Seeing another prototype flying into the sky quickly, Wang Yinan secretly pulled Chief Yang aside,

"Is there any new progress in the small-thrust turbofan engine in our joint laboratory recently?" , Wang Yinan asked,

"Very smooth, the maximum no-afterburner thrust is 5.4 tons, the thrust-to-weight ratio reaches 13, and the pre-turbine temperature is now well-deserved Blue Star No. 1", Chief Engineer Yang said proudly.

"However, the reliability requirements of the engine are too high, so it still needs a very long time to test on the ground and at high altitude before the installation test."

"Why can't computer simulation be used to replace part of the actual bench commissioning workload?" , Wang Yinan cheekily asked a little white question,

"At present, the mechanism theory of various physics, chemistry, combustion reactions and fluid dynamics in the engine combustion chamber is not very perfect, and the difference between the best computer simulation and the real environment is still quite large, so the proportion of bench testing cannot be reduced", explained by Chief Engineer Yang.

Looking around and seeing that there was no one around, Wang Yinan lowered his voice, "How is your higher-level goods progressing now?" Wang Yinan asked in the ear of Chief Master Yang,

"What is a more advanced goods, a higher thrust engine is a matter of the engine consortium that has just been established, and it has nothing to do with us", Chief Engineer Yang said with a blank face.

"Don't play dumb with me, foreign countries have reported on the hypersonic vehicle you tested, don't tell me that ordinary turbofan engines can fly to Mach five hypersonic, I have seen that blurry photo, from the size and appearance, it is obvious that only one engine is installed, not a variable cycle engine is strange", Wang Yinan said proudly,

"So if you don't have a variable-cycle engine project, I'll lose your head",

Chief Master Yang glanced left and right, "It's a pity that you don't go to be a spy", Chief Master Yang pointed to Wang Yinan and said,

"If I didn't know the roots, I would have suspected that you were a spy sent by the CIA, you guessed it, of course we have a variable-cycle engine project, but there is no reward",

"I can't tell you the specific situation, I want to know that you want to go to the top first, I think you will definitely get it in your face, and I will tell you when you have the authorization", this kind of thing, Chief Yang still adheres to the principle very much.

"Okay, I won't ask about the specific situation, you can always tell me, how does our level compare with the rice country?" , Wang Yinan had to retreat to the second,

Chief Master Yang's face immediately became not very good, he hesitated for a long time, and finally admitted, "Compared with the rice country, there is still a big gap, after all, people have been studying it for decades",

"The earliest variable-cycle engine installed on the Blackbird has been nearly 60 years now," said Chief Engineer Yang.

"By the way, why are you suddenly so interested in the engine", Chief Yang was a little curious,

"Recently, I have a lot of money and want to find a money-burning project to play", Wang Yinan said half-truthfully,

"Do you know that Musk in the rice country, his own heavy-duty rocket was launched a few days ago and sent an electric sports car into space", speaking of his idol, Wang Yinan's eyes lit up,

"You said that the domestic gentlemen, at most, are to get a few Lotus cars on the highway, Faraday and other sports cars, compared with others, the gap is too obvious",

"Flying rockets are a new way to play," Wang Yinan said.

"Although I am not a rich second generation, but I have a little spare money on hand, I wonder if I can keep up with this new trend of Blue Star, and first start to fly a rocket or something in China, and also lead the new fashion of Huaguo's gentlemen."

"I have ambition, but even if it's a variable-cycle engine, I can't fly into space," said Chief Engineer Yang.

Wang Yinan took out a notebook casually, pulled Chief Teacher Yang to sit down on the edge of the runway, took out a pen, and Wang Yinan drew a ring on the notebook.

"Look at this", Wang Yinan said to Chief Master Yang,

Inside this vertical ring, Wang Yinan evenly placed three vertical engines, and pointed to these three engines, "The number of engines can be based on the requirements of thrust, three, four, five, six can be",

"The engine is a variable-cycle engine, and it does not need an APU (auxiliary power unit) to start, and you can use the APU on the ground, and you can just disengage after takeoff."

Wang Yinan drew an arrow on the edge of the vertical ring, "This vertical ring is a flexible material, thick enough so that the space inside is large enough to store fuel",

"When taking off, the flexible material is curled into a ring shape, which reduces air resistance",

"In this ring, a payload can be placed, such as the upper stage driven by a liquid hydrogen and liquid oxygen engine," Wang Yinan drew a pebble-like payload in the middle of the ring, and there is a third-stage propulsion rocket below the load.

"This vertical flying ring is activated by the APU on the ground, of course, at the beginning, including fuel and air can be supplied through the ground launcher, when the power reaches a critical value, the flying ring takes off with a payload", Wang Yinan roughly drew a schematic diagram of a launch stand,

"When the speed at low altitude is low and the air density is high, the engine works in the way of a turbofan engine with a large bypass ratio, and accelerates with low fuel consumption",

"When the density of high-altitude air is low and the speed is high, gradually transition from turbofan to turbojet and then to the working mode of ramjet engine, all the way to suborbital," Wang Yinan said.

