The opening sign-in starts from the research institute

Chapter 106 One light second is the difference

Chapter 106 A Light Second Makes a Big Difference

Time passed slowly, and the preparations for the rocket launch had entered the final stage, and all the staff on site were on standby.

Soon after, the countdown to launch began, and as the counting began, Fang Cheng couldn't help feeling a little nervous.

"five!"

"Four!"

"three!"

"two!"

"one!"

"ignition!"

boom……

There was a violent roar, and the orange-red jet pushed the rocket soaring into the sky. The speed of the rocket became faster and faster, as if an arrow from the string pierced straight into the sky.

In the control center, various units are constantly broadcasting the flight status of the rocket.

About 5 minutes later, the launch vehicle has sent the lander into the target low-Earth orbit.

All data is normal.

"Success!" The crowd cheered.

Although they have sufficient confidence in success, each launch may still be a challenge for astronauts. There are too many factors for the success of imaging rockets, not to mention the engineering of tens of thousands or even more parts involved in rocket launches. With the cooperation of human and material resources, once there is a flaw in one link, it is likely to bring about the failure of the entire project.

Moreover, every launch cannot be a simple repetition, and every launch will have new technological innovations.

Therefore, every successful rocket launch will make everyone very happy, because it not only means the current success, but also the progress of the aerospace industry, especially this launch is related to whether the manned landing can be carried out as scheduled next year The mission of the great mission of the month.

So, successfully started the first step, how can we not be excited and excited.

Ni Pengcheng and Fang Cheng also joined the celebration and applauded enthusiastically.

"Good! Good, good!"

"It's wonderful!" Fang Cheng kept applauding. It looked like a rocket launch, but behind the scenes, it wasn't a microcosm of the all-round rise of the Chinese nation.

"The orbit change is successful. Next, after the orbiting flight, it will start to change orbit again, enter the earth-moon transfer orbit, and use the gravitational slingshot to fly to the moon." Ni Pengcheng slowly introduced.

Fang Cheng nodded when he heard the words, and looked at the rocket orbit position displayed on the radar: "Gravity slingshot, the earth has become very small compared to us, but compared to the universe, we are still equivalent to toddlers."

"To go to a near-Earth satellite, you have to use the gravitational slingshot technology, which saves fuel as much as possible."

"Otherwise, we may not be able to go there at all, and we may not even have enough energy to slow down and complete the task of entering orbit." Fang Cheng said with emotion.

Fuel is an eternal pain point in the human aerospace industry.

After listening to Fang Cheng's emotion, Ni Pengcheng, as a professional astronaut, naturally felt more deeply about the limitations of fuel and power technology on the aerospace industry than for example.

"Fuel and power are the eternal pain in the hearts of our astronauts. Many people may not understand." Ni Pengcheng said with a smile, "Why does it take so long for a moon landing plan?"

"Isn't it just one light second away from the earth?"

"To be precise, it should be more than one light second."

"However, the distance of this light second is extremely high for the complexity of our project, fuel control, orbit selection, and control." Speaking of this, Ni Pengcheng is also a little helpless. Compared with what they have achieved Achievements, even if you have tried your best, are really insignificant in the face of the vast universe.

"Indeed." Fang Cheng nodded in agreement.

"For a rocket to fly out of the earth and enter low-Earth orbit, it must reach the first cosmic velocity, which is 7.9 kilometers per second."

"As for the speed of the launch vehicle. It's not the speed at which the rocket fuel can be jetted out."

"The basis of rocket science is the Tsiolkovsky formula. The terminal velocity of the rocket and the jet velocity of the rocket are not simply proportional, but also the ratio of the initial mass to the final mass of the rocket with the constant e as the base. The numbers are proportional."

"Easier, you can look at the ln function image. The fuel velocity is basically determined by the fuel properties. To a large extent, if the rocket wants to reach the first cosmic velocity, the ratio of the initial mass to the final mass is more important. The larger the ratio , the higher the value after the natural logarithm, the higher the terminal velocity that the rocket can finally reach.”

"Due to the limitations of chemical fuel, for a modern rocket weighing 90.00 tons, the fuel accounts for almost [-]% of the entire rocket's weight, or even more."

"The numbers are horrific."

"Every time a load is transported, it means consuming a huge amount of fuel." Fang Cheng said with emotion. Only those who understand the difficulty of spaceflight will understand how difficult it is.

Ni Pengcheng was very surprised when he heard Fang Cheng say so much, and stared at Fang Cheng a few more times in a daze: "Consultant Fang, I didn't expect you to know so much about aerospace."

Fang Cheng smiled: "It's a little bit of a humble opinion. Aerospace is a key industry in the future and a key area for the next technological explosion. For the future of our galaxy, we must pay attention to it."

"By the way, in the early years, I heard that the cost of a catty of materials for transporting loads into low-earth orbit in the aerospace field needs more than 20 yuan."

"I don't know how much it can reach now?"

Hearing this, Ni Pengcheng admired Fang Cheng's breadth of research, and also lamented the difficulty of spaceflight: "Consultant Fang has got the point!"

"This data is not a very important secret. Even if we don't tell it, international aerospace experts can probably estimate it from the launch quotation."

"It's okay to tell Fang's consultant, and with the confidentiality level of Fang's consultant, you can also know this, but just don't tell the outside world."

Fang Cheng nodded.

Ni Pengcheng looked at the radar feedback chart on the big screen. The rocket is currently operating normally. "The cost of 20 per kilogram was indeed many years ago."

"One of the most difficult problems in our aerospace industry is to control costs."

"From a distance, only by reducing the cost of transporting materials to space is low enough, can we truly accelerate the development of the aerospace industry into a high-speed state."

"From a short-term perspective, only if we control the launch cost low enough can our rockets gain greater competitiveness in the international market."

"Only with stronger competitiveness can we get more orders. Making money is second. More importantly, getting these launch missions means more launch opportunities, and thus more launch data and experience."

"These are the most valuable. We can continuously practice, verify and improve our new technologies."

"Higher technology, in turn, will lead to increased competitiveness and form a positive feedback."

(End of this chapter)