"Thirty days, no, no, commander, forty days I calculate according to the limit, and thirty days is absolutely impossible to complete." Hearing Qin Feng's order, the engineer was anxious.

"Li Gong, there is no way, it is estimated that this fortress does not need to be repaired in forty days, the Japanese army has already entered the army, and in these thirty days, I also calculated according to the limit of the peripheral soldiers.

"Alas," the engineer sighed, rubbed his hands vigorously, fine beads of sweat appeared on his forehead, it seemed that the pressure was really great, and he said again after a long while: "Otherwise, the enemy we are guarding against now is mainly the first line of Jinhua and Quzhou, is it possible to temporarily put down the project from Xiaojianling to Dawei Mountain, mainly dedicated to Jigong Mountain, large and small Jianling, if all the construction starts, not to mention the manpower, the raw materials may not be able to keep up, so maybe it can be completed in thirty days." ”

"Okay, just do what you want." Qin Feng almost didn't think about it, and readily agreed, Dawei Mountain's main defense is the river defense, and it is also aimed at the Japanese army in the direction of Hengyang, although the devil has occupied Guangzhou, but he has not advanced to Hengyang, there should be no problem.

Sent away the engineer, Qin Feng and Zhang Sandong came to the arsenal again, for Qin Feng to come twice a day, Xia Guangjin seemed a little surprised, very nervous, as soon as the battle started, the pressure on all departments was very great, especially the arsenal, almost 24 hours a day non-stop work, workers can also take a short turn to rest, but as the head of the first factory, Xia Guangjin has to grasp both production and technology, and if there is a problem in that link, he must deal with it personally, he can't remember how many days he hasn't been to bed, Qin Feng will definitely have some new tasks when he comes, It's possible to develop new weapons again, can Xia Guangjin not be nervous.

As soon as he entered the office, he sat on Xia Guangjin's desk without saying a word, picked up the pen and began to write and draw.

After a while, Qin Feng got up, handed the drawing in his hand to Xia Guangjin, and said, "Do this, try how the effect is, be fast." ”

Xia Guangjin took it and looked at it, he was dumbfounded, and said for a long time: "This is not, military commander, you don't still want to use the conscienceless cannon."

"Let's do it." Qin Feng's tone was unquestionable, and Xia Guangjin had no choice but to order his subordinates to hurry up.

No conscience cannon is a large caliber, short barrel artillery, is a relatively old curved artillery, because the shape is like a stone mortar and named, because the body barrel is short, so its trajectory has the characteristics of a mortar, but not exactly the same as mortars, its trajectory is more extreme than mortars, that is, high but not far, so, although it can fire high-power shells, but the range is extremely unsatisfactory, because the flexibility of firepower is really poor to a certain level, so after the appearance of mortars and howitzers, no conscience guns quickly fell behind, until now in addition to the equipment is poor"Over there" may still be used, and other troops are rarely equipped, no wonder Xia Guangjin is suspicious.

But what Qin Feng wanted to produce was different, but the "Flying Thunder Cannon" invented by Huaye in the Huaihai Campaign, which also had a creepy name,

The principle of the unconscionable cannon is extremely simple, that is, an iron barrel is used as a barrel, and a sufficient amount of propellant powder is loaded at the bottom of the iron barrel, and the explosives are burned instantly to produce a huge impact, and the fuse on the explosive bag is ignited at the same time to send the explosive bag out.

In less than an hour, a technician came to report that "that thing" was done and had been placed in the experimental field, and the technicians really couldn't give this cannon a cannon, so they had to call it "that thing." ”

"Let's go, let's see." Qin Feng said, ignoring everyone, shaking his hand and walking towards the experimental field.

Arsenals often test the power of weapons, and naturally experimental sites are indispensable.

Out of the thick iron gate of the base, a wide lawn fell into front of you, tattered armored vehicles, cars, and some straw men, Japanese army portraits of human head targets scattered around, the lawn is full of huge craters, in the mountains and forests that are burned black on all sides, there are still unfinished embers, but everyone's eyes are obviously on the 300 mm diameter iron bucket in the lawn, Qin Feng is so serious, everyone is looking forward to what power this inconspicuous thing will have.

Qin Feng glanced into the iron bucket, a large explosive bag tied with iron wire was lying on the iron shelf at the bottom of the barrel, and an iron pipe pierced out of the side of the barrel, revealing a long lead.

Qin Feng visually measured the distance, and ordered the soldiers to use the straw man to form a formation with a diameter of 100 meters two hundred and fifty meters away, and then dug an inclined hole near the iron bucket, and put the iron bucket inside, the opening was inclined at forty-five degrees, facing the straw man in the distance. After making preparations, Qin Feng ordered everyone to retreat away, lazily: "Light the fire." ”

A soldier stepped forward quickly, and in a moment, sparks erupted from the lead on the side of the iron bucket, and with a loud "boom", I saw a flame pushing a black thing into the air.

"Boom", a loud bang exploded in the sky above the straw man, and a group of people covered their ears and watched a huge mushroom cloud rise into the air, completely dumbfounded.

I saw that the hundreds of straw men who were still on the ground were blown away by the wind, not to mention the straw, not even a single wooden stick for the straw men, and the ground was turned over a layer.

The people who were still disdainful just now were suddenly shocked, and their open mouths could be stuffed into an ostrich egg without exception.

"Rub, if this is an infantry that fights little devils, how many people will die in one shot." Zhang Sandong exclaimed.

"It's a pity it's too close." Xia Guangjin also reacted. Qin Feng coaxed everyone to tell everyone, this is nothing, this explosives package is still too simple, if you increase the amount of gunpowder, and then add thistle, pepper, and chili powder to it, the power will be greater, as for the distance, as long as you add gunpowder to the bottom of the iron barrel, it can be twice as farther.

Xia Guangjin also came up with an idea, if the explosive package is changed to the shape of the warhead, reduce the resistance, the distance may be farther, the type of ammunition can also be subdivided according to the needs of the battlefield, as long as the ammunition is sufficient, it is not a problem to use it to attack the fortification, an iron bucket plus the structure of the bottom is only twenty or thirty kilograms, if you use a bucket truck to push it, you don't even need to dig a hole, simply strengthen the bucket truck, weld several movable steel pipes on the bucket truck, you can put it away in peacetime, put it down in wartime, and lie on the ground like an eight-legged fish, Then weld a bracket in front of the iron barrel as a gun mount, put it down to open the gun, and it is possible to adjust the firing angle at any time, which is light and flexible, and cheap and applicable. Xia Guangjin imagined this, Zhang Sandong suddenly smacked his tongue, this thing is not good for large-scale field battles, but all the way from southern Zhejiang is hilly areas, roads and railways are passed through the mountains, if you lie on any hill and fire a few shots at the little devils on the road down the mountain, my obedient, a squadron will be killed by a squadron, a squad will die, and so on, I have to calculate how many shells a division will take.

"Hahaha"