"At this time, the payload ignites itself and flies into space, while the junction of the flying ring separates, transforms into a flying wing, and flies back to the base for recovery under the remote control of the ground or under the control of its own intelligent flight control program."

Wang Yinan roughly introduced his thoughts, and Chief Yang looked at the sketches he drew in his notebook and fell into deep thought.

"It's completely different from Musk's plan", Chief Yang thought for a long time and raised his own questions.

"Why not just take the rocket engine scheme?" , Chief Teacher Yang asked,

"There are two reasons, one is because the content of oxygen is very abundant on the ground and in the atmosphere, and it is too wasteful to use liquid oxygen directly without using it," Wang Yinan said.

"Of course, the more important reason is that Huaguo's rocket engine is too backward, and it can't get the RD180 of Mao Xiong, and there is no Merlin engine in Rice Country, that is, the engine used in the latest CZ5 is obtained from the aerospace port, and the gap between the specific impulse data and others is still obvious."

"So, I thought about finding a new way to use aero engines to accomplish the task of propulsion in the atmosphere."

"The basic idea is no problem", said Chief Teacher Yang.

"However, the effective working range of the ramjet engine may not be able to send the aircraft to suborbital," said Yang as an expert in this regard, and he immediately began to estimate the thrust-to-weight ratio and the altitude that could be achieved.

"I have also considered this problem, when approaching the suborbital track, you can use the liquid oxygen to supplement the intake part of the engine", Wang Yinan added a small ring to the flying ring, "here you can carry a part of the liquid oxygen to supplement the engine."

Chief Engineer Yang thought about it carefully and nodded, "The scheme of supplementing oxygen in the intake tract has also been considered by our variable cycle engine, and the preliminary experimental results have proved to be feasible", he still couldn't help revealing a little bit of dry goods,

"If this is the case, the problem on the engine side is not too big, judging from the final form of the variable-cycle engine, it is still feasible to send a load of less than a hundred tons to suborbital, so that the key to your solution is on this flying ring/flying wing complex",

"The requirements are light enough to increase the payload," said Chief Engineer Yang.

"It should also be deformable, and it will become a flying wing when it is recovered",

"Finally, it must be resistant to high temperatures, because when re-entering the atmosphere, the temperature is still very high",

"The material aspect is our strength, I don't think it's a big problem", thinking of the Gödel system, as well as the molecular braiding machine, Wang Yinan was immediately full of confidence.

"The flight control of the flying wing is still a problem, as far as I know, Huaguo has no experience in the design of flying wings, and this single-wing flight control system should take a lot of energy," said Yang Commander, finally.

"Hahaha, this must be no problem", Wang Yinan laughed three times, "If you know that the flight control system can be compiled directly from the neural network, I guarantee that you won't think so", he was secretly proud in his heart.

"As far as I know, the state is also preparing to open up the aerospace field to private enterprises recently", Chief Engineer Yang also said some of the information he knows.

"Your application at this time is in line with the general trend of the country, and it should be easy to get approved."

Wang Yinan nodded, "I've also heard of such a policy, but now there are several private companies that are manufacturing their own satellites, and rockets cost a lot of money, and it is difficult for ordinary enterprises to afford it."

Wang Yinan then chatted with Chief Master Yang about the details of the plan for a while, in general, he still gave full affirmation to Wang Yinan's plan, "The program basically does not exceed the existing technology, except for the difficulty of materials and flight control systems, other technologies are relatively mature", Chief Master Yang said,

"Since you want to play, you have to play bigger", Wang Yinan suddenly remembered that if you want to engage in aerospace, the headquarters must take into account the need for clearance, as well as the safety of flammable and explosive fuels, it is obviously impossible to put it in the urban area, he hurriedly called Zhang Qi and Qian Zhonghua,

"It is better for the headquarters to be far enough away from the city, and there can be no air routes to pass through the sky", Wang Yinan put forward a new request,

This time Zhang Qi was angry, "You said earlier that you don't want a place in the city, in order to get the land in the city with a better location, I begged my grandfather to tell my grandmother, and I used both soft and hard, and I finally got it done, you give me this one!" ”，

"The land in the suburbs is not too easy to find, there are mountains, rivers and lakes, what?" ，

"It would be nice to have somewhere to build a two-kilometer airport?" , Zhang Qi suspected that he had heard it wrong,

"Are you serious, okay okay, I'll do my best, anyway, you're a major shareholder, if you have money, do it",

"If you don't die, you won't die, I have also poured eight lifetimes of mold, and when I meet a rich generation like you, I can still play better than the most bullish children",

"Yes, you cow, I've heard of drag racing, I haven't heard of flying rockets, you're really leading the trend."