In theory, the outer diameter and inner diameter of a cannon cast from the same iron mold are the same!
Then the matching projectiles can also be unified!
Another word: universal!
In that era, this was a very terrifying thing!
"Your Majesty, the method of using iron as a mold to cast cannons is theoretically feasible. However, the iron mold and the molten iron need to be separated by special materials. I have tried it before, but I don't know if it will work for cannon casting."
"If it works, I will inform Minister Fan immediately."
Chongzhen nodded: "Don't be anxious, take your time! I have plenty of time to wait. If you need money, ask Minister Fan for it. He will let you come to the palace to ask me for it!"
Li Dalun knelt down in a hurry to express his gratitude, then stared at Fan Jingwen without saying a word.
Fan Jingwen sighed: "Don't worry, I'll give you money if you want it, and I'll give you people if you want them!"
After hearing this, Li Dalun danced with joy and returned to the crowd under everyone's gaze.
The others were extremely envious when they saw this, and some even immediately knelt down and expressed their ideas to Chongzhen.
It was not until the evening that everyone reluctantly left the Huangji Palace.
Chongzhen was pleased and calculated that he had spent more than 100,000 taels of research and development funds in one afternoon.
But he didn't feel sorry at all.
If all those people's ideas are successfully developed, not to mention 100,000, even 100,000 or 1 million people will support it.
Before falling asleep, Chongzhen seemed a little absent-minded as he held Concubine Yuan in his arms.
Although the beauty in front of him was beautiful, his mind was all in the northwest.
If nothing unexpected happens, Yan Yingyuan will recapture Xuanfu Town early tomorrow morning!
The situation there is different from that in Yanqing.
Xuanfu has been an important border town since the founding of the Ming Dynasty. During the Jiajing period, there were 120,000 military households, 4,000 official households, and only 2,000 civilian households in Xuanfu Town. It was a veritable "military city"!
So many years have passed, and although there have been additions and subtractions, it is still a military city!
Yan Yingyuan only has 5,000 soldiers and horses. Can he do it?
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