In the artillery battle, both want to suppress the other party in order to compete for the initiative on the battlefield. The Yuan army's artillery army is also equipped with a variety of stone throwing machines, which are arranged in a staging manner to form a three-layer firepower network in a long, medium and near, and they are equipped with a rich variety of bullet types, including traditional solid stone bullets, gold juice cannons, and newly developed hollow stone flowering bullets. At the same time, mechanically powered stone throwing machines can also adopt a variety of launch methods like crossbows, which can fire large stone bullets individually and can fill small stones to shoot to form the effect of shotgun.

However, the stone caster also has inevitable defects. It is difficult to grasp the unified force by dragging the lever with human power. The lack of aiming mechanism also makes the stone caster only able to perform probabilistic shooting and difficult to ensure the hit rate. In addition, the launch rate is low, and the larger the scale caster, the slower the speed, and it is also slower to enter and withdraw the position, which is easy to be hit.

Zhao Bing spent so much money and energy to build a metal-body cannon, of course it is not good-looking. Although it also has many shortcomings, it also has incomparable advantages over the original projectile weapons. In terms of range, penetration, lethality and hit rate, maneuverability are stronger than those of the opponent. Of course, it is also inevitable that it is much higher in terms of manufacturing costs or usage costs.

At this moment, the Yuan army's large and small stone throwers were fully fired, pouring stones, explosives and oil tanks into the Song army's positions. It can be said that the attack was shaking. If we only mean the momentum, they had already won. On the other hand, the Song army seemed extremely calm at this time, and to destroy the enemy, we naturally had to save ourselves first and arranged it outside the range of the Yuan army's stone throwers. The Weiyuan artillery position seemed to be slow to fire, but it also shot with scheming.

"Target: four hundred steps away from the enemy's heavy stone thrower, the first on the south side, loading flowering bullets and gathering fire!" The Third Battalion of the Cannon was equipped with eight Weiyuan artillery. Under the command of the commander, each cannon began to load in an orderly manner.

"The gun chamber is cleaned up!" First, an artilleryman used a brush to dip water to clean the gun chamber, so as to extinguish the remaining sparks and residues left after the fire were burned after the fire was fired, and at the same time, it could also reduce the temperature of the gun body. After the cleaning was completed, he immediately reported the number.

"The medicine package is filled!" Then an artilleryman stuffed two medicine bags into the barrel chamber and pushed the medicine bag to the bottom of the barrel with a strip. After reporting, Zhao Bing changed the method of directly filling the gunpowder, and divided the gunpowder into a uniform weight package according to the caliber of the artillery. Then he could fill in different medicine bags according to the range. This not only prevented the scattering during loading, but also increased the loading speed, which was also a considerable improvement.

"The baffle is filled!" Then someone pressed a wooden baffle slightly larger than the caliber into the barrel to increase sealing and prevent the pressure generated after the explosion from leaking out.

"The projectile is loaded!" The ammunition hand wrapped the shells in a circle of linen and filled them into the barrel chamber, tamped them with a pressing rod and reported.

"Aiming is completed!" After measuring with the gun ruler, the aiming hand slightly adjusted the direction and pitch angle of the lower gun body with the help of everyone.

"One shot is ready!" After receiving the report from each gunner, the gunman immediately reported loudly.

"The second artillery is ready!"

"Three guns are ready!"...

"Fire!" After receiving reports from each artillery position, the commander waved the red flag.

"Fire!" When the gunners saw the red flag falling, they waved the flag almost at the same time.

"Fire!" The aiming hand heard the command sound and inserted the ignition hole into the ignition hole at the tail of the gun, responded with a few steps back and pulled the gun cable. This kind of firearm is actually an improved version of the ignition mechanism on the musket. Although this change can avoid accidental shootings that occurred when using a fuse directly ignites, and can also reduce the impact of wind and rainy days on combat and improve the ignition rate.

At this time, the others had retreated to a safe distance between the sides of the gun body, squatted down, covered their ears, and opened their mouths to prepare for protection. He heard a thunderous sound, and the gun body shook, and the dust on the ground bounced up, accompanied by the flames and smoke from the gun mouth, and the projectiles flew out. The gunners were not able to see if they hit it, but hurriedly reset the gun body that had been displaced due to recoil, cleaned the gun bore, and prepared for the next launch.

