Three Kingdoms, at the beginning of the game, recognize the thief as the father, hit the spectacle,

As for the other people present, those soldiers trained every day and were familiar with such a scene, so the reaction was not even as obvious as when the catapult came.

Glancing around secretly, he found that Zhang Yan, who was the only one who looked like this, suddenly became a little embarrassed.

Ignoring his small movements for the time being, after the row of artillery fired at the same time, the space of 200 meters was almost instantaneous, and the projectile with huge kinetic energy hit the only remaining section of cement concrete fortification.

Most of the soldiers didn't have Zhang Yan's good eyesight, and they could still catch the afterimage of the cannonball.As ordinary people, these soldiers could only see a burst of white light from the artillery positions, and then there was a burst of violent bombardment and breaking sounds from the fortifications in the distance, and the smoke and dust, which was much larger than before, also drowned the entire fortifications .

Regardless of the situation of the first round of shooting, the gunners of the artillery battalion knew that it would be difficult to hit the target directly with uncalibrated shooting, so they were not in a hurry to see the results, but led a group of people to clean the barrel, Return the receding sports car to its place, and start some shelling preparations before getting the results of the first round of shooting.

But soon, a burst of exclamation came from the group of infantry soldiers who were closer to the stone wall, that is, the group of sword and shield soldiers.

……

"Fate... hit!"

……

"The shelling just now hit!"

……

This exclamation made the nearby soldiers scramble to use it to check the results. At the same time, it also made the artillerymen in the distance prick up their ears one by one, wanting to see the result of the shelling just now.

The breeze blew away the floating dust on the ground, and no one thought that this was just a test shot to calibrate the direction, and a shell actually hit the concrete wall head-on.

And now, that metal cannonball is firmly stuck on the cement wall.

……

"Beat... smashed?"

"No, in order to simulate the effect of the actual city wall, the concrete wall was built at least two meters thick by the people of the Science and Technology Department. Even if the artillery directly hits it directly, it may not be able to smash the entire city wall with one blow, right?"

Staring hard at the shelling site in the distance, Zhang Yan wished he could go there and see if the concrete could withstand the bombardment of the cannon after it reached a certain thickness.

It's just that the experiment is still going on. When the second round of artillery fire is ready, the soldiers who were still around the fortifications have already dispersed, and they are waiting for the person in charge of the experiment to give an order to see what happened. What would be the effect of a calibrated artillery firing a salvo on the wall.

After all, this salvo situation is more in line with the actual usage scenario.

……

"fire!"

……

Chapter 51 Changing the Way of War and Building Bridges

"So, the concrete fortification that was directly hit by this shell is also embedded in the stone wall?"

……

In the early morning of the next day, in the Mansion of the Marquis of the Kingdom of Wan in Lujiang, a projectile made of pig iron was placed on Zhang Yan's desk.

The results of yesterday's experiment have come out, and the projectile that successfully hit the cement fortification in the first round of test firing was also recovered by everyone and handed over to Zhang Yan.

In this era when the artillery was just starting, the ammunition used to fill the artillery was just a solid hard iron ball, and there were no such things as hoods and primers, let alone the beautiful ammunition like the ammunition of later generations. streamlined shape...

Before the development of fluid mechanics, such a design was difficult to appear on weapons used by the army.

Therefore, even Zhang Yan can hold the ammunition directly with his hands to watch without worrying about any danger this "iron ball" will bring him.

The effect of the artillery bombardment was still very significant. After the entire artillery position composed of five artillery pieces fired, it immediately caused huge damage to the initially damaged fortification bunkers.

It can be seen from the specific results that although the artillery produced by Lujiang is still very primitive, in terms of firepower projection, it is already much stronger than the traditional Chinese thunderbolt chariots and other siege tools.

In addition, artillery can play a defensive role to a certain extent, so even if the cost is ten times higher than tools such as thunderbolt cars, it already has considerable practical value.

For various situations such as quarter charge, half charge, and full charge, Zhang Yan watched those people test separately yesterday.

There is no doubt that when the current artillery is fully charged, even a two-meter-thick concrete wall cannot withstand the bombardment of this weapon...

No, maybe it should be said differently.

This simple and convenient cement fortification, even in the face of powerful firepower far beyond the current era, still only shattered and collapsed, without large-scale explosion and collapse.

