Jiang Ruiyuan, who returned to China after signing the "Joint Declaration of the United Nations", was so angry that he kept scolding his mother after learning that the Northwest Independence had bombed the Japanese army's Yuncheng Airport.

However, it didn't take long for the Japanese army to win successive battles and take Burma, Jiang Ruiyuan was completely panicked: the China-Burma Highway to Burma is now the only passage for the Sanmin government to the outside world, and once the Japanese army cuts off the China-Burma Highway, the consequences will be unimaginable......

As for the railways in the northwest: in this era of underdeveloped information, even Pakistan, with its extensive railway network, is still considered to be in a barbaric era; The government of Ma Xuanzhong Qinghai, which has been helping Pakistan rebuild the railway, has been in charge of the Pakistani part of the Karakoram Railway for security reasons.

Therefore, when grain from the United States and Canada was continuously transported to China along the Karakoram Railway, Jiang Ruiyuan, who was blind to Ma Xuanzhong's rule, regarded the China-Burma Railway as the last straw to save his life......

However, Liuyun did not intend to reveal the existence of the Karakoram Railway to Jiang Ruiyuan's government, because of Jiang Ruiyuan's misdeeds, the Central Plains region is not far from hell: the tragedy at the mouth of the garden caused by the excavation of the Yellow River embankment in 1938 is far from poisonous; And if nothing else, 1942 was another year of great drought......

Although the three provinces of Qingxing, Xinggan and Gansu had been transforming the desert and increasing the amount of arable land, it was not until the autumn of 1941 that the grain produced in the northwest was self-sufficient.

In order to keep its own blood transfusion line, the government of Chiang Ruiyuan formed the Chinese Expeditionary Force composed of the 5th, 6th, and 66th armies.

On February 16, 1942, the second day of the Lunar New Year, an expeditionary force of more than 100,000 people rushed to Burma.

A few days after the expeditionary force set off, more than 100 people were transferred from the 44th Sniper Regiment to form a "Tropic of Cancer" squadron led by Liu Xuanping, and rushed to the Savage Mountain area of Myitkyina, Myanmar, to conduct tropical jungle adaptation training......

Seeing that his old man sent nearly one-tenth of the elite of the 44th Regiment, Ma Xuanzhong was a little surprised: "Dad, are you not optimistic about the future of the expeditionary force?" ”

"Mechanized troops can't be deployed in jungle areas at all," Liuyun explained with a wry smile, "and the brutal environment of the rainforest area is not something that people in the interior can imagine. After training in French Indochina, the Japanese army has gradually begun to adapt to the environment of the tropical jungle area......"

"The most important thing is," Liuyun sighed and looked at Ma Xuanzhong, "The toughness of the Japanese is not comparable to the strong men brought by Jiang Ruiyuan. ”

"That ......"

"Do your best, obey the destiny of heaven."

"Oh."

Ma Xuanzhong nodded: "By the way, at the end of last year, when the Eighth Route Army was guarding Huangya Cave, it damaged some of the equipment......"

"You just have to look at it, and now the Northwest is basically on the right track. For some time to come, my focus will be on jets. ”

Ma Xuanzhong cautiously added a sentence: "What about the navy?" ”

Liuyun thought for a while and smiled: "It's okay to let Reinhardt follow the wolf pack tactics, but be careful, give up your money and your life." ”

"Got it."

……

Jiuquan's turbofan engine is about to be finalized: Liu Xuanying's aero engine institute has finally built a jet engine that can be mass-produced with great effort......

Because of this turbofan engine that exceeded the "due date" for more than half a year, Liu Xuanying wanted to hide from his old man.

Originally, the design task was ambiguous, and there was a lot of room for operation; Moreover, when Liuyun issued the task, he reminded him that he could develop a turbojet engine first, and he would practice his hands first.

But the success of the rocket launch seems to have given Liu Xuanying great self-confidence: he has already had the experience of a pre-research failure, and it should be enough to add a complete fluid model and combustion model......

As a result, Liu Xuanying asked the people of the Aero Engine Institute to take the engine data codenamed "Spey MK202" given by Liuyun and copy it directly, so the tragedy happened: the engine developed by the aero engine could not even pass the simulation verification......

Liu Xuanying, who was hit again, learned wisely and started from scratch: first used the supercomputer codenamed "Chenxi" at the Jiuquan base to build a rudimentary turbojet engine model, and then added other things, such as compressors and the like......

After tossing and turning for several months, the people of the Aero Engine Institute finally discovered a problem, the turbojet engine and the turbofan engine are fundamentally two different things.

The intake air of the turbojet engine passes through the compressor, combustion chamber, gas turbine and afterburner, and the exhaust expands due to combustion, and the speed is greater than the intake speed.

The intake air of the turbofan engine passes through the fan, compressor, combustion chamber, gas turbine and afterburner, but when discharged, because more gas turbine is pushed to do work, coupled with the low-speed intake air mixed with part of the outer duct, the exhaust speed is slightly smaller than the intake speed.

The exhaust velocity of the turbojet is fast, and correspondingly, the energy loss is also large, and the efficiency is relatively low.

However, turbofan engines are not without disadvantages, because the gas works longer on the turbine, and correspondingly, the heat resistance requirements of the gas turbine are also higher......

Liu Xuanying, who felt that something was wrong, immediately transferred some of the personnel of the 202 Liquid Rocket Engine Institute to the Aero Engine Institute to help.

Later, Liu Xuanying pulled his third sister Liu Xuanhui from Jiayuguan to Jiuquan.

By the time the people of the Aviation Development Institute gradually found the way to develop turbofan engines, there were as many as six or seven hundred researchers involved.

At this time, Liu Xuanying realized that the phrase "aero engine is the flower of industry" said by his old man refers to jet engine.

After passing the design barrier, when processing, the moths are also endless: the bullish titanium alloy blades are actually distorted and "soft" elongated during processing; The flame cylinder of the combustion chamber is too thin to be processed; Gas turbines require special handling......

When the first prototype rolled off the assembly line, the workers in the engine workshop cried excitedly.

Because of the complexity of the turbofan engine, the test of turbofan engine is also far more complex than that of piston engine.

Therefore, before the design of the turbofan engine began, Liu Xuanying transferred a group of people from the designers in accordance with Liuyun's instructions to set up the first research institute in the northwest that had a code name without results - the 301 Aero Engine Laboratory.

The 301 Institute has also become the largest research institute in the history of Northwest China: there are three kinds of test platforms alone, ground test benches, high-altitude test benches that can simulate high-altitude environments, and flight test benches modified with transport aircraft; There are as many as 1,000 personnel, and even the backbone of the six research institutes that have been established in the northwest have been established in 301 institutes.

(End of chapter)