Seeing the cumbersome procedures for launching this set of guns, in fact, the rigorously trained gunners can complete it in just three or two minutes with each other. Overall, although they are not as good as modern breech guns, they are much faster than stone throwers. In order to improve the hit rate, they also adopted the fire-gathering method used when firing muskets, striving to destroy the target at one time.

"Weiyuan cannons are good in this round!" Zhao Bing, who was watching the game, saw several shells exploded around the enemy stone thrower from the telescope, with at least three of them hitting directly, which was enough to meet the excellent standard. Then the tall stone thrower slowly fell to the ground under the double destruction of the explosion air wave and impact force. The gunners who were operating the artillery also suffered heavy casualties in the explosion, and it was almost impossible for them to participate in the battle. Seeing this, he praised loudly.

In fact, stone throwing machines have existed in ancient times, and are not unprecedented advanced weapons. With the word "giant", it simply means that this stone throwing machine is powerful and can throw larger stone bombs, but there is no breakthrough innovation in key technologies. The larger the stone roll, the greater the deterrent force on the enemy, but the greater the stone rolling machine, the higher the requirements for launching devices, so that this giant stone throwing machine may be more bulky, less convenient to carry, and has a lower launch frequency.

Therefore, Zhao Bing knew that the stone thrower would inevitably have technical bottlenecks to a certain extent and would lose its advantages. Thinking about how to move huge devices to a suitable position in the absence of modern lifting machinery, where to find these giant stone bullets, how to transport these giant stone bullets, and how to install giant stone bullets onto the machine will consume too much manpower. Each shell requires many soldiers to work hard to transport, which will inevitably reduce the efficiency of using this weapon. Then, once this weapon is destroyed, it cannot be completed in a short time to repair it.

Of course, the power of the heavy stone thrower is amazing and has a long range. It not only threatens the safety of the frontier soldiers, but also destroys the artillery arranged at the frontier, and will seriously damage the morale of the enemy. At this moment, the heavy stone thrower of the Yuan army was very embarrassed. They tried their best to counterattack, but they were unable to reach the rate of fire and range. They wanted to evacuate the position and had to retreat. They could only watch as if they were used as a target and turned into piles of waste fire under the volley of the Song army.

"Your Majesty, the enemy can't hold back!" Chen Dun pointed to the battlefield and said.

"They are smart." Zhao Bing shook the smoke and dust on his body and picked up the telescope and looked at it.

"How can I tell? They are not afraid of being blown to pieces!" Chen Dun said indifferently.

"Look, the enemy's heavy catapults suppressed the artillery positions on our positions and attracted long-range artillery fire. Once the heavy catapults are completely lost, they can free up their hands to deal with them..." Zhao Bing said while observing. At this time, the Yuan army had begun to attack forward, but it was not the cavalry, but the infantry.

"Oh, so that's it!" Before Zhao Bing finished speaking, Chen Dun interrupted, "At this time, their stone throwing machine suppressed the defenders on the front line of our basement, and the rapid-fire cannon also withdrew from the position in order to avoid the cannon, forming a fire blank area before the basement. It is the best time to attack."

"Haha, it's quite smart!" Zhao Bing said, but his eyes did not leave the battlefield. At this moment, the Yuan army's large and small stone throwers opened fire with all their might. The abandoned oil tank ignited a raging fire in front of the position, and the stone bombs smashed down like hail, and the weak place on the building had already shown signs of collapse. Obviously, his opponent was also an experienced general in the battle. He dared to abandon those precious stone throwers to win opportunities for the attack. If he were to do so, he would definitely seize this short opportunity to launch an attack.

"Crazy, crazy, so close, they haven't stopped shelling!" Chen Dun looked at the Yuan army approaching the building, but their stone throwing machine still did not stop, and the attacking soldiers were willing to risk being injured by accident and still shouted.

"There is nothing strange. It is no accident that the Yuan army can dominate the world!" Zhao Bing clenched his fists and said, but he did not realize that his palms were full of sweat.

"Let's attack quickly, if the enemy is late, you will rush to build a base!" Chen Dun, the person who watched the battle, was even more nervous than the one who fought, and shouted with a stomping foot.