This reliable performance has even surpassed the genuine city walls made of pure stones and glutinous rice paste.

After a day of experiments yesterday, Zhang Yan can now be sure that unless more than fifty artillery positions fired at the same time, or two or three shells happened to hit the same place in the cement and concrete fortification, otherwise, according to this The strength of the fortifications is almost difficult to be captured by siege weapons.

But looking at the whole of China, and even the whole world, these five cannons can be said to be scorpion baba, "the only one".

Relying on a more primitive thunderbolt car to completely blast away the two-meter-thick concrete city wall is not less difficult than using artillery.

After all, everyone knows that aiming at something like artillery is very metaphysical due to the poor control of the charge, but at the very least, it is already a weapon that can be aimed.

Compared with firearms such as cannons, primitive throwing weapons such as thunderbolt cars are the real metaphysics. It is completely resigned to fate whether you can hit the target with your eyes.

Attacks at a distance of about 200 meters like yesterday were still a minority.In the actual combat process, [-] meters is a very dangerous distance, and it is very likely that the opponent's army will rush directly to the equipment after an attack.

In actual combat, thunderbolt vehicles often bombard cities from 300 meters away. At that distance, it is not just a little bit difficult to hit the wall directly at a glance like yesterday.

All in all, the results like today are already beyond Zhang Yan's expectations.He originally thought that although cement was good, unspecialized cement could only be used to build civilian facilities, and its strength was not strong enough to withstand the attack of siege weapons.

But I don't want that during this experiment, these fortifications were not even completely damaged after being directly hit, but only part of them collapsed.

To be honest, it was much better than he imagined.

It is precisely because of the convenience and reliability of this kind of fortification that after the experiment ended yesterday, he discussed with Lu Su and others overnight, and directly designated the formed cement powder as one of the marching supplies.

From today onwards, when these soldiers are marching, the supply team will specially coordinate a part of the transport capacity to carry cement powder according to the team's strategic goals, and hand it over to the combat troops as strategic materials before the battle hand.

With the help of this kind of thing, in the future, no matter whether the Lujiang army is fighting defensive battles or ambushes based on mountains and rivers, they will be able to slightly change the terrain of the battlefield and quickly build fortifications to obtain more fortifications for themselves in the course of combat. Greater advantage comes out.

Of course, cement is not a panacea.

No matter how convenient this kind of thing is, it is actually made of practical stones, and the weight is finally here.

If you want to carry enough cement with the army to build fortifications, it is inevitable that in terms of the proportion of luggage, more practical things such as military rations will be much less.

In other words, such an army is destined to be impossible to travel long distances, unless Zhang Yan has a way to completely solve the army's supply conditions.

It is precisely because of this that when it comes to the use of cement in military strategy, Lu Su did not praise the convenience of cement buildings as much as he did, but valued the reliability of cement concrete and planned to rely on this kind of thing to build Semi-permanent or even permanent fortifications.

Even if conditions permit, it is not impossible to build a bridge that can cross the Huaihe River.

You know, although building a bridge across a river seems to be a very common thing, building a bridge also depends on the environment and the actual situation.

It is naturally easy to build an arch bridge like the small river with flowing water in front of the door, but it is very difficult to have a stable ferry for transportation, let alone bridge construction, for the main water veins of the level of four sloppy streams. easy thing now.

In the future, even in the era when feudalism in China is flourishing, people will be helpless in the face of such natural dangers.

For example, if Cao Cao wanted to go down the Yangtze River from the north to attack Wu and Shu, the only way was to go south by boat and fight water battles in the Yangtze River and the large lakes along the Yangtze River.

Along with this, there are naturally a series of variables that affect the direction of the war, such as the adaptation of soldiers to water warfare and the personal abilities of naval commanders.

Under such circumstances, if Zhang Yan can build a bridge connecting the north and the south on the Yangtze River... not to mention the Yangtze River, even if he can build a bridge connecting the north and the south on the Huaihe River, it will be like a change of the world for the combat strategy of the North-South War in the Huaxia region .

Chapter 52 Change

This is no small matter.

Don't think that building bridges and roads is just a matter of people's livelihood.Under the same mobilization of troops, roads and bridges have a great impact on supplies, and the impact on the outcome of the war is even more decisive.

