1044: C1044 The Body of the Rear Machine Has Been Modified a Lot

C1044 The Body of the Rear Machine Has Been Modified a Lot

Thinking of history, Qin Guan had mixed feelings. In history, J-8 and RB199 had just brushed past each other.

In the past, because of the low level of technology in Han Country, there was no advanced plane. Thus, they were forced to create a double modified J-8 Interceptor on the basis of J-7. However, the level of technology was still very low, and they did not have much of an advantage.

In the 1980s, the western gate opened, and they went to the western gate to take a look. Only then did they know how far behind they were. So... At this moment, Han Country started to move towards the west. They hoped to rely on the technology from the west to develop their own planes.

They also took a fancy to RB199. The western market used RB199 to exchange for J-7's engine, and 6601 also planned to use RB199 to exchange for J-8's engine.

However, at this moment, the project of annihilating the Kaboom 7 suddenly leaked out. When the western side heard that Han Country was developing this kind of annihilation bomber, they immediately became cautious.

From this point, it could be seen that the western side would not sincerely hope for Han Country to become strong. Even if Han Country had an advanced fighter aircraft, it would not allow Han Country to have a bomber. After all, the attack power of the bomber could pose a threat to the west.

The west thought that the Han Country buying RB199 was for the annihilation of Kaboom 7. Now it was awkward. At that time, the J-8 was a secret project. The west did not know that 6601 had difficulties that could not be described with words. In the end, ， when the western gate was closed, the J-8 no longer had any hope of changing the engine.

Now, the situation had changed greatly. After the Male Cat Fighter was introduced, the J-8 project would no longer be a secret. It had become a project for the sale of weapons. Under such circumstances, he changed the J-8 into a world-class engine and pushed it into the international market. That was very normal.

After the 6601 place suffered a self-sustaining loss, it also made up its mind. Not only did it change the transmission function of the J-8 2, it also completed the matching of the new engine.

Now, Qin Guan stood at the back of the J-8 and could see that there were obvious changes.

In the past, the J-8 used a hood.

With the power of the jet, humans had entered the era of supersonic flight. Due to the suppressive effect of supersonic flight, the exhaust pressure of the engine increased. This resulted in the drop rate of the jet tube (the pressure of the engine's exhaust at the intersection of the jet and the environmental pressure) increasing as well, reaching 15-20. Or even higher.

At this time, the ventilation of the nozzle was working under extremely low expansion conditions. Even the thrust loss was as high as a few dozen percent! In order to "recover" this part of the thrust, the designers of the engine installed a jacket tube or a hood at the exit of the main jet tube. It was equivalent to adding a tube-shaped skirt on the outside of the pleated skirt, which was the jet tube.

The lead jet tube made the engine at the original contraction end of the main jet, which was the solar current section, add a new exit section of the launcher at the back. This way, before the main airflow left the engine or the plane, it brought in a new flow of air. This caused the total exhaust flow to increase. Moreover, this type of nozzle allowed the airflow to continue to expand. It further increased the rate of the exhaust and increased the propulsion of the engine.

However, these were all theoretical, and there were no specific formulas that could be described in theory. Most of them came from the experiments of the plane.

The tail cover of the jet used by the J-8 was not only very heavy, but it also did not have the effect of the tail cover. It would only cause the propulsion to be lost for nothing.

This kind of thing... It was designed to be popular in the 40s and 50s. But in fact, apart from a very unique state, the performance of the tail cover of the radiator could not be calculated at all. It could only be deduced by the results of the experiment.

In the past, when the J-8 was designed, it was actually designed to touch a rock and cross a river. It basically came from the J-7. This naturally had many flaws.

Now, after the RB199 engine was installed, the tail cover of the cumbersome tractor was removed. This was because the third-generation engine had its own exhaust pipe. These exhaust pipes were more advanced and belonged to the expansion type.

The expansion nozzle could be seen as a "double pleated skirt" that was connected to two small ends. It shrunk and then expanded the jet nozzle, allowing the airflow to reach the speed of sound before it further accelerated to supersonic speed. Because this type of jet tube could be adjusted at the end of the contraction section (throat) and the expansion section (exhaust pipe), it had good supersonic performance as well as excellent supersonic performance.

The J-8 finally removed the tail cover of the engine, which made Qin Guan feel happy. Of course he knew that this thing would definitely be removed, but it was going to be in the 1990s in the future.

After all, the expected profit of this design was actually the result of the designer's past experience and subjective speculation. It lacked rigorous scientific and engineering basis. Later on, Bear Country did a lot of modification and comparison experiments on the old model and compared the flying. Among them, it involved the experimental proof of the tail cover of the radiator. This thing was useless.

Therefore, in the 1990s, as the relationship with the Bear Country eased up, the experts of the Bear Country were used to modify the tail design of the J-8 series in the form of technical assistance.

This way, the tail of the plane was greatly modified. Other than the tail spray, it was also the tail that made people criticize it.

It could be said that with this modification, the rear body of the J-8 had undergone a huge change. As for the front part, there was not much change.

The head of the plane was the same. The cockpit had a three-piece wind block. The back of the plane was very tall. The pilot did not have any backward vision. It still looked like an underground Second-generation Aircraft.

"President Qin, how about we modify this plane?" President Koo asked Qin Guan.

Qin Guan nodded. "The rest of the modifications are not bad. If the engine and the air inlet are compatible, the performance will be greatly improved."

President Koo nodded immediately after he said that. "Yes, it will be a brand new improvement. Our plane will definitely be able to defeat the J-11 and get an order from the Air Force."

Qin Guan could not help frowning when he heard President Koo's words.

To the 6601 Air Force Machine Company, it was the big brother who developed the military aircraft in Han Country. Of course, they couldn't tolerate the fact that they didn't have a good product. Now, they were trying their best to improve their aircraft. There was only one thought in their mind, and that was to give their fighter jets to the air force to equip them.1

But, was that possible?

The fighter aircraft equipped by the Air Force had to be able to produce on its own. The landing gear wasn't a big problem, but the engine was a big problem! If the engine of this plane needed to be imported, it would be stuck in Western World at any time.

"What's wrong? President Qin, do you still think my plane can't satisfy the needs of the air force?" President Koo saw Qin Guan's expression and could not help but ask.

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