"Due to aerodynamic reasons, the exhaust gas produces a choke effect at the nozzle. The speed of sound increases with the square root of temperature, so using high-temperature exhaust gas can improve engine performance. At room temperature, the speed of sound in the air is 340m/s, while in the high-temperature gas of the rocket It can reach more than 1700m/s…”
(Zzzzzzz…)
“To obtain optimal performance, the pressure of the exhaust gas at the end of the nozzle needs to be equal to the confining pressure. If the exhaust gas pressure is less than the confining pressure, the vehicle will slow down due to the air pressure difference between the front end and the end of the engine. If the exhaust gas pressure is greater than the confining pressure, the vehicle will slow down. The exhaust gas pressure that is converted into thrust is not converted, and the energy is wasted. In order to maintain the balance between exhaust gas pressure and confining pressure..."
(Zzzzzzz…)
"Pumping gas losses are minimal relative to thermal energy losses at the nozzle. Engines used in the atmosphere use a high-pressure power cycle to improve nozzle efficiency, while vacuum engines do not require this. For liquid engines, propellant is injected into the combustion chamber There are four basic forms of the power cycle..."
(Zzzzzzz…)
"Song Wenbin!!"
The old professor on the podium couldn't stand it anymore and threw a piece of chalk on the head of the young man who was snoring in the classroom.
Song Wenbin, who was in a daze, suddenly raised his head from the table and looked around.
In the classroom, Huo Yu, who was sitting next to him, was holding back a smile. Su Tina, who was next to Huo Yu, was looking at him worriedly. There were also some other student pilots who were snickering, and some were tensing up seriously.
"Are you staying up every night!?"
The old professor glared at Song Wenbin with dissatisfaction and said sternly: "Go back to the dormitory to sleep!"
This is Song Wenbin’s first week at the training base. Daily life at the training base is very hard. Every day Song Wenbin has to learn to survive in a missing state, sitting in a gyroscope and spinning around until he vomits, or wearing dozens of kilograms of clothing. Jumping around in his clothes, or simply running crazy circles around the playground to train his endurance. He had been trained by Huo Yu before going to Indonesia, and it wasn't too difficult to pick it up again now.
However, the only thing that made him feel unbearable and even extremely painful was undoubtedly the basic theories that astronauts had to learn, including but not limited to astronomy, geophysics, space dynamics, rocket dynamics, communications, computers, etc...
How pitiful God is, Song Wenbin has never touched a piece of paper since graduating from high school, and now suddenly a book that is higher than others is put in front of him for him to learn, it almost kills him.
But in order to complete his mission and complete the filming of this episode, he had to force himself to study and come to class. But the result was not under his control. No matter which professor came to class, Song Wenbin would fall into a coma after ten minutes of class. Those dense formulas, those complex theorems and mathematical calculations were like the best sweat medicine. faint.
"I won't sleep, I won't sleep anymore."
Song Wenbin apologized apologetically to this internationally respected old professor of rocket dynamics.
The old professor stared at him helplessly and began to write formulas on the blackboard.
Fn=mVe=mVe-act+Ae（Pe—Pamb）
“Since rocket engines do not have the air inlets of jet engines, there is no need to deduct ram drag from the total thrust, because the net thrust is equal to the total thrust (excluding static backpressure)….
(Zzzzzzzzz…)
"Song Wenbin!!"
Song Wenbin woke up again.
The old professor looked at Song Wenbin and said with hatred: "You, you, how can you get into space like this?"
"Teacher..." Song Wenbin said painfully: "This is a commercial flight... I paid for it... You know that commercial flying is to allow even the richest fools to fly into the sky. You have to learn everything, how to do business ah."
"You thought you were going to space by taking a civilian aircraft."
The old professor said angrily: "There are several commercial pilots in the world. You just need to take a ride on Musk's Dragon spaceship to learn these things. We are at this level in this era. If you can't pass the test, who dares to let you Go up, who will be responsible if something goes wrong!"
Song Wenbin:......
"I'm studying...I'm studying...what, can you teach me starting from junior high school physics? I've given back all my junior high school knowledge to the teacher." Song Wenbin said desperately and sincerely.
Old professor:......
After class, the top international professor who spent forty minutes finally explaining Newton's second law to Song Wenbin was mentally tortured and left the classroom, vowing never to let Song Wenbin sleep in class again.
