The fire compartment of the new fighter still has two guns in front, and a secondary gun is added in the back, all of which are fixed on the floor, and the firing angle is adjusted in a small area through the base, and a gun is added, but there is not much change in terms of weight, so the adjustment of the fighter is not large, and it will not take long to mass production.

In addition to fighters, there are also bombers, the bombers have not changed, or according to the previous drawings of the production, this kind of bomber than the previous airship load is larger, but also on both sides of the cabin opened a lot of muzzles, equipped with artillery, in order to improve the survival of the bomber and air combat capabilities, if the formation of formation, with their more powerful and dense number of artillery, even if there is no fighter escort when encountering enemy aircraft, there will be no more embarrassing situation of no way to fight back.

After sending away the samples and drawings, Yuan Fangmei slept all day, and when he got up, he was full of energy and refreshed, and he simply ate something and devoted himself to research again, this time, his target was an anti-aircraft gun, this thing was useless before, but now it is absolutely necessary, the Wanliu Empire, the Liusang Empire, already has the ability to make airships, and has a large number of air forces, and the Wen'an Empire's airships are estimated to be coming out soon, and the importance of air defense weapons is getting higher and more urgent.

Anti-aircraft guns, Yuan Fang still uses two kinds of shells, one is a scattered shell, the other is an ordinary explosive shell, the principle is similar to that of ordinary artillery, but the elevation angle is relatively high, the base adds a secondary wheel adjustment lever that can adjust the angle and direction, of course, this base needs more parts, but also leads to heavier weight, Yuan Fang first built three guns with different barrel lengths, after the test firing to determine that the longer the barrel, the farther the range of the shell, redesigned a gun, this kind of artillery has a smaller caliber, two goose egg sizes, Yuan Fang tried, such a large shell is enough to break through the armor of the airship after exploding, as for how to control the shell to explode in the air, this is very simple, as long as the fuse in the shell is adjusted to the length of time it takes for the shell to fly to the specified height, as for the shotgun, it is even simpler, the shotgun itself has a spike barb, as long as it hits the opponent's airship, it will be embedded on it, and there is no problem with exploding a little later, as for those who do not hit, the shrapnel and shock wave after the explosion in the air will bring a lot of trouble to the airship, It also has a certain lethality.

Because it is a front-loading gun, the frequency of firing will not be too fast, and one or two anti-aircraft guns will not pose much of a threat to the air force formation, but what if it is more? Ten, twenty, fifty, or even a hundred guns were fired together, and hundreds of shells, large and small, exploded in the air together, and that powerful shock wave alone was enough to destroy the armor and main structure of the airship.

The moment he received the drawings, Yan Xiong immediately convened a meeting of all the stewards and assigned various production tasks, some were specifically responsible for the production of shells, some were responsible for the production of artillery, and the various divisions of labor were clear, and everyone performed their duties.

On the outskirts of the imperial capital, Lin Mengsheng's research base before, although Lin Mengsheng and they have moved to the Emerald Island, the security here is still tight, and it is even better than before, the army responsible for security on the periphery has been replaced by the most loyal forbidden army, as well as the air force of the female guards, these troops have received strict orders from Yang Xing, without his permission, no one is allowed to approach, even if they themselves can't, only people with special jade cards and airships can enter, and violators will be killed, that is, they will be killed on the spot.

After Ren Fei returned to the imperial capital, he first went to find Damei, and after relaying Yuan Fang's words, he was busy converging with Luo Siping to carry out an internal investigation, and Damei dropped several large transport planes on the same day, loaded with various materials for making gunpowder, and went to the secret base on the outskirts of the imperial capital.

All kinds of materials transported in the past are packed in thick bags, and the outside is sealed with boxes, even the porters don't know what is inside, and some high-ranking stewards know a little bit about it, but they are only a small part of it, and Damei's secrecy work is quite in place.

The airship landed at the secret base, and after Da Mei showed Yang Xing the jade plate specially given to her again, the defenders sent people to unload the goods and send them to the mountain, here, there are many prisoners of war, they are the main labor force for the production of gunpowder, and the people who are responsible for guarding the prisoners of war and supervising the work, in addition to the three brothers of the Mo family, there are also some disabled soldiers and the old and weak who voluntarily come here and give up their freedom in exchange for more remuneration, these people are all selected by Yang Xing, their backgrounds are innocent, and there are difficulties in the family, While Yang Xing gives an absolute high salary to help them solve the difficulties at home, they will use the next long time in return, not to leave the base, not to contact outsiders, not to mention family holidays, the only permission is to communicate with family members, but each letter will be strictly checked to ensure that it does not involve secrets, once it is found that there is a secret leak, it will also be severely punished.

All the preparations were carried out in an orderly and secret manner, and after Yuan Fang made a suitable anti-aircraft gun, he finally became idle, and he also had time to think about revenge for Ou Qiang Xianxue, for this reason, Yuan Fang also specially took Yu Jingqiu, Huo Bingyan and Lin Menghan from the imperial capital to discuss together.

In almost a month, Huo Bingyan and Lin Menghan's injuries have recovered, and they are now resuming training, Yu Jingqiu's injuries are more serious, and they need more time to recuperate, but they can already walk around on the ground, except for the injury on their right arm, there is no major problem, instead of letting them stay in the Imperial Capital Military Hospital, it is better to come to Changhuandao to change the environment, with Yuan Fang and them by their side, the mood can be better. It was noon when Yu Jingqiu and the others came to Changhuan Island, and the artillerymen rested and went back for lunch, so they didn't know the existence of artillery, until Yuan Fang took them to the studio, and the sound of artillery on the beach startled Yu Jingqiu and them, and Yu Jingqiu knew that Yuan Fang and they had made so many powerful weapons during this time.

After changing the environment, the mood was really much better, Yu Jingqiu, Huo Bingyan and Lin Menghan followed Yuan Fang to the beach to watch the power of artillery, and Yuan Fang also made an exception and came over with a box of cannonballs to demonstrate to them.

In order to save resources, the artillery shells used for training during this period are hollow iron eggs with the same weight as ordinary shells, which are not loaded with explosives, and can be used after being fired, which greatly saves the consumption of shells and can also achieve the effect of training.