Yecheng R&D base.

Pu Yuan, along with Chen Yuan and Master Lu, was talking about the improvement of cast iron artillery.

Especially Pu Yuan, after seeing the performance test data of the cast iron artillery, suddenly felt that his constantly improved grenades and firecrackers were no longer so important.

The power of cast-iron artillery is complete with grenades and firecrackers!

Moreover, the difficulty of processing grenades and firecrackers is now more complicated than that of cast-iron artillery, otherwise Pu Yuan would not have studied it for so many years, and it would not be possible to carry out mass production of grenades and firecrackers.

"Master Chen, what you said about firing gunpowder, I think you can use the gunpowder of the gunpowder to conduct an experiment."

Pu Yuan took out the gunpowder that he had improved for firing the gun and showed it to Chen Yuan and Master Lu.

Chen Yuan was very happy and said to Pu Yuan: "Master Pu, this is great! ”

The high-quality iron ore mentioned by Master Lu before, Cao Cao also sent people to transport it to the Yecheng research and development base.

Soon the trio was ready for the work of making cast-iron artillery.

Because Chen Yuan and Master Lu had already cast two cast iron cannons before, and the craftsmen of the R&D center under them were also familiar with the casting process, it only took two days for the third cast iron cannon to be successfully cast.

Pu Yuan has also been watching the casting of cast iron cannons to see if he can find inspiration for making firecrackers in batches.

After observing the casting of the entire cast iron cannon, Pu Yuan was amazed by the ability and efficiency of the division of labor and cooperation of the craftsmen in the R&D center, and felt that this method should be applied to the Yecheng R&D base.

At present, when the Yecheng R&D base is producing firearms and grenades, the biggest problem is that there is a significant difference in the power and explosion time of each grenade.

This is especially true of firecrackers, which make ten firecrackers, and six of them can be used normally.

Of the six firecrackers that can be used normally, only two can be hit more accurately.

This extremely low yield rate also made Cao Cao not fully supportive, and Pu Yuan planned to mass-produce the firecracker.

However, cast iron artillery is different from grenades and firecrackers, and it requires more materials to be cast than the craftsmanship.

After the casting of this cast iron cannon was completed, Chen Yuan and Master Lu did not rush to pull it out to experiment with the improved power, but continued to cast the next cast iron cannon.

At the same time, the two also asked Pu Yuan to help build temporary fortifications on the open space east of the Yecheng research and development base, modeled after the city wall, to test the power of cast iron artillery.

After Chen Yuan and Master Lu completed the manufacture of the second cast iron cannon, Pu Yuan also completed the construction of the fortifications for testing the cast iron artillery.

Then the three of them invited Cao Cao and Lin Chuan to the Yecheng research and development base to watch the improved cast iron artillery power test.

After Lin Chuan and Cao Cao heard the news that the manufacture of the improved cast iron artillery had been completed, they were very excited to come to the Yecheng research and development base.

"Lord King Wei and Lord Hou of Hanzhong, the two improved cast iron cannons that have been manufactured now are preparing to be transported to the open space east of the Yecheng Research and Development Base for power and range tests!"

Chen Yuan said loudly to Cao Cao and Lin Chuan.

"Good! Hurry up, this king can't wait to see the power of the cast iron cannon with his own eyes! ”

Soon Cao Cao and Lin Chuan and his party came to the open space east of the Yecheng research base, where the city wall fortifications had been built to test the power of cast iron artillery.

After Cao Cao and Lin Chuan saw the fortifications built by the imitation of the city wall again, they were very satisfied with the arrangements made by Chen Yuan, Master Lu and Pu Yuan.

Next, Chen Yuan and Master Lu came to a cast iron cannon, and the craftsmen of the R&D center began to load gunpowder and iron solid projectiles with their hands and feet.

After the two cast-iron cannons were ready to be fired, Chen Yuan and Master Lu motioned to everyone present to cover their ears, and then lit the cannon fuse at the same time.

"Boom!"

"Boom!"

When the two cast-iron guns fired, a huge roar sounded one after the other.

Cao Cao and Pu Yuan, who saw the cast-iron artillery firing for the first time, were as shocked as seeing a grenade explode for the first time.

"Mr. Lin, the momentum of this cast iron cannon when it was fired was so huge!"

Cao Cao, who was shocked by the sound of the cannon, said loudly to Lin Chuan.

"Lord Wei, after these two cast-iron cannons are calibrated, you will be able to see their power!"

Lin Chuan also replied loudly at Cao Cao.

Only then did Cao Cao know that the original two cast-iron guns were now being calibrated.

After Chen Yuan and Master Lu opened fire, they waited until the smoke and dust completely cleared, and the craftsmen of the R&D center who were waiting on the side began to skillfully clean and cool the barrel, and then put in the solid iron projectile of gunpowder again.

After the two cast-iron guns were fired twice, Master Lu and Chen Yuan basically determined the landing points of their respective cast-iron guns.

Then the two of them carefully inspected the inside of the barrel of the gun, and after confirming that no small cracks were found, they began to surprise reload the ammunition.

After this reloading, the two men aimed the two cast-iron guns at a distance of 500 meters according to the measured impact points, and built the fortifications of the city wall to test the power of the cast-iron cannons in advance.

"Lord Wei, would you like to test the power of the cast iron cannon with your own hands?"

Under the guidance of Lin Chuan's eyes, Chen Yuan tacitly took the torch to Cao Cao and asked Cao Cao respectfully.

"Hahaha, good! That's what this king wants! ”

After Cao Cao heard Chen Yuan's inquiry, he took the torch from Chen Yuan's hand quite excitedly, and then laughed loudly.

Then Cao Cao came to the back of a cast iron cannon, and Cao Cao, who had already seen how Chen Yuan and Master Lu fired the cast iron cannon, directly aimed the torch at the artillery fuse.

"Boom!"

The cast-iron cannon roared again, and before the smoke cleared, Cao Cao prepared to see for himself how powerful the cannon was.

Lin Chuan and the others followed behind Cao Cao, and soon came to the city wall fortifications used for testing.

I saw a solid iron projectile lying quietly on the ground, and a shallow pit the size of a human head appeared on the fortifications of the city wall, and obvious cracks could be seen around the shallow pit.

"The power of this cast-iron cannon is really huge!"

Cao Cao said in surprise after seeing the damage caused by the cast iron artillery to the city wall fortifications built of blue bricks.

Next, Chen Yuan and Master Lu continued to complete the test of the power of the cast iron cannon, and Pu Yuan also went up to fire a shot.

Under the continuous bombardment of two cast-iron cannons, the fortifications of the blue brick city wall soon collapsed!

The next two cast-iron cannons began to bombard another rammed-earth fortification, and the rammed-earth wall withstood more cast-iron artillery bombardment than the blue-brick wall, but the rammed-earth wall also had its limit.

Under the continuous roar of cast iron artillery, the blue brick city wall fortifications and rammed earth city wall fortifications were successively bombarded and collapsed by iron solid projectiles.

This time, after Cao Cao had seen the power of the cast iron cannon with his own eyes, he had completely believed what Lin Chuan said.

"Lord Wei, please give a name to the cast iron artillery, this will be the beginning of the invincible world of Great Wei!"

Lin Chuan said to Cao Cao.

"Okay, this cast iron cannon is indestructible, how about calling it a Shenwei cannon?"

"Hahaha, invincible, it's for Shenwei! Lord Wei, this cast iron cannon will be called a Shenwei cannon in the future! ”