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Chapter 828: Nanyang's Advantages (Third Update, Please Subscribe)
World number one!

No one has ever doubted that being number one in the world can indeed bring national glory.

In fact, when Li Yian delivered his speech “We are going to march into space”, sounding the clarion call for marching into space and attracting the attention of the whole world,
A top-secret experiment is being carried out secretly at Nanyang University - the development of a communications satellite.

In fact, as early as four or five years ago, British scientist Clark explored the possibility of establishing a communication relay station outside the earth.

Now the team headed by Yuan Jialiu, which brings together the most outstanding professors, doctors and graduate students from Nanyang University, is trying to develop an artificial satellite that can turn Clarke's prediction into reality.

"…All communication subsystems of the satellite are developed by modifying commercial equipment. Four antennas are installed on the surface, two of which are transmitting antennas and two are receiving antennas. It can not only broadcast radio and television signals, but also transmit telephone signals, making intercontinental calls possible."

Zhao Qingyun pointed to the drawings and introduced the overall design of the satellite to everyone present.

Although the overall design of the satellite was completed, Yuan Jialiu still frowned. As the chief engineer, he knew very well what the biggest problem of this satellite was.

"life!"

Yuan Jialiu interrupted Zhao Qingyun and said.

“How long is its lifespan?”

"Engineer Yuan, in order to extend its working time, we have used a larger nickel-cadmium battery with a larger battery capacity. With the battery power supply, the satellite's working life is expected to reach 17 days. However, its main purpose is to verify whether the Wanhu-17 missile can be launched into orbit and the satellite's communication relay capability. Therefore, days of working time can basically meet the requirements."

Zhao Qingyun's answer made Yuan Jialiu speak directly.

"It is very expensive to basically meet the requirements. The cost of a "Wanhu-300" missile is almost a million yuan. Add to that the satellite. Each launch costs at least 300 million yuan. 17 million is just for days of work... Nanyang is not that arrogant!"

The space industry is a money-burning business. Every launch means spending a lot of money. In this case, it is necessary to make every launch in the South China Sea more cost-effective.

The exploration of space can only continue if it is cost-effective enough. Otherwise, failure is bound to await Nanyang in the end.

After all, if you keep burning money, you will eventually run out of money. Even as an engineer, Yuan Jialiu firmly believes this.

After all, cost control is basic common sense. Only by controlling costs, or making the most of every rocket launch, can the space industry continue.

So now he is more concerned about how to make expensive satellites work as long as possible so as to control costs.

Looking at the people present, Yuan Jialiu spoke directly.

"So we have to solve the problem of power supply... We have to make it work in space for a long time, one year, two years, three years, or even ten years. The longer it works, the lower the cost."

After Yuan Jialiu made this request, everyone fell into silence. Suddenly, someone in the corner spoke.

“What if you could recharge the battery?”

"Charging the batteries?"

Yuan Jialiu looked in the direction where the voice came from, looked at the young man who spoke, and asked.

"What's your name?"

Liang Zhenhua replied.

"Engineer Yuan, my name is Liang Zhenhua, and I am..."

Yuan Jialiu asked before he finished speaking.

"So what do you think?"

"I thought we could try solar cells."

"impossible,"

As soon as his suggestion was put forward, someone objected. "We have done calculations in this regard. Using solar cells will make the satellite seriously overweight. It is not suitable for use on satellites."

Liang Zhenhua nodded and said.

"Yes, if we use cadmium sulfide solar cells, they will definitely be overweight and their power generation efficiency will be too low."

Although Odubot and Stola made cadmium sulfide solar cells as early as 1932, they had no practical use due to their low efficiency.

"But in May this year, Chabin, Fuller and Pearson of Bell Labs in the United States developed a single-crystal silicon solar cell with a conversion efficiency of 5%. This is a solar cell with practical value. Two months ago, Will discovered that nickel arsenide has a photovoltaic effect and deposited a nickel sulfide film on glass to make a solar cell. I think solar photovoltaic power generation technology is now of practical value, and we can definitely consider introducing these two technologies."

As soon as Liang Zhenhua finished speaking, Yuan Jialiu picked up a pen and started to calculate. It was nothing more than the power consumption of the equipment and the electricity provided by the solar panels. Soon, he got the answer, raised his eyebrows slightly, and said.

"Yes, it should be possible!"

After saying that, he looked at Liang Zhenhua seriously again and said.

“Immediately send someone to the United States to negotiate with Bell Labs about introducing solar cell technology.”

In fact, this is also the biggest advantage of Nanyang's development. As a member of the Commonwealth and a member of the Western world, it can import all kinds of technologies and equipment from Western countries as long as it is needed. In contrast, the Soviets absolutely do not have this convenience. It is also thanks to this that in the past few years, Nanyang has been able to introduce a large number of advanced technologies from Britain, the United States and other countries, promoting development in all aspects.

Now that the space industry needs new technologies, just introduce them directly.

In contrast, the Soviets could only steal through agents, which obviously took time.

Just as Yuan Jialiu sent personnel to the United States to negotiate with Bell Labs on the introduction of technology, in the office of the official residence more than ten kilometers away, Li Yian was staring at the drawing in front of him - this was the engine drawing of the Wanhu Type 5.

"…The booster in the rocket uses the YZ-109 engine, and the core stage uses the YZ-110. In fact, the basic performance of these two types of rocket engines is very similar. Most of the YZ-110 engine units can be integrated with the YZ-109 engine units, which reduces the cost of developing and refining the engine. The biggest difference between the two is that the YZ-110 has two additional loitering engines for adjusting the rocket's attitude.

Compared to the V-2 missile, which uses the gas rudders under the engine to adjust its attitude, the Wanhu- missile uses a wandering engine to achieve the same effect while having stronger attitude control capabilities.

It is equipped with five rocket engines, one for the core stage and one for each of the four boosters. Each engine has four combustion chambers.

Although Eugene was the chief designer of the Wanhu-5 rocket, he was best at designing rocket engines. Many of Nanyang's rocket engines came from him, and it was under his leadership that Nanyang established a complete rocket development and testing system.

In the process of scrambling for German rocket technology, although Nanyang was indeed behind the United States, this did not widen the gap in rocket technology between the United States and the Soviet Union. On the contrary, Nanyang, like the Soviets, developed intercontinental ballistic missiles before the Americans through rigorous testing and based on the German V-2 missile technology.

Although... the test launch has not been successful yet, it has failed twice.

"It uses liquid oxygen/kerosene propellant, a propellant combination that has been used on the YZ-106. The combustion chamber pressure of this type of engine is 5.89Mpa, the sea level thrust is as high as 833.98 kilonewtons, and the vacuum thrust exceeds 1000 kilonewtons."

Finally, Eugene emphasized.

"After repeated inspections, we have further optimized the engine, turbo pump and other control systems. I believe that this time, we are fully confident of success."

After saying that, Eugene just looked at His Excellency straightly. The success of the Soviets deeply stimulated him. He hoped to send the Nanyang satellite into space as soon as possible before the Soviets.

To this end, they re-examined tens of thousands of drawings in just one and a half months to find design loopholes and eliminate some potential problems.

Now, it is time to conduct a third test launch. Of course, the third test launch still needs the approval of the military. After all, the military is now in charge of this project.

But surprisingly, in Eugene's view, Li Yian, who blew the horn, did not seem to be in a hurry at all. He did not even care about the third test launch. It seemed that his interest was in other aspects.

"Liquid oxygen/kerosene propellant... this!"

This doesn't seem to be the best choice, Li Yian said after thinking about it.

"Have you experimented with other fuels?"

(End of this chapter)