Chapter 3002 The emperor of the Tang Dynasty did not want to accept my Koguryo surrender at all
Goguryeo mobilized nearly 100,000 soldiers and nearly 300,000 civilians, working day and night to build the fortresses located on the east bank of the Yalu River.
In the view of this Goguryeo envoy who had experienced the Tang Dynasty's attack on Liaodong City, it was simply a helpless struggle in despair.
Here, in this open area next to the emperor's camp of the Tang Dynasty, there are more than a hundred cannons that look like ferocious beasts.
Sixty of them look very sturdy and stocky, and the chassis also appears to be low. These were originally cast from the cannons of the Tang Dynasty navy warships.
It was also the first artillery used in the conquest of Liaodong. It was heavy and had to be carried on a carriage to move quickly.
There are also ten artillery pieces, the barrels of which are so thick that it makes one’s eyelids pop. They are pointing diagonally towards the sky.
Those ten are the flying thunder cannons that the Tang Empire relies most heavily on to conquer Goguryeo.
However, today's flying thunder cannons are no longer using the nitrating explosives developed by Cheng Sanlang.
Cheng Sanlang took some of that thing with him, but he had used it all long ago, and the rest was buried underground in Chengjiazhuang, Luoyang.
That was a good treasure that Cheng Sanlang had worked hard on himself. How could it be lost all at once?
Facing Cheng Sanlang with his hands spread out, Li Shimin could only pinch his nose and let the flying thunder cannon use the black artillery shells.
Although it is not as powerful as nitrate explosive shells, it is far more powerful than other artillery and is quite exciting.
What's more, now there are not one, not two, but ten flying artillery shells. Think about the power of hundreds of kilograms of black powder that can be projected into the enemy's camp or city at once.
The remaining seventy or eighty guns next to it look much slender, and the gun mount under the gun body and the two large wheels appear more agile.
These are the artillery produced by Dengzhou Firearms Workshop according to Cheng Sanlang's design and specially used in land warfare.
The large wheels of these land artillery were not much different from the wheels of carriages commonly used in the Tang Dynasty, except that all decorations were removed.
As a result, together with the gun mount, gun body and traction wheels, the weight of the entire artillery reached 2,300 kilograms.
As for towed artillery, two horses pull a cart, which is also loaded with ammunition and propellant required for the artillery.
In this way, the maneuverability of Datang's artillery was greatly improved in an instant. It could fully meet Cheng Sanlang's requirement of running away with one shot.
It is far shorter than those that can only be moved on horse-drawn carriages. The naval artillery transported by horse-drawn carriages is much stronger.
But the problem is that the navy's artillery caliber is awesome, and its power is far greater than that of these land battle guns.
These land combat artillery have only two calibers, one is a three-inch gun and the other is a four-inch gun.
The solid shells of the three-inch cannon weighed five kilograms, three liang and two qian, and four cents, while the shells of the four-inch cannon weighed ten kilograms, nine liang, and four qian and six cents.
When the Tang Dynasty forged artillery, iron models were used from the beginning. After all, with Cheng Sanlang, a great inventor, making clay models was too boring.
When the blacksmiths of the Tang Dynasty and Han Dynasty trading houses were engaged in large-scale castings in the early years, they discovered that when casting clay molds, the clay molds could only be used once and then be scrapped.
Moreover, after the clay mold is made, you have to wait for it to dry slowly, otherwise, bubbles will appear on the surface or even inside the casting.
After Cheng Sanlang heard the news, he immediately gave guidance on the work, gave up the clay model, and used the clay model to make a standard iron model.
Then use this standard iron mold as the original version, make more iron molds, and use the iron molds to cast parts.
In this way, with iron molds of the same size, the difference in the size of the cast parts will naturally be almost negligible.
The important thing is that no matter how many times you use the iron fan, as long as you are careful, it will not be damaged and it is very convenient to use.
In addition, after the graphite layer is carefully applied to the iron mold, there is no need to worry about the casting and the iron mold sticking together.
And if you use a clay mold, haha... You have to make a clay mold every time you cast a cannon, and you have to wait for the clay mold to dry completely after it is made. If it is a rainy day, you can't do anything except beat the children.
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In short, an iron fan can cast the barrels of four to five artillery pieces in one day without any delay, regardless of whether it is going to rain or his mother is getting married.
Ten iron frames can produce forty or fifty artillery barrels every day, and the caliber, weight, and size of the barrels of these artillery pieces are almost exactly the same.
It can be considered that standard parts were produced unintentionally, and Datang's artillery production also adopted the same method.
This is also the reason why the Dengzhou Navy of the Tang Dynasty was able to transform so many gunboats at a speed that surpassed that of Britain and the United States.
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"Is this the request given by the Emperor of the Tang Dynasty?"
In just over half a year, Yeon Gaesumun, whose beard and hair were already covered with silver threads, lowered his head and looked at his prostrate men.
This is his study room. This envoy Zhu Wen was secretly assigned to the Datang military camp by him.
After all, Goguryeo is now losing consecutive battles, and the land west of the Yalu River has fallen behind the Tang Dynasty.
The Yalu Water natural barrier, which had been heavily relied upon before, was unable to make waves under the indiscriminate bombardment of the Tang Dynasty gunboats.
When the Tang army established a foothold on the east bank of the Yalu River, Yuan Gaisuwen already understood that Goguryeo had no hope of victory.
Originally, we hoped that the cities west of the Yalu River would defend the city to the death and wear down the Tang's troops and morale.
Just like in the past and the Sui Dynasty, as long as it survived the winter, the Tang Dynasty would definitely become another Central Plains empire that failed to attack Goguryeo.
It's a pity that Tang Dynasty's artillery, such a terrible weapon that suddenly appeared, is simply invincible.
As soon as it begins to spit out gunpowder smoke and blazing flames, whether it is Goguryeo's armored warriors or the solid city walls, they will collapse under its bombardment again and again.
That's it. Originally, Yeon Gaesomun thought he could defend the fortresses east of the Yalu River for a year and a half.
After only persisting for more than two months, he was pushed aside by the Tang army, and was simply pushed away.
However, the warriors of Goguryeo had no fighting spirit and could not even touch the enemy. How could they fight a war?
And the scene in Baekbokou Castle also made Yeon Gaesomun feel more and more sad. The Central Plains Empire just used a new weapon, and Goguryeo lost the chance to turn defeat into victory.
"Yes, the Emperor of the Tang Dynasty has no intention of accepting the surrender of Goguryeo. Now, we, Goguryeo, have no way out."
The envoy stood up and said to Yuengai Suwen, whose eyes were dull. "Da Molizhi, let's go..."