But Song Wenbin was in pain. He looked at Huo Yu and Su Tina helplessly and asked, "Can you understand?"
"It's okay. In fact, in order to take care of your level, the professor has been teaching you in a very controlled manner. These are the most basic knowledge of rocket dynamics. They are only at the level of ordinary college students. Some high school graduates have better grades. Even science students can understand it..." Sutina said worriedly.
"Shut up." Song Wenbin stopped Sutina's Versailles behavior and looked at Huo Yu expectantly, "Can you understand?"
"No." Huo Yu denied immediately. Of course she didn't understand. She had no interest in these things at all. She spent the whole class playing with her mobile phone.
Song Wenbin looked relieved. After all, he was not alone.
"But Brother Song, Huo Yu passed all physical fitness tests with perfect scores..." Su Tina reminded him in a low voice.
Song Wenbin began to sweat on his forehead.
Indeed, it was the same as before going to Indonesia. Huo Yu showed complete elegance in these tests. She could climb a mountain with twenty kilograms on her back without any expression, and she could also show no expression when Song Wenbin and Su Tina fell out of the revolving seats and vomited. Almost all the reserve astronauts were amazed at Huo Yu's physique. Team Leader Han, who was leading the team to train them, believed that she was a natural astronaut and wanted to take her to visit the spacecraft in advance. She sat here to study, purely out of friendship. Accompanied by two other colleagues.
"Damn it, I also need to learn how to do it."
Song Wenbin said to Huo Yu: "I want to become as strong as you, you train me."
Huo Yu glanced at Song Wenbin, but he seemed a little uninterested.
Having been a colleague for so long, Song Wenbin could tell at a glance that Huo Yu was worried. Under normal circumstances, Huo Yu would have been very happy to hear such words, and might have dragged him to the training ground to start training on the spot, but this time What's the matter with looking so sickly?
"What's the matter, frost hits the eggplant?" Song Wenbin asked.
Huo Yu looked at him with no expression on his face.
Sutina snickered from the side and said: "Three days in Hedong and three days in Hexi, she is also on the hot search."
Song Wenbin was shocked. Huo Yu was also on the hot search?
So he took out his cell phone and wanted to take a look, but Huo Yu pressed it down. She frowned and said displeasedly: "There's nothing interesting to see, so don't look at it."
The more she said this, the more curious Song Wenbin became. He avoided Huo Yu and quickly opened Weibo. Sure enough, there was an item on Weibo's hot search list - Huo Yu hit someone.
Song Wenbin was stunned when he saw this hot search, Huo Yu hit someone? Huo Yu did beat people, not only many criminals he saw during the trip, but even Weining was beaten by Huo Yu, but... hasn't it been a while since these things happened? In recent times, Huo Yu has been She was busy with company matters and special training at the training base, but she didn't hit anyone at all. Why is her hitting someone a hot topic now?
Confused, he clicked on the hot search.
It turned out that it was the well-known D-site blogger Old Tom King who posted a video. [What is it like to be the ultimate female boxer? 】
After watching the playback, Good Guy has more than 20 million.
When I opened the video again, I saw a man's slightly teasing voice, accompanied by some familiar and slightly humorous music.
"In June 2013, as the competition whistle sounded, a 20-year-old woman fell heavily on the ring, bleeding from her mouth and nose, and fell into a coma. The unconscious woman's name was Wallenda. Shevchenko is the famous triple champion of women's fighting bantamweight and a super fighter known as the Siberian Tiger. She has dominated the European bantamweight arena for five years. However, at this moment, Varun is at the peak of his life. Da meets the first and last real rival in her life.
Because after this battle, Wallenda said goodbye to the ring and retired permanently due to a moderate concussion.
The initiator of all this, the fifteen-year-old genius girl standing in front of her, was known as Ryoko Rain at the time. Now, of course, she has a name we are more familiar with.
She is the true practitioner of female boxing, Kagura Chizuru who lives in the real world, the beauty benchmark in the field of Sanda, and the three-dimensional incarnation of the God of Khorne. Hello everyone, I am the new up owner Old Tom. king.
In 1999, Huo Sanlida I. Yu was born in a family in Kowloon District, HK..."
Song Wenbin only watched the beginning of the video and quit.
Look at the comments again and be the first to like.
King Old Tom: "With more than 500,000 likes, I hate the teacher."
Song Wenbin turned off the video with a headache and looked at Huo Yu.
