thin, 6 mm thick, 6 cm wide, more than 80 cm long, and the arc is 11 cm high. The old man's is slightly shorter, more than 70 centimeters long, but relatively thick, with 7 millimeters.

Which one is best for a crossbow arm? Hong Tao didn't know, so he had to do the same thing. The specific method is very simple, first tie the bow board to the steel wire to try the tension, if it is too hard, find a way to make it soft, and if it is too soft, add a short bow board to make it hard.

The actual result was that it was too hard, and Hong Tao was dissatisfied. Then it was time for the angle grinder to come into play, and with a spark of lightning, the ends of the 6-centimeter-wide tricycle arch board became 4 centimeters wide.

Try again, if it doesn't fit, cut it again. This work continued until about 8 p.m., when the crossbow arm was finally finalized. One is made with a tricycle bow board that is slightly longer, and the other is made with an old man's bow board that is slightly shorter.

Next is the crossbow, which is simpler, find a 5*10 wooden square and saw it 80 cm long. The narrow side is upward, and a shallow groove is rubbed out with an angle grinder to place the bolts.

There was a hole in the middle of the bow board to fix the bolts, and another hole was drilled underneath, and two 12 cm long bolts were fixed on the top of the wooden square, and it was properly formed.

The crossbow machine is made with the scraps of the cut bow board, and the angle grinder is used to grind it, what does not look like it, as long as you have made match guns, steel ball guns, and trolls when you were a child, you know how to get a crossbow machine. Two thin bolts are attached to the side of the crossbow body, so that the bowstring can be hung without spring.

Try the effect of the crossbow arm first and then talk about the details, lightweight and ergonomics, otherwise toss for a long time, lightweight, beautiful and practical, the result is that the crossbow arm effect is not good, and the front is all useless.

"Stretch...... Boom ...... Hum ...... "The crossbow arrow is the easiest, Hong Tao directly took a stainless steel chopstick and sharpened it and put it on it, stood five meters away, and pulled the crossbow machine against the courtyard door.

“…… Wash up and sleep, and talk about it tomorrow morning! "The chopsticks were accurately nailed to the courtyard gate, as for what to aim at, that was the detail, Hong Tao mainly wanted to see whether the pull of the crossbow arm was enough.

When he grabbed the tail of the chopsticks, kicked the courtyard door, changed from one hand to two hands, and still did not pull out a minute, the tensile test of the crossbow arm was basically passed. The chopsticks were pierced at least two inches, and the pine planks wrapped in white iron were pierced, and there was no problem in piercing the skull.

God seemed to know that Hong Tao had to work, so it rained lightly in the second half of the night, and it not only didn't stop until the early morning, but it also became heavier. Since God didn't want to let him go out, Hong Tao simply complied with the will of heaven and continued to improve the steel plate crossbow under the canopy.

After last night's test firing, the pull of the crossbow arm is enough, but there is a small problem, this pull can only be pulled by stepping on the crossbow arm with both hands, how can Chu Qiu and Zhang Ke use it, the strength of the two of them is definitely not enough.

At this time, there are two solutions, one is to use eccentric wheels, and the other is to use pulleys. In the end, Hong Tao chose the pulley block, although the eccentric wheel block is more effective, but it is also more complex and not as easy to find as pulley.

A pulley is welded at each end of the crossbow arm, and a pulley is also installed on one side of the position of the first third of the crossbow body, forming a set of fixed pulleys and movable pulley sets on the left and right.

The junior high school physics teacher taught us that the fixed pulley does not save effort, but it can change the direction of tension. The pulleys on both sides of the crossbow body are the fixed pulleys, which change the direction of the bowstring to pull back, and become the crossbow arm pulleys in the direction of the fixed pulley.

The pulleys at both ends of the crossbow arm are movable pulleys, and the junior high school physics teacher said that the movable pulley cannot change the direction of the force, but it can save force. How much do you save? Half of a moving pulley!

Knowledge is a wonderful thing, right, a simple four small pulleys, a few dollars of gadgets, can make a powerful crossbow that can shoot through a two-inch plank, into a toy that even a teenager can pull open!

Zhang Ke can indeed pull it apart and launch it up. However, this thing is still too rough, and it is difficult to grasp the shooting distance without Wangshan, which seriously affects the accuracy.

The rest is all delicate work, find the magnet bar in the curtain and suck the crossbow arrow into the groove on the crossbow body to prevent it from falling due to the movement. Groove the crossbow body and add a return spring to further improve the crossbow machine.

Grind the round and polish crossbow body wood, and do several hollowing treatments without affecting the tension of the crossbow arm, so as to reduce the overall weight and adjust the center of gravity as much as possible. Through many test shots, I probably found a landing point to take a walk and make a simple lookout ......

The rain has stopped, lunch has been eaten, and Hong Tao is still busy under the canopy. It's not enough to have a crossbow, you have to have the right bolts. There are only two pairs of stainless steel chopsticks, and they can't be attracted by the magnet, so it's useless.

In the past, the ground nails used to set up tents in the wild when fishing were good, but of course the original ones did not work, and those ground nails were improvised, short and soft, and they could not fix the tent when they encountered gravel and dirt.

The ground nails used by Hong Tao are made by a small processing factory, half a meter long structural steel, slightly thicker than chopsticks, as long as it is divided into two, and then the round head is ground into a triangular pyramid, and the armor-piercing ability has to be doubled!