Huang Chengyan held it steadily, aimed at a wooden target a hundred steps away, and then pulled down the hanging knife, "boom", the naked eye of ordinary people can no longer catch such a fast crossbow arrow, as if it was still on the track on the crossbow arm in the last second, and the next second it has viciously pounced on the wooden target!

The powerful vector acts on the wooden target, and the wooden board with a thickness of almost a hand's width is like a piece of hemp paper that has been soaked in rain and has been exposed to the sun for several days......

Huang Chengyan, Fei Qian, and a few craftsmen slowly walked in front of the wooden target, and they couldn't help but be a little dumbfounded. This kind of power, not to mention the shield held by an ordinary sword and shield, even the body of the car formation placed by the baggage car is estimated to be able to penetrate unambiguously!

Huang Chengyan handed the crossbow to the master craftsman who made the bow arm on the side, and said, "You go and fix this bow arm first, and then go and open the string, and go to the side to try it in a row, and see how many crossbow arrows can be fired......

The master craftsman took the order and left, this is a detailed test that must be carried out, the crossbow has been replaced with a new material, and it cannot be said that it has not yet shot many rounds before it has been deformed, or what damage has occurred, then it is really a slap in the face.

Huang Chengyan looked at Fei Qian and said, "This method of virtuous son-in-law is indeed wonderful, but it is estimated that this cost is also quite wonderful......

Bowstrings of more than four stones are specially made, and the stronger they are, the higher the quality of the raw materials required. The bowstrings of the Han Dynasty were generally made of animal tendons, which were recorded in the Zhou ceremony, "Where the tendons are small, simple and long, and the knots are large." Small and simple and long, big knots and Ze, then it is a beast must be plagiarized, thinking that the bow, is not different from its beast, tendons and desires. ”

It is quite difficult to obtain strong animal tendons such as tigers and leopards, so most people use beef tendons as the main source of bowstrings, but to become strong strings of six stones, this is not something that all beef tendons can do.

Fei Qian suddenly realized that he seemed to be in a strange circle, adding a powerful bow arm, so he needed a strong bowstring, and then a stronger crossbow......

In this way, the cost is like buying a mobile phone in the next generation, originally only going to see more than a thousand, and then aiming at a two-thousand-plus one, thinking about it anyway, it will be a few hundred; As a result, when he was about to start, a more than two thousand next to him jumped into his eyes again, thinking that it was just as many as a few hundred anyway; In the end, I was shocked when I came down, and I didn't know that I had increased my budget from more than 1,000 to 3,000 or 4,000......

The cost has skyrocketed! For an ordinary bow, silk is fine, but a strong bow must use animal tendons, otherwise it will definitely not be strong enough.

In the late Han Dynasty, the reason why there were fewer and fewer crossbows and more bows was that the population was increasing, so the value of life was getting lower and lower, and the cost of these bows and arms and strong strings remained high, so in comparison, more people chose bows instead of crossbows.

Headache, Fei Qian frowned.

Huang Chengyan's meaning, Fei Qian is naturally very clear, this crossbow machine is full of power, but the cost is also full, and as an army, it is definitely impossible to just think about the power without calculating the cost, otherwise the tiger and leopard heavy tank with a handful of beards in World War II will not be defeated in front of the shoddy "welded can" T34.

What to do?

Although the bowstring of steel wire is a way of the future, don't forget that the present is the Han Dynasty, the Han Dynasty!

Without machine tools, without wire pullers, how can a large number of steel wires be made?

That's right, the silk puller!

First of all, pig iron must not be used for wire drawing, and that thing may shatter if it falls to the ground......

Only steel with very good strength and toughness can be used as a raw material. Fei Qian looked up at the sky, his head constantly searching......

The Han Dynasty has the technology of frying steel, although the purity of carbon can not ensure that each batch is consistent, but it is not a problem to use crude weapons to build weapons, but to draw wrought iron or even steel ingots into steel wires on a large scale, it is absolutely unrealistic to rely solely on manpower to calcine, and the wire drawing process must be solved!

And once the benefits of the drawing process are solved, it's a little scary......

It can not only be used for cranes, trebuchets and other mechanical equipment, but also can be used in construction.

There is also defensive barbed wire......

Once this is laid out, unless the stakes nailed to the ground are pulled out together, there is no way at this stage! Used to block intersections and quickly arm, it is simply a supreme artifact!

The dream is beautiful, but the reality is cruel.

Fei Qian had already seen how Huang's craftsmen made a steel wire, and beat it with red-hot steel with a hammer on an iron plate with grooves......

Not to mention the exhaustion, this yield is simply pitiful.

The amount of steel used may not be a particularly difficult thing for Fei Qian, he has iron ore! Although the area around Luliang Mountain in Bingzhou is not an area rich in iron ore, it is supplied to Fei Qian for mining and use, especially now that the Han Dynasty itself is difficult to protect and has no time to control the local government, all the iron ore produced can be directly allocated and used, so in terms of raw materials, the problem is not too big.

Now there are two main problems: one is the desulfurization technology of iron ore, and the other is the improvement of processing technology.

Desulfurization, the original way is to mix lime powder, in order to remove the sulfur and silicon in the iron ore, to form slag, as long as the adjustment of several times, to find a suitable ratio for the iron ore in Luliang Mountain, it should be said, it is only a matter of time.

In this way, the crude molten iron must have been above the average level, and then the Huang craftsmen fried steel forged to form steel ingots with suitable strength and toughness, and finally became a variety of weapons and agricultural tools......

So the preliminary desulfurization is probably like this, if you want a more effective way, you may need to find some alchemists, for this to continue to study will have a better method, but this steel processing technology......

So now the problem is one, the wire drawing process......

If it can be solved, all the problems can be solved.

The crossbow machine is made of bronze and can be poured into batches!

Frame structures such as crossbow arms can be made of wrought iron to find a suitable balance point in terms of weight and strength, and they can also be made directly by pouring molds!

Then, if the problem of the bowstring can be solved, the entire crossbow can be replaced with metal, and large-scale production will be possible!

And interchangeability, unified standards have become possible!

Everything is stuck on this bottleneck now......