"Then don't go, there are so many Tartars here, I think I want to come to Tartars to cross the sea and attack the island, in order to avenge your army's sweep of Jinfu Erzhou last year, the Tartars will be revenged, and Vice General Yang has to guard against it!" Gao Qiqian reminded with a worried look of kindness.

"Thank you Gonggong Gao for the reminder, Yang is grateful!" Yang Wenli hugged his fists and thanked him.

The Tartars had been deploying heavy troops on the opposite bank for a few days, and it was indeed possible to sneak attack the island, so Yang Rentian and Yang Renyue both temporarily gave up practicing equestrianism and tried their best to guard against Jiannu.

Of course, it was not easy for the Tartars to land on the island, and even if they could build so many ships, it would never be possible to use a large number of cavalry to land on the island.

If it is a foot battle to seize the beach, even if the Tartars come ten times as much, it will be in vain, and the Black Armor Army will definitely let them know the power of the bow and arrow in their hands.

Changsheng Island is close to the land side, and there is a defense line that is more than 100 miles long, and at present, the logistics department, Liu Xingzuo's department, and Albugu's department are patrolling day and night with cavalry, leaving no loopholes.

After Yang Wenli entertained a sumptuous seafood feast, Gao Qiqian and his entourage left the island and returned to Beijing that afternoon.

Although there happened to be an excuse to fool him through this time, it will not be so easy next time, and Yang Wenli feels more and more that time is pressing.

In fact, Jiannu sent a large army to garrison the north and south Erxunkou, but only to prevent the Black Armor Army from landing and invading Jinfu Erzhou, the northerners have never been accustomed to water, and Jiannu has no ability to cross Haideng Island at all, which Yang Wenli knows very well in his heart.

Therefore, he didn't worry about defense at all, it was all Yang Rentian, Yang Renyue and the logistics department discussing the defense plan, and he was still concentrating on developing mortars.

Nowadays, the problem of the gas telescopic rod has been basically solved, and the next focus is on the steering machine.

The gas telescopic rod of modern mortars is a high and low machine, which is the key component to adjust the elevation angle of the mortar, and it is mainly to adjust the firing range of the mortar.

But the mortar designed by Yang Wenli is a little different, he borrowed from the grenadier technology of the little devil, its range is adjusted by the screw with a firing pin at the bottom, and the technical difficulty of the high and low machine is greater, Yang Wenli canceled that function.

The steering machine is responsible for adjusting the orientation, the principle is very simple, similar to the track of the machine tool, a precision toothed belt and two gears of size, and a fixed sliding roll, the large gear and the toothed belt kiss, driven by the large gear pinion, you can do the left and right 10 ° of the more precise azimuth adjustment.

The direction machine is related to the precision strike ability of the mortar, and all the gear and tooth belts must be very precise, and the difficulty is actually quite a lot.

However, Yang Wenli is now a little open, and his powerful divine sense can ensure the absolute precision of the mold, so this problem, for him, is just to spend some more time.

In line with the principle of excellence, ten days later, Yang Wenli used the lost wax method to cast a highly accurate directional machine with a high precision of 10 degrees on the left and right shooting boundaries.

Next, he used the lost wax method to cast the more easy-to-develop but indispensable parts such as two-legged brackets and gun hoops.

At this point, a mortar was developed, and he did not stop for a moment, assembling the parts that had been developed into a complete mortar.

It is said that it is complete, but in fact, there is still an optical sight, and that thing is omitted because it is too difficult, and it also involves optics, advanced mathematics and ballistics.

The ancient soldiers were not literate, so too advanced knowledge was not suitable for them, and Yang Wenli planned to completely simplify it, only firing cannonballs with a fixed elevation angle of 45 degrees and a fixed propellant.

Anyway, for the time being, there is no enemy that is too strong, and the performance of the mortar is too good, which is also a waste.

Yang Wenli arranged for someone to call Wang Rucheng and several of his assistants, and he first pointed to the mortar assembled in front of him and asked Wang Rucheng: "Rucheng, the mortar has been developed, and the mortar shell is mass-produced?" ”

"Not yet, at the moment we have only mass-produced simple grenades, and the technical difficulty of mortar shells is much greater, and we are tackling technical problems."

Experiments and mass production are completely different things, the experiment is only an experiment or two, and it is made by people who understand technology, and mass production must be 100% safe and reliable, and it is much more difficult to manufacture it by ordinary workers.

"What are the difficulties, you tell me." Yang Wenli knew that mass production was not easy, so he didn't blame him, but asked him in a consultative tone.

"First of all, there is the problem of the launch tube, although we stipulate the amount of propellant, but everyone has differences when loading, some places are tight and some places are loose, resulting in inconsistent range, and even random flying and other problems.

Secondly, when casting the shell shell, there are still a small number of problems, because the workers are not professional, there are scrapped shells from time to time, shell sampling, the pass rate is only more than seventy percent, we are training workers to solve the problems encountered in practice.

The last problem is the collision of the fuse, which exposes a lot of problems, and we cannot be 100% reliable for the time being, which is fatal, and may cause the shell to explode in the barrel, and we are solving the problem one by one. ”

Wang Rucheng said three major problems in one breath, and there may be other problems, but they solved them one by one.

"Hmmm! Quality first, we will never allow unqualified artillery to be discharged from the factory, you also have to standardize the process, the responsibility layer by layer, from every shell to every worker and the technician who is specifically responsible, we must be responsible for every accident responsible, so that workers can truly understand the importance of quality. Yang Wenli nodded in approval and instructed.

"Whoa! The subordinates got it. Wang Rucheng nodded in response.

"Although the mortar shell has not yet been mass-produced, you also rarely have time, take this opportunity, let me explain to you, the function of this mortar, I will start with the following."

Yang Wenli pointed to the mortar in front of him and began to explain, he squatted down and pointed to the seat plate and explained: "This is called the seat plate, which is the part that bears the recoil of the mortar, and on it is the range adjustment screw, the top of this screw is equipped with a detachable firing pin, we adjust the lifting of the screw through this adjustment nut, and correspondingly, the firing pin in the gun barrel is also raised and lowered, so that we have achieved the purpose of adjusting the range."

This is the barrel, due to the single function, I will not talk about it, the support frame under the barrel, called the gun carriage, consists of two support feet, a gas telescopic rod and the direction machine above.

Originally, this gas telescopic rod should also have a high and low machine, which is a key component to adjust the elevation angle, but I canceled it, because firing artillery shells is a very advanced science, called ballistics, even I don't know, our soldiers are illiterate, and they don't understand it even more, so there are too many functions, too complicated, and it is harmful.

The function of this gas telescopic rod is to cushion the aftershock of the shell when it is fired, so that the gun body can be quickly restored. ”

Speaking of this, Yang Wenli stood up and pressed the cannon barrel hard with his hand, only to see the cannon body get off the seat, and then quickly recovered, and he demonstrated the function of the gas telescopic rod with practical actions, so that they could understand it at a glance.

……