Bright Sword starts with the grenade flat.

Chapter 187 Test flight of new fighter plane!
And these 150 kilograms are enough for anything, let alone manufacturing the fuselage of the aircraft. If Liu Xiu is added, it will be enough for 900 kilograms.

Therefore, it is simply impractical to use the engines of old fighter jets like the Feiyan to build new aircraft. Although the MiG-15 and the Feiyan fighter jets both belong to the same generation of fighters, the engine performance between them is still very different.

However, because they did not have supersonic speed after all, they were still classified into the first-generation fighter category. Yes, the classification of the first three generations of fighters was basically based on speed.

For example, the first-generation fighter planes have a speed less than one time the speed of sound, that is, fighters that cannot go supersonic, such as the MiG-86, F262 Sabre, and ME Feiyan, etc.!
The second-generation fighters are fighters that can fly at supersonic speeds, but cannot reach twice the speed of sound, such as MiG-100, F and other fighters.

As for the third generation, it is naturally fighters that can exceed twice the speed of sound, such as MiG-4, F fighters, etc.

However, when the fourth-generation fighter jets are reached, they are no longer classified based on speed, because the limitations of the turbojet engine are here. Turbojet engines above three times the speed of sound are no longer applicable. Therefore, the classification of fighter jets into the third-generation fighter jets is based on speed. It stopped abruptly.

As for the fourth generation aircraft, electronic technology developed vigorously after the 1970s, so air-to-air missiles and radars have also made great progress. Therefore, beyond visual range combat is no longer a dream, and the speed of fighter aircraft is no longer The important indicators are instead the maneuverability of the fighter aircraft, as well as the performance of radar avionics and air-to-air missiles!
After all, no matter how fast a fighter jet is, it cannot be faster than an air-to-air missile that reaches four to six times the speed of sound, so the radar and avionics performance of a fighter jet are crucial.

And at this time, fighter planes are becoming heavier and heavier. The purpose is to have one aircraft with multiple functions. In addition to being used as a fighter, it must also be able to be used as a bomber.

Of course, in order to avoid radar and increasingly powerful missiles, fifth-generation fighters have improved radar evasion, that is, the stealth performance of the aircraft. For example, stealth fighters such as the F22 use stealth technology, resulting in It has an absolute crushing advantage when using the machine.

In Liu Xiu's vision, he wanted to bring the speed of the first jet fighter he designed to the level of third-generation fighters, which is more than Mach two. However, Liu Xiu's current Feiyan fighter's turbojet engine cannot satisfy Liu Xiu's speed. Show needs.

Now Liu Xiu can only hope that the buyer who buys the MiG-1 can succeed, because what makes Liu Xiu most blind at this stage is not the MiG- aircraft itself, but its heart VK- engine, because Only such an engine can meet Liu Xiu's design needs.

You must know that the earliest turbojet engine used by the MiG-15 was the Nien engine imported from the United States. However, as research found that this Nien engine also had many problems, the Soviet Union began to improve the Nien engine.

For example, the Nien engine gas turbine blades are manufactured using a process of casting first and then cutting. In the process of manufacturing the rear-end gas turbine blades, a lot of material is wasted. In the manufacture of gas turbine blades for the Klimov VK-1 engine, Soviet workers boldly adopted precision stamping and cutting processes and made bold technological innovations, saving a lot of materials and avoiding waste.

In addition, in the design of the centrifugal compressor, it was found that the compressor friction loss and flow resistance of the imported Nien engine are large, which is prone to tremor and internal stress distortion, and the flow loss and turbulence intensity of the inlet of the Nien engine are relatively large. Incomplete combustion of fuel occurs.

Therefore, Klimov vk-1 adopted the use of backward curved blades and closed working impeller in the design of the compressor, which greatly reduced friction loss and flow resistance, redesigned the shape of the inlet, and compressed the air evenly into the combustion chamber and increases the speed, the combustion chamber fuel injector is designed as a spiral shear type. In response to the low thermal efficiency of the Nien engine, the Klimov vk-1 engine optimizes the blade roots, blade grooves, blade backs, blade basins, and blade tips of the gas turbine blades by increasing the temperature of the combustion chamber, increasing the gas kinetic energy and expansion ratio, Reduce the boundary friction loss of gas momentum loss fluid, increase the number of gas turbine stages, and better utilize the kinetic energy of gas.

Of course, the gas temperature cannot be raised just because it wants to be raised. Higher alloy materials must be used, so Su State has developed a more high-temperature resistant alloy.

After such a series of improvements, not only the weight of the original Nien engine was changed from 1,300 kilograms to 870 kilograms, but the thrust was also increased from the original 2.2 tons to 2.6 tons. Ton. The thrust-to-weight ratio has increased directly from the original 1.7 points to over 3 points now!

Because of this, as long as Liu Xiu can get the VK1 jet engine, the heart of the MiG-, there will no longer be any obstacles to the design of Liu Xiu's new fighter.

Time flies by in the blink of an eye, February is here, and the steel rolling mill built outside Yuping has naturally been completed.

And all the skilled workers are already in place. In order to put their aircraft into production earlier, the workers in the steel rolling mill are all skilled old technical workers recruited from all over the inland.

However, the introduction of the MiG-15 was still a bit disappointing. The other side still disagreed. Naturally, Liu Xiu had nothing to do about it, so he had to ask the steel rolling mill to build the fuselage first.

After all, if it really doesn't work, we can just use Feiyan's engine. Of course, the steel rolling mill not only rolls steel sheets to make the fuselage of the aircraft, but the frame structure of the fuselage also needs to be manufactured by the steel rolling mill.

And there are a number of machine tools in the steel rolling mill used to imitate Feiyan engines!

"Dad, it seems that the engine of the MiG-15 cannot be relied on for the time being. Let's put the engine of the Feiyan fighter on and give it a try!"

··········
Four months passed in the blink of an eye, and it was June 1950. With the efforts of Liu Xiu and Liu Qin, a small jet aircraft specially used for air combat was finally manufactured.

Of course, the entire machine does not use aluminum but is made of forged steel as the main material, which is somewhat similar to the stainless steel body of the MiG-25.

Liu Qin looked at Liu Xiu's eagerness to try and said:
"Why, you still want to test the machine yourself! Don't forget, you are all on empty now!"

Regarding Liu Qin's words, Liu Xiuze smiled and said:
"What's wrong with Kongji? Kongji is not a human being. If I am a human being, why are the pilots under me not human beings? Besides, I was fully involved in the design of this fighter plane. No one knows it better than me!"

After that, Liu Xiu boarded the fighter plane that he personally participated in the design. The fighter plane was 9.5 meters long, 7.7 meters wide, and only 2.7 meters high.

Of course, what is even more frustrating is the weight of the fuselage. Even though the entire machine is made of steel, Liu Xiu cut corners to the extreme! In other words, due to extreme weight reduction, such as perforated skeleton structure, the empty weight of the whole machine is only 1.9 tons!
Of course, this empty weight does not include onboard weapons! Such as machine guns, machine guns and the like.

(End of this chapter)