"Calm down, how can you be so anxious?" Zhao Bing glanced at Chen Dun, who was scalded with his butt.

"I'm worried for them..." Chen Dun said anxiously, bluntly, but his voice was overwhelmed by a series of commands.

"Six hundred steps in front of the formation, volley!" The rocket launcher arranged at the last side of the position was also ready for launch at this moment. With the command of the officer, the launcher raised the elevation angle to cover and shoot at the small and medium-sized rock-throwing machine arranged in front of the enemy.

‘Swoosh, swoosh, swoosh…’ If the power is still so high, the rockets dragged their tail flames into the air, and the smoke of gunpowder instantly enveloped the entire launching position, which was much more spectacular than the cannon launch. The rockets rose to a high altitude and turned downward, plunging into the enemy formation. The explosion sounded, and flying shrapnel shot out everywhere. The shock waves rose up again after hitting the mountain wall, rising like a monster.

Zhao Bing is still helpless about the rocket's hit rate. He has improved the tail nozzle one after another, plus three tail wings, and two abdominal wings, but it has not improved fundamentally. Therefore, he no longer expects the rocket to conduct precise strikes like missiles, and still uses it as a long-range support weapon, instead increasing the charge and increasing its power, in order to expand its coverage and increase its lethality through this.

‘Cough cough…’ Although Zhao Bing was far away from the battlefield, he was still choked by the smoke coming from the smoke. Because the smoke in the valley had been dispersed for a while, Zhao Bing dug out his itchy ears, picked up his telescope and looked forward. But he saw that there was a mess in front of the enemy formation. What was even more amazing was that a large fire ignited and spread around the stream. Needless to ask, it was caused by the leakage of the explosive oil tank. It not only did not extinguish the water, but it burned more and more vigorously.

"What a waste!" Zhao Bing said with great distress when he looked at Huo Liu.

Zhao Bing knew that the preciousness of this tincture oil was much more difficult in this era than in modern times. A few years ago, he also wanted to try the production of the legendary naval warfare weapon of the Byzantine Empire, "Greek Fire", but at first the biggest problem was not the formula but oil. Without this basic raw material, it would be useless. He also knew that China's waters had rich oil reserves, but just thinking about it, he did not dare to make extravagant wishes. However, the Song army had a long history of using tincture oil, but it was from the Ziliujing in northern Shaanxi, and he was still unavailable.

Later, Zhao Bing got some through the merchants of Otuo. Even the price of friendship was so expensive that he was shocked. It is said that this business has always been controlled by the Alao Wading family in charge of the "Marshal of Hui Hui Gunners" and others could not get in. It was not until he learned that the turtle oil from the Southern Song Dynasty came from Chameng to pay tribute that he found a large number of channels to obtain turtle oil. Of course, this large amount was also relative.

With the raw materials, Zhao Bing devoted himself to the research work, but he had no clue. This is because the "Greek Fire" is related to the national destiny. The Byzantines not only kept the recipe of Greek Fire extremely secret, but also rarely used it in wars in order to prevent the enemy from peeping into relevant secrets. They would rather sacrifice soldiers than show them weapons until they were urgent. Therefore, some scholars believe that this confidentiality work is done so well that even the Byzantines themselves no longer learned about the accurate recipe of Greek Fire for centuries.

Later generations also tried to restore based on legends and historical records, but no one could achieve the power of the legend. However, Zhao Bing still guided the craftsmen to conduct trial production based on his own knowledge and current materials. After two years, he failed to achieve the legendary effect of burning when touching water, but it could also achieve the effect of burning on the water surface and not being stained. As for the launch method, he designed a device, but it was still in a confidential state and was put into actual combat as a secret weapon.

The rocket bombardment instantly suppressed the enemy's rock-dumping machine. At this time, the Song soldiers hidden in the trenches also quickly went to the city, but the Yuan army soldiers had already destroyed the obstacles in front of the city, and some people had crossed the trenches and set up ladders to prepare to go to the city. If ordinary city defenses faced enemy soldiers entering the shooting dead corners, they could only throw wooden rocks or dump hot oil to drive the enemy out, but they would often be injured by enemy archers. However, there were no shooting dead corners in the star-shaped city walls, and they could rely on mutual fire support to eliminate the enemy.
Chapter completed!