"Thirty days? No, no! Commander, forty days I calculated according to the limit, and it is absolutely impossible to complete it in thirty days. Listening to Jiang Haoran's order, Mao Yisheng was anxious.

"Mao 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 come in, these thirty days, I also calculated according to the limit of the peripheral soldiers, "Alas! Mao Yisheng sighed heavily, rubbed his hands vigorously, fine beads of sweat appeared on his forehead, it seems that the pressure is really big, and he said again after a long while: "Otherwise, the enemy we are guarding against now is mainly Pingxiang and Liuyang, is it possible to temporarily put down the project from Xiaojianling to Dawei Mountain, mainly dedicated to Jigong Mountain, big 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!" Jiang Haoran barely thought about it, and readily agreed. Dawei Mountain's main defense is the river defense, which is also aimed at the Japanese army in the direction of Hengyang, although the devils have occupied Guangzhou, but they have not advanced to Hengyang, there should be no problems.

Sent away Mao Yisheng, Jiang Haoran and Liu Dakun came to the arsenal again, for Jiang Haoran came twice a day, Liang Changhe seemed a little surprised, and was also very nervous, as soon as the battle started, the pressure on all departments was very great, especially the arsenal, almost 24 hours a day of non-stop work, and the workers could also take a short turn to rest, but as the head of a factory, Liang Changhe had to grasp both production and technology, and if there was a problem in that link, he had to deal with it personally, he couldn't remember how many days he hadn't gone to bed, Jiang Haoran came, There will definitely be some new tasks, and it is possible to develop new weapons if they don't do it.

As soon as he entered the office, Jiang Haoran ordered Liang Changhe to find a few gasoline barrels to come over. Sitting on Liang Changhe's desk without saying a word, he picked up the pen and began to write, write, draw, and draw.

After a while, Jiang Haoran got up, handed the drawings in his hand to Liang Changhe, and said, "Do this, try how the effect is, be fast!" ”

Liang Changhe took it and looked at it, and was dumbfounded, and said for a long time: "This is not this, army commander, you don't want to use this to make a large-caliber mortar cannon, right?"

"Let's do it!" Jiang Haoran's tone was unquestionable, and Liang Changhe had no choice but to order his subordinates to hurry up.

Mortar is a large caliber, short barrel artillery, is a relatively old curved artillery, because the shape is like a stone mortar and get the name, because of the short barrel, 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, see high but not far. Therefore, although it can fire high-power artillery 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, mortars quickly fell behind, and now in addition to the equipment that is so poor that "over there" may still be used, other troops have little equipment, no wonder Liang Changhe is suspicious.

But what Jiang Haoran wanted to produce was different, but the "Flying Thunder Cannon" invented by Huaye in the Huaihai Campaign, which also had a creepy name - no conscience cannon. The principle is extremely simple, that is, use an oil drum as a gun barrel, fill a sufficient amount of propellant powder at the bottom of the oil drum, use the instant combustion of gunpowder to produce a huge impact force, and the fuse on the explosive package is ignited at the same time to send the explosive package out.

In less than an hour, a technician came to report that "that thing" was ready and had been placed in the actual venue. The technician really couldn't name the gasoline drum, so he had to call it "That thing!" ”

"Let's go, let's go!" Jiang Haoran said, ignoring everyone, shaking his hand and walking towards the real field.

The arsenal often has to test the power of weapons, and naturally the real yàn site is 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 blackened mountains and forests on all sides, there are still unfinished embers, but everyone's eyes are obviously on the 300 mm diameter oil drum in the lawn. Jiang Haoran did it so solemnly, everyone was looking forward to what power this inconspicuous thing would have.

Jiang Haoran glanced into the oil drum, a large explosive bag tied with iron wire was lying on the iron shelf at the bottom of the barrel, and an iron pipe penetrated the side of the barrel, revealing a long lead.

Jiang Haoran visually measured the distance, ordered the soldiers to use the straw man to form a formation with a diameter of 100 meters 250 meters away, and dug an inclined opening near the oil drum, and put the oil drum into it, the opening was inclined at 45 degrees, facing the straw man in the distance.

After making preparations, Jiang Haoran ordered everyone to retreat away, lazily: "Light the fire!" ”

A soldier stepped forward quickly, and in a moment, sparks appeared from the lead on the side of the oil drum, and with a loud "boom", I saw a flame pushing a black thing, quickly rising 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?" Liu Dakun exclaimed.

"It's a pity it's too close?" Liang Changhe also reacted.

Jiang Haoran coaxed everyone to tell everyone, this is nothing? This explosive 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 oil drum, it can be twice as farther.

Liang Changhe also came up with an idea, if the explosives 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, the structure of an oil drum plus 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 reinforce 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 oil drum 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.

Liang Changhe's imagination, Liu Dakun suddenly smacked his tongue, this thing can't fight a large-scale field battle, but all the way from Nanchang is hilly, and the roads and railways are all passing through the mountains. One shot goes down to a squadron, a squad dies, etc., I have to calculate how many shells a division will have to complete "hahaha"