The reason why the Huaxia region has never built a bridge on the Sidu before is not because the Chinese people do not want to build it, but because any one of the Sidu, the river surface width can reach more than ten meters or even tens of meters.

Building bridges on such rivers is simply not something that the craftsmanship of the classical period can do.

Even if some temporary bridges were built on top of the river when the river dried up, when the river rose in the rainy season, it would be difficult for ancient Chinese adhesives to maintain their proper stickiness under the immersion of the water.

Therefore, as long as the river water is a little fierce, the bridge built will be easily washed away.

But now that he has obtained a brand-new building material, and this building material happens to be extremely waterproof, Lu Su's impulse to build a bridge on the Huai River is naturally far greater than before.

After all, he also learned a lot of news from Zhang Yan.

For example, Xuzhou, which seems to be peaceful and stable, but is actually full of crises, and Qingzhou, which has been occupied by the Yellow Turbans for a long time, are the main objects of his attention during this period.

"Hey, my lord..."

"I know we don't have enough manpower in Lujiang, but if this bridge is really built, it will be a great achievement for the present and benefit for the future!"

"I'm not going to exaggerate. Let's start from our place in Huainan and build a suitable bridge across the Huaihe River. When the time comes..."

……

"Once what?"

Zhang Yan raised his head and glanced at Lu Su with great interest. This man had been muttering in front of him for almost two hours today, saying that he wanted to build a bridge in Huainan.

After I refused with the reason of lack of manpower and too much difficulty, this person actually played a rogue with himself, as if he would not give up until he reached his goal.

……

"Once, once you have the need to send troops to the north of our Lujiang River in the future, you can use Huainan as a starting point to go straight to the hinterland of Xuzhou, and you don't have to be affected by the flood season of the Huaihe River, and you can use ships to transport troops bit by bit. "

"Ahem, I'm not talking nonsense, you told me that when you were in Huainan..."

Somewhat shy, but as if showing off, he said something to Zhang Yan. Lu Su raised his head and blinked, his face full of excitement.

"With an army of [-] starting from Huainan, Xuzhou can arrive almost overnight. My lord, you must understand the reason why troops are so expensive."

……

Just like that, when Lu Su opened his mouth, Wei Xian almost broke his leg.

When Zhang Yan was finally persuaded by Lu Su, Wei Xian's work this year included the construction of the Lujiang sewer water conservancy system and the construction of post roads from Wancheng to various parts of the Lujiang River. He also had the task of building a bridge. body.

Fortunately, the current Wei Xian is different from before. Now he has sufficient manpower and suitable materials and tools under his command. These things have given Wei Xian sufficient confidence and made him feel The amount of work is huge, but the work does not seem to be completely impossible.

And this kind of confidence and drive has also infected the actual workers below from him layer by layer, making the efficiency of the entire Lujiang River even higher.

Today, the entire Lujiang River sewer project has officially started. The first project to be carried out is the Shennong Canal Water Conservancy System designed after the Mars Field System.

The design drawings for this part of the spectacle were provided by Zhang Yan, and Wei Xian specifically consulted Kuai Qi, the Prime Minister of the Kingdom of Wan, who has a lot of research on Feng Shui, and systematically optimized the layout of the entire spectacle under his suggestion.

In addition, now there are building materials that can be easily shaped, extremely strong, and even waterproof. It can be said that even though the engineering volume of this spectacle has far exceeded the sum of all the previous works of Wei Xian, in terms of difficulty, when it is built After the work of Miracle was split up and solved, the pressure on him was nothing to care about.

The great thing is to find someone to dig the soil and dig a hole, and then build a canal with bricks and cement in the hole. This is too simple for him, even those old farmers who are farming can more or less come up and make gestures.

In fact, the progress of the work is like this. Lujiang River, or the reason why Huaxia has not had such a large-scale water conservancy project, is that the climate in the northern Great Plains is relatively stable, so there has been no such demand to feed back to the central level of the Huaxia regime. .

On the other hand, it is also because the difficulty of large-scale water conservancy projects is mainly reflected in the design and scheduling.

In this era, it is impossible for those low-level farmers to have such knowledge, and the gentry who have such knowledge or ability often do not do such thankless things.