During World War II, Eagle Sauce, which had been using the Niu Niu Merlin engine, was unwilling to develop a star engine with up to 2,500 horsepower. However, because the technology tree of the in-line V-engine was not lit, the performance of the tank diesel engine in the United States after the war has been lagging behind Niu Niu and Mao Xiong.

Although Eagle Sauce's civilian gasoline engine has always been far ahead, it is different from civilian technology, military high-power diesel engine engine technology, without technical accumulation, it is difficult to succeed just by copying and pasting.

So, the greedy Eagle Sauce hit the idea on Hans Leopard's head, wanting to rub Hans Leopard's high-power diesel engine technology, but Hans Leopard has been strictly guarding and failed......

Later, Eagle Sauce, who had a lot of self-esteem, simply continued the aviation-launched technology tree on the tank engine and went directly to the gas turbine......

And my rabbit fell out with the woolly bear, his own technology tree was a little incomplete, and the high-power tank engine technology was not up to par, until the money-greedy Hans Leopard gave the rabbit the opportunity to show his "writing wheel eye": the rabbit took the time to "describe" the Hans Leopard's 870 series high-power tank engine at a glance......

For the Northwest, which has already lit up the tank to launch the technology tree, the power of the inline engine may not be able to catch up with the star, but it will be of great benefit to the future.

Liu Xuanying, who knew that the inline aircraft engine had a bonus to the research and development of high-power tank diesel engines, her eyes lit up, and she wanted to leave when she picked up the information, but she was stopped by her old man.

"How well have rocket engines been studied?"

Liu Xuanying turned his head and smiled mysteriously: "Dad, thanks to our family Xuanliang, the technology of liquid fuel rocket engines has advanced by leaps and bounds. ”

As soon as he heard Liuyun, he knew that Xuan Liang had come to Xiaozao for his girlfriend in private, and sighed with a smile: "There are thousands of precautions, but it is difficult to prevent thieves." ”

Liu Xuanying smiled proudly: "Anyway, the meat is rotten in the pot." ”

"When will I be in place?"

Liu Xuanying looked at Liuyun with a smile, and didn't answer directly: "Then it depends on your daughter-in-law's decision?" ”

Liuyun glared at Liu Xuanying, thought for a while, and then spoke: "Is your plan dimethylhydrazine and nitrogen tetroxide, or liquid oxygen kerosene?" ”

Liu Xuanying raised her head, glanced at Liuyun secretly, and replied cautiously: "Liquid oxygen kerosene." ”

Liuyun nodded, looked at Liu Xuanying, who was silent, and knew that his daughter was lazy again, and directly materialized the information of the woolly bear NK-33 liquid oxygen kerosene engine he gave her.

Liuyun sighed: "Have you eaten the details in there?" ”

Liu Xuanying nodded.

"If that's ......?"

Liuyun stood up, opened the large safe behind him, took out a thick plan from it, flipped a few pages, found the technical parameter table inside, tore it off, and handed it to Liu Xuanying: "Since you said that you have eaten it thoroughly, let's calculate the specific plan of this type of rocket first!" ”

Liu Xuanying took a look, and her head was big: the thrust-to-weight ratio was about to be lowered, but while the size was enlarged, the thrust was also required to be raised, and it was also a double nozzle design......

And according to Liu Xuanying's experience, the pressure in the combustion chamber should be much higher than that of the MXNK-33, which almost completed the test.

Seeing that Liu Xuanying frowned, Liuyun added: "The liquid fuel plan of the new type is only used as a data reserve for NK-33, so there is no need to rush to make a plan." ”

"Oh......"

A few days later, on the empty building next to the 202nd Institute of Liquid Rockets in Jiuquan, the sign of the 201st Institute of Solid Rockets was hung.

Seeing the code name that is higher than 202, the top and bottom of the 202 Institute are their own bosses, the chief engineer Bai Yuming.

Bai Yu, who was considered to have been "wronged", was sitting in the private room of the base restaurant with a sweet face, chatting with Liu Xuanliang, the chief engineer of the "hostile" 201 Institute......

"Xuanliang, thanks to your strong support, our NK-33 engine can successfully pass the ground test."

Looking at Bai Yu with a smile on his face, Liu Xuanliang was a little unhappy, and asked tentatively: "Xiao Yu, have you received the RD-180 dual-combustion chamber liquid fuel rocket project?" ”

Bai Yu nodded happily......

"I'm sorry to bother you."

Bai Yu, who was on the rise, was a little surprised when he saw that his boyfriend was depressed: "Why do you say that?" ”

Liu Xuanliang sighed: "NK-33 is a project proposed to test the design and production capacity of Jiuquan, and the things I helped you with were poked out by my sister, so there is the RD-180 project." ”

"Oh." Bai Yu nodded.

Seeing that Bai Yu was as calm as ever, Liu Xuanliang was a little curious: "We will be opponents in the future, don't you care about our 201 project?" ”

Bai Yu smiled: "Solid rockets and liquid rockets are complementary, there is no competition, and besides, the greater purpose of solid rockets is to launch intercontinental missiles, right?" Even if it is a satellite, it is used as an emergency backup, am I right, Xuanliang-san? ”

Liu Xuanliang glanced at Bai Yu in surprise: "I remember it very accurately." ”

Bai Yu's face flushed: "I still clearly remember that when I went to the museum to check the information, when there was a solid rocket, I thought it was not, when I was doing this too much, you told me this." ”

"It's been three years in a blink of an eye," Liu Xuanliang sighed, "The student who just graduated back then has grown into a giant in the base." ”

As he spoke, Liu Xuanliang raised his head and stared at Bai Yu, and asked with a solemn face: "Then you tell me, RD-180 project, are you sure?" ”

Bai Yu nodded heavily, then looked up at Liu Xuanliang: "Do you have something to hide from me?" ”

Liu Xuanliang did not answer directly, but told a story.

There is a father who has adopted many children, and one of the boys, when he reaches adulthood, has not yet escaped the shadow of his childhood.

One day, the father learned the news that the child was in love, and just came up with a problem and asked the boy to pass it on to her girlfriend, hoping that the other party would know the difficulty and retreat.

But when the boy saw his girlfriend who was troubled by problems all day long, he couldn't bear it, and secretly helped his girlfriend.

Later, when the father learned the truth, both men and women were formally tested: both received projects that were difficult for them......

After listening to the story, Bai Yu looked at Liu Xuanliang opposite in surprise: "Are you Mr. Liu's child?" ”

The reason why Bai Yu could guess it was because as far as she knew, only the son-in-law of the Liu family would be so perverted in the entrance test.

But it was the first time that Bai Yu knew that such a test would happen to the daughter-in-law of the Liu family.

Liu Xuanliang could see the trace of doubt in Bai Yu's eyes, and nodded with a wry smile: "I am the one with the worst background among the children of the Liu family." If you feel embarrassed, you can give up, and there will be even more difficult tests in the future. ”