In fact, in the final analysis, the No. 2 recoilless gun is based on the classic RPG-7 individual rocket launcher, and after a series of optimizations and improvements, a single rocket launcher developed in line with China's actual needs.

Because of this, most of its internal structure is not much different from the RPG-7, especially in terms of the firing mechanism, which is almost a copy of the firing mechanism of the RPG-7, so the No. 2 recoilless gun also uses the hammer impact method to fire, and the core technology of this firing mechanism is the internal firing pin reset problem.

To this end, Bai Yi set up a firing pin seat above the hammer of the No. 2 recoilless gun with reference to RPG-7, which was equipped with firing pins, air-closed cushions, firing pin springs, firing pin spring pads, firing pin spring pads, firing pin snap rings and other parts. And there is an exhaust hole on the right side of the firing pin seat. When the rocket is fired, the high-temperature and high-pressure gunpowder gas will push the firing pin downward while spraying backwards, and at this time, the closed air cushion will close the upward gap, so that the gunpowder will be ignited and discharged along the exhaust hole on the right side of the firing pin seat.

In layman's terms, it is to use the force generated by the high-temperature gas generated by the rocket to help the firing pin to reset, so in order to make the firing pin accurately and timely reset, the sum of the energy of the rocket high-temperature gas, the size required for the firing pin to reset, the amount of displacement, and the timing of the closed air cushion need a lot of calculations and tests to finally obtain a constant effective value, according to this constant value, in order to process the firing pin seat that meets the actual needs.

Before Bai Yi went to Siberia, the calculation of the firing pin seat of the No. 2 recoilless gun was nearly completed, and the subsequent processing and manufacturing were quite smooth, but when it came to the actual targeting, there was a problem, mainly because the high temperature gas volume of the rocket was not well controlled, so that the violent high temperature did not melt the firing pin that could not be returned in the future, which led to an extremely high rate of dumb fire.

In this regard, domestic military experts have not thought about solving it, but the problem is that this set of firing pin seat itself is more complicated, as long as a subtle component has a problem, it may lead to the failure of the entire base, so for the sake of prudence, it is necessary to find a component by part, and re-calculate the structure, so that the time is naturally stretched and long.

However, it is such a headache for countless experts, but in Bai Yi's eyes, it is as simple as a jigsaw puzzle, and there is no way to make him the actual designer and structural calculator of this set of firing mechanism, because of this, Bai Yi has extraordinary confidence in the correctness of his overall design and calculation.

Joke, RPG-7 mature structure is not counted, and with the blessing of finite element calculation, so the BUFF of the bull fork is so tired regardless of the cost, if there is still a structural defect that can be pushed to the beginning, Bai Yi, a traverser, can really take the tofu and hit it to death.

Therefore, when Bai Yi learned about the mute fire of the No. 2 recoilless gun, he did not dismantle the relevant components first like others, but changed the progress of the No. 2 recoilless gun before and after going to Siberia, and then picked up the equipment for inspection.

That is, the process hole opened up on the right side does not meet the design specifications, so that the high-temperature gas can not be eliminated in time, so that the ignition blockage and reflux are formed in the firing pin seat, which leads to the damage of the firing pin and cannot be excited, as for what causes the process hole to be unqualified.

From Bai Yi's point of view, it is neither the deviation of the basic theoretical calculation, nor the unreasonable structural design, nor the mistake in the use of materials, but the main reason is that the basic processing and manufacturing links are not up to standard, perhaps the accuracy of the relevant machinery and equipment is not enough, or the technology of the relevant workers is defective, or the quality control is not strict.

All in all, there are big problems with the processing quality of the process holes, not to mention anything else, but there are three obviously different sizes of the reversible gas process holes of the firing pin seat of the three No. 2 recoilless guns used by the Chinese delegation for technical exchanges, and the error is so large that it can even be distinguished by the naked eye.

As the saying goes, the difference is a thousand miles, not to mention the error visible to the naked eye, so it is strange that the No. 2 recoilless artillery does not have a problem, since the problem has been found, naturally can not sit still, so Bai Yi used the simple tools that can be found at hand to readjust the air conduction process hole on the night before the exchange of target shooting, which is the scene that shocked the audience today.

……

"Therefore, after returning to China, it is urgent to improve the overall quality of workers and strengthen quality control, especially in terms of fine processing, even if we do not require the parts produced in our factories to be as common as those in the United States, we must move closer to this aspect.

You must know that we will not only build and rob artillery in the future, but also build aircraft, tanks and artillery, if they are so extensive production, it is not only a waste, but also irresponsible for the lives of the majority of commanders and fighters. ”

As he spoke, Bai Yi involuntarily lit another cigarette, unlike the previous indifference, Bai Yi at this moment had a sense of urgency, without him, just because Bai Yi remembered the information he had read in his previous life, which told some of the secrets of the Sino-US "Peace Pearl" plan in the 80s.

Among them, Bai Yi's most profound impact is that some of the spare parts on the two J-8 fighters provided by China are not common to each other, you must know that it is the same fighter produced by the same factory and the same workshop, and its related spare parts are not universal, which is a bit unbelievable and even more scary.

Although the Chinese have gradually leveled out the shortcomings in this area with their ingenuity and perseverance, Bai Yi feels that it is still a little too late, if we can pay attention to the strict processing and production system from the beginning of China's industrialization and cultivate benign production habits and systems, then China's industry will inevitably have a different appearance, perhaps nothing can be seen in a short time, but the dimension of time is expanded, and this rigor and meticulousness soaked in the bones will surely burst out with huge momentum.

Bai Yi thinks that he is not a very promising traverser, his first wish when he comes to this era is to live well, but when he sees the white hair of the head of the General Logistics Department, the injury on Wu Yunzhe's body, Chen Yaoyang's daily race against time, and the notebook that Lao Ge Ning wants to keep when he dies, Bai Yi knows that he should do something, since this is the case, then let China's industrialization be more professional and thorough......