"What did you say, my lord?" Bing Zhi seemed to can't believe his ears, Zhang Nan, who was still encouraging him to continue this research just now, how could he turn his face and say that he couldn't succeed? So what's the point of him doing this research?

Zhang Nan saw the confusion on Bingzhi's face, and then explained: "I'm not saying that your idea is bad, your idea of using gunpowder to make new weapons is good, but it is impossible to make a thunderbolt that can be used repeatedly." ”

"Why can't it be?" The soldiers were puzzled.

"Gunpowder is a disposable, you run out, even if you want to use a container to achieve the effect of secondary use, then you have to reload gunpowder, but a weapon as powerful as thunder, if you want to use it twice, you will inevitably use a lot of gunpowder, and the original intention of this thing I made at that time was to go and not return, so I didn't consider the problem of secondary use at all." Zhang Nan spread his hands and said.

"The huge power of the thunder is destined to not be used twice, if you want to use it twice, you must reduce the amount of gunpowder, and if the amount of gunpowder is reduced, the power will be reduced, so it is impossible for your idea to be realized." Zhang Nan said.

Zhang Nan didn't want to discourage this young man's enthusiasm, but it was simply impossible to make a grenade for secondary use.

"Then why do you say it can be realized?" Bingzhi continued to ask.

"What I mean by realization is to build a new weapon that can be used twice based on your steel pipe and gunpowder, but it's not a thunderbolt, you know?" Zhang Nan asked.

When he heard this, he nodded.

"Qingquan, are you saying that this thing can really make new weapons?" Mo Zu looked at the neatly arranged steel pipes of different sizes on his desk and frowned and asked, obviously, Mo Zu didn't believe that this thing could do anything.

Although Mo Zu is not good at making weapons, he knows that things like thunder can become sharp weapons for killing, relying on the power of gunpowder, and it has nothing to do with their group of craftsmen.

So when Zhang Nan said that he could create a weapon that relied on gunpowder to cause damage and could be used again, Mozu was a little unconvinced.

"Of course you can, but before that, I want to ask Bingzhi, do you know what the thunder relies on to kill people." Zhang Nan turned his face and said to Bing Zhi who was standing beside him.

"Of course it's gunpowder." Soldiers to the road.

"Yes, that's right, it's gunpowder, but if you look at this thing you made, since you want to rely on gunpowder to kill people, and you hold all the gunpowder in the steel pipe, how can you kill the enemy? The amount of gunpowder is filled up, and the steel pipe will explode, but after the steel pipe explodes, you will die, and the amount of gunpowder is small, what enemy do you kill? Zhang Nan said.

"That's right! What Master Zhang said is very true, this is the problem I am encountering now, Xiao Liuzi blew up his hands because of this incident. Bing Zhi was also a little excited when he saw Zhang Nan point out the problem with a sharp point.

Since Zhang Nan can see the problem, there must be a solution in his heart.

"Little Liuzi?" Zhang Nan asked.

"Xiao Liuzi is this guy's deputy, and he was originally a very talented craftsman, but he followed this kid with a hammer and a stick in the west for a day, and now the handle is blown up, hey, it's a pity." Mo Zu shook his head and said with a look of regret.

Hearing Mo Zu talk about Xiao Liuzi again, Bing Zhi's expression also dimmed, and it could be seen that Bing Zhi still felt very indebted to Xiao Liuzi.

"Hey, the matter has come to this point, and there is no way to do it, Mozu might as well report this matter to the emperor, and let the emperor give Xiao Liuzi some honor, otherwise it would be a pity for a good craftsman to fold like this." Zhang Nan said.

In fact, Zhang Nan still respects these craftsmen who have dedicated themselves to Datang's scientific and technological undertakings in his heart, regardless of their craftsman status, they can be regarded as a combination of scientists and engineers.

Scientists are responsible for proposing theories, and engineers are responsible for turning these theories into reality, and this group of craftsmen in the Tiangong Department is a combination of scientists and engineers.

"Good way, tomorrow the old man will write a letter, I hope the emperor can agree!" Mo Zu slapped his palms excitedly, obviously he hadn't thought of this method before.

"Okay, let's get back to this thing, have you thought about this issue differently?" Zhang Nan asked.

"A different way of thinking? What to think differently? "The soldiers are puzzled.

"In other words, you only saw that the thunder used gunpowder to kill the enemy, but if you can make gunpowder into a pedal and then use something else that can be mass-produced to kill the enemy, won't your purpose of secondary use be achieved?" Zhang Nan said with a smile.

In fact, Zhang Nan believes that the current Ministry of Heavenly Engineering is fully capable of making thermal weapons, after all, even coal-burning steam engines can be built, and there is no reason why even the most primitive assault guns cannot be built.

China's assault rifle can be said to be the originator of tubular jet weapons.

And the craft is not complicated, it has appeared in the Song Dynasty. The front section of the assault gun was a thick bamboo tube; The part that swells in the middle is the powder chamber with a little fire hole in the outer wall; The back section is a hand-held wooden stick.

According to the "History of the Song Dynasty and the Chronicles of the Soldiers": in the first year of Kaiqing, "the musket was made again, with the giant bamboo as the tube, and the inner security of the Zi Yao, such as burning and releasing the flames, and then the Zi Yi made a sound like a cannon, and heard more than 150 steps from afar

The assault rifle uses "giant bamboo as the barrel", which increases the power and range, and adds the "sub-kiln". This "sub-kiln" is the most primitive bullet, which can be sent out when the gunpowder erupts and hits the target

And the "Ziyi" inside is the most primitive bullet, of course, in the Song Dynasty, it was replaced by tiles and stones.

When Zhang Nan first knew about this assault gun, he deeply admired the wisdom of the ancients, which was simply the most primitive troll. And it's not small.

It is such the most primitive assault rifle, its firing range has reached 300 meters, and the effective firing range is also about 100 meters, which can be said to be a great weapon, but subject to the restrictions of the times, such a firearm is not worth mentioning at all in the eyes of cavalry with extremely high mobility performance.

And the immaturity of the process is also a big problem, after all, the damage of a single thermal weapon is still too small for the cavalry, unless it achieves complete fire suppression, otherwise in front of the cavalry, the original thermal weapon can hit a five-five at most.

At least until the invention of the machine gun, the cavalry's position on the battlefield was unshakable.

"Can you still do that? It's just that I really can't figure out how to use gunpowder as a pedal, and I hope that Lord Zhang will make it clear. In Bingzhi's eyes, Zhang Nan's talent for these skills is unmatched by anyone in their Tiangong Department.