London, headquarters of BAE Systems. Pen "Fun" Pavilion www.biquge.info

When the secretary brought the coffee, Wang Dong picked up the Financial Times on the newspaper shelf for the third time, and Aziz, who was sitting opposite, was playing with his mobile phone.

Wang Dong's public identity is still only the personal bodyguard of the president of D&F Ordnance Company.

It's just that this time he brought Aziz with him, and he acted as the driver.

In the president's office across the hallway, D&F's technical experts have finished their product presentations, which are now being evaluated by BAE Systems.

It's not Zhao Yu, it's Jack Chen.

Zhao Yu has long been famous, let alone coming to the headquarters of BAE Systems, even in Edinburgh, he rarely appears in public.

Of course, "Jack Chan" is just a pseudonym.

Chen Zihao, a first-class chemist in China, is mainly engaged in the development of explosives, and previously worked in the Ordnance Research Center managed by the Military Intelligence Bureau.

Unlike Zhao Yu, Chen Zihao is a genuine scientific researcher and rarely shows his head.

After receiving his doctorate from Zhejiang University, Chen Zihao went to the Ordnance Research Institute in the northwest and lived a simple life.

In the past eight years, he has spent almost all of his time on scientific research.

Not to mention going abroad, even if it is to go home to visit relatives, there are not a few times.

A few months ago, after the scientific research project he participated in passed the acceptance of the military, Chen Zihao left the Ordnance Research Institute and returned to his hometown in Jiangxi.

According to the arrangement, after the binary explosives were officially put into production, he went to the "Xinbao" group as the chief engineer of the project as a senior engineer, and the name was to guide the "Xinbao" group to transform scientific research achievements into products, in fact, to master the core technology and avoid leakage.

Although Xinbao Group is a state-owned enterprise directly under the central government, who can guarantee that all 100,000 employees are honest and reliable?

You must know that binary explosives can not only be used to make the propellant of gun bullets, but also can be used as propellant for solid rocket engines.

When used in combat missiles, it can greatly improve the flight performance of missiles.

Because he has worked at the Ordnance Research Institute for eight years, Chen Zihao needs some time to adjust his status, and the Military Intelligence Bureau also needs time to arrange a new identity for him.

It's just that in the few months since he went home, Chen Zihao didn't adapt at all.

In Zhao Yu's words, people who have worked in secret units for too long have the problem that it is difficult to integrate and adapt to the real society.

I found him in "Dragon Four" and said that there was a new secret mission, and he agreed without asking.

Next, Tan Zihao crossed the border from more than a dozen countries under the arrangement of the "Dragon Four", and came to Edinburgh last week to join D&F as Singaporean-American "Jack Chan", and then replaced Zhao Yu as D&F's CTO and chief technologist.

As for Zhao Yu, he is now the vice president in charge of production.

In fact, Chen Zihao is only an expert in explosives and does not have much say in the field of ammunition.

To this end, the "Dragon IV" has also sent several ammunition technicians, some of whom have already arrived in Edinburgh, and others will arrive in the near future.

Fortunately, Chen Zihao brought some technical information on ammunition.

As Zhao Yu said before, after the successful development of binary propellant and the breakthrough in the layered spraying and filling process, Huaxia's ordnance enterprises began to develop countersunk ammunition, and the person responsible for small-caliber ammunition was the "Xinbao" group, to be precise, the scientific research institute under the name of the group.

Because it is a completely new field, the development progress is not fast.

Before Chen Zihao's departure, the scientific research institute of the "Xinbao" group had only determined the basic plan and was negotiating with the military to determine the caliber standard.

To put it simply, it is still in the engineering trial production stage.

The military has come up with more than a dozen sets of plans, that is, more than ten calibers to be selected, but there are three types of small-caliber rifle cartridges, and the choice will be made after completing the comparative test.

To this end, the "Xinbao" group has invested in the construction of a production line on its own, specializing in the production of bullets for comparative testing.

The production volume is not very large, and the production is carried out according to the test schedule.

As for the test work, it was organized by the Military Intelligence Bureau and arranged to be carried out at a secret base in the northwest, and the level of secrecy was very high, and there was not the slightest rumor of leakage.

What Chen Zihao brought was the design drawings of the three test gun bullets.

They are 6mm small-caliber rifle cartridges, 8.5mm general-purpose gun cartridges, and 12mm machine gun cartridges, all of which are countersunk shells with binary propellants.

Zhao Yu did not directly use the design drawings of the "Xinbao" group, but made some necessary changes.

According to Chen Zihao, the three drawings provided by the bureau are three kinds of guns and bullets to be precise, but they are actually spare tires, and the probability of being selected by the military is extremely low.

Quite simply, all three bullets are flawed.

Take small-caliber rifle bullets as an example, 6 mm is obviously a little smaller, even if binary propellant is used, unless the configuration and material of the bullet head are made to make a fuss, the comprehensive performance is at most 50% higher than the 5.8 mm rifle cartridge in service, which cannot meet the performance indicators proposed by the military.

To make a fuss on the warhead, the cost is even greater.

You must know that China is a big country, the number of rifle equipment is calculated in millions, and the consumption of rifle ammunition is even more amazing, so it is extremely sensitive to price.

Replacing steel with tungsten alloy and improving the machining accuracy of warheads will greatly increase production costs.

From the perspective of cost, it is best to use steel core bullets, which can be processed and produced by existing equipment.

In addition, two other types of countersunk shells had similar problems.

What Zhao Yu did was actually to refer to the design drawings brought by Chen Zihao to draw drawings of 6.6 mm, 8.8 mm and 13 mm countersunk bullets.

Of course, Zhao Yu also made several samples by hand.

It is only a sample, with a cartridge case, a warhead, a tow and a primer, and is not loaded with a propellant, which is mainly used to show the internal structure of the three countersunk shells.

It's not fine, it's just a sample after all.

What Chen Zihao brought and introduced to the president of BAE Systems and technical experts was the drawings and samples made by Zhao Yu.

As for the propellant, Chan only mentioned the key performance indicator, namely the deflagration rate, on the grounds of "trade secrets".

Obviously, very one-sided.

There are many performance indicators of propellant, including gunpowder power, detonation heat, flame temperature, specific volume, specific heat capacity ratio, filling density, pressure index and so on.

It's not that Chen Zihao doesn't know, but "trade secrets" can't be said casually.

Because there are no finished products, only samples, the performance indicators of the three types of countersunk shells only have theoretical calculated values, and there is no measured data.

In this regard, Chen Zihao gave a clear answer.

After the design is completed, D&F will produce a batch of countersunk bombs for performance testing, and ensure that the deviation from the theoretical calculation will not exceed 10 percent.

Chen Zihao did not brag, but had a factual basis.

That is, the deviation between the countersunk bomb and the theoretical performance of the "Xinbao" group's trial production is less than 5 percent, so the upper limit of 10 percent is already very generous.

The performance of the three countersunk bombs is obviously not to be said.