"ryoko?"
"Yeah." Huo Yu tilted his head.
"Why didn't I know you had an English name?"
"You didn't ask, and it's in Japanese." Huo Yu said calmly.
"It's Roman." Sutina whispered excitedly.
"Good guy... no wonder you drive GTR." Song Wenbin curled his lips, "You are really complicated."
This joke made Huo Yu's expression grow colder. She looked at Song Wenbin expressionlessly and said, "Don't you want to train? Let's go."
Song Wenbin looked at Huo Yu and hesitated to speak.
Su Tina on the side was twisting around, saying like a monkey next to Huo Yu: "Laugh at me, you laugh at me... Hehe, how about it, now you are also on the hot search, hahaha, I can't believe it, you are fifteen You are so cruel at the age of 10, now it’s better, everyone will know about it, and you will be blackmailed into a sieve."
"My mind is not that fragile."
Huo Yu raised his head and looked at the shameless Su Tina and said, "Just hit me, just say it, so what?"
Song Wenbin was also helpless and said: "I tell you...you really can't hit people randomly in the future. If you continue like this...this program will have problems sooner or later."
"You don't need to remind me." Huo Yu said expressionlessly.
Seeing Huo Yu like this, Song Wenbin had nothing to say. I had to follow her to train.
A few hours later, when he returned to the dormitory after training, Song Wenbin couldn't wait to take out his mobile phone again, pulled out the video of King Tom Old, and watched it from beginning to end.
The video is 30 minutes long and belongs to the hardcore ruthless series. It details the life experience of the hardcore ruthless Huo Yu, from his father's imprisonment to his mother's remarriage, from living in Japan to becoming the youngest European champion. Championship, from returning to China to join the national team, to having conflicts with teammates, to retiring like a meteor, and finally taking part in an extraordinary journey. The history of more than ten years is introduced in detail.
Song Wenbin felt numb all the way, especially when he saw Huo Yu having a conflict with a male member of the national team, classifying him as a second-level disabled player, and finally being ordered to retire.
It wasn't that he was shocked by what Huo Yu had done. He just felt that in this land of China, there really were no secrets. As long as you become famous, no matter what dirty things you have done in the past, all the dirty things can be found out for you, and even the three generations of your ancestors can be found out.
There is no doubt that Huo Yu's experience as a well-known person cannot withstand scrutiny.
Although the style of King Tom's video is very funny, it also contains elements of flattery and curiosity. Everyone is happy to see it, but those who are interested don't think so. In addition, the extraordinary journey is now at the forefront, and the topic is very high. This video is like a knife that completely tears apart Huo Yu's past, exposing it naked to the sun. Huo Yu himself didn't seem to like the feeling of being watched by the public.
Song Wenbin felt this, but was helpless.
If the previous video of Black Sutina was purely fake, he could still find some connections to get rid of it. But this video is different. The contents of this video are all fucking true. Moreover, King Tom is not an unknown little UP. He is a top player on Station D. It is impossible for him to let Seals download such entertainment videos. After all, they are entertainment stars and are not really big shots. Whether Huo Yu's past can withstand scrutiny is her own business. Who told her to act lightly or not.
Besides, even if King Tom was merciful and took the initiative to download the video, what's the use? This video is just a primer.
With this in mind, Song Wenbin clicked on Weibo again to read the comments under the hot search.
Boy, the comment section is even more real.
Even the year her father was imprisoned and the crimes he had committed, as well as photos of the male national team member who was injured by Huo Yu, photos of his injuries when he was beaten, and injury certificates issued by the hospital all appeared. When it comes, nothing can be avoided, and all of them are regarded as useful information and receive a lot of likes.
Before becoming famous, no one may have cared about these things, but after becoming famous, everything they do will be carefully observed under a magnifying glass.
Looking at these comments, Song Wenbin had a headache. If they were just entertainment stars, if they were just simple outdoor hosts, this kind of thing would be exposed. After all, it is a thing of the past. As long as they can entertain the public in the future and film well. Program, it’s okay to be scolded and hacked.
But now their program is in a very sensitive position. Regarding the country's image, he was very worried that this incident would affect the impression of Huo Yu above him, causing the program to fail.
The words have been released, the flag has been set, the company has been widely spread, and investors may have even paid.
If the mission cannot be carried out because of Huo Yu's past, then they will really become clowns, pure clowns.
(End of chapter)
