Traveling through the sword to engage in military industry.

Just after the Spring Festival of 1955, a new jet engine was placed on the test bench at the Institute of Aeronautical Propulsion.

Ren Zhong, who was invited to participate in the first test, looked at the huge engine on the test bench and asked excitedly: "Is this the WP-79 that we successfully copied based on the J7 turbojet engine?"

从主世界拿到了F-4H后，任重最优先的目标就是对机上的J79进行了解剖，还用3D打印机制作了1:3仿真模型供亮剑世界的研究团队研究。

In addition to the successful research on the first generation of high-temperature alloys, the research on this turbojet engine basically completed two samples without much trouble.

"Yes, Mr. Ren, the WP-7 engine is 5.3 meters long and 1 meter in diameter. Our first version completely maintains the original appearance in terms of size. It basically restores the size and model display you provided one to one. In theory, it should be exactly the same as the design in the data drawings provided by Mr. Ren." Professor Ding Hongjun, who was accompanying him, replied.

"Of course, we have found more than 72 problems in the simulation test verification. We believe that the length of the engine can be shortened after optimization and improvement. For the engine in the ignition test today, we will keep it in the ignition state. First, we will conduct a 240-hour test, and then continue to carry out a -hour full-load limit time life test after inspection.
The other prototype will begin testing and verifying various functions. If there are no major problems in the first round of tests on both sides, our first WP-7 engine production line will enter trial production of the first batch of finalized models, with a monthly production capacity of 20 units temporarily planned.

In the current Dawn Research Institute, the production lines for research, pilot production and preliminary production are all concentrated in one place, facilitating the formation of a closed-loop ecosystem integrating research, testing, verification and production. After the product maturity catalysis is completed, the production line and production process design drawings will be standardized and handed over to the real factory for production.

Just like now, between the Aviation Power Research Institute under the Liming Research Institute and Liming Power Co., Ltd., the Aviation Power Research Institute has a complete chain from design to production, but Liming Power only has a production line!
If 20 engines are produced per month, it means that the maximum monthly production capacity of the new Super 7 fighter jets will be 10.

After all, the Super 7 fighter is a heavy fighter with two jet engines.

"I believe in your capabilities in terms of functions. You have experience in the production and research of the WP-5 engine, so you must have all the functions of the engine. However, the life of the engine is crucial. On the one hand, it affects the total cost of the entire fighter jet's life cycle, and on the other hand, it has a great impact on the combat effectiveness of the Air Force."

"The overhaul period of this engine must be significantly increased from 5 hours for the WP-200 to more than 1000 hours, so that it can meet the requirements of frequent takeoffs and combat operations of future fighter jets."

J79 turbine engine

This is the indicator that Ren Zhong values ​​most.

You should know that the overhaul cycle of an engine has a huge impact on a jet fighter squadron. A flight is about three hours. If it is an engine like the WP-3, it will need an overhaul after about 5 flight trainings. This is not only costly, but also affects the training rhythm of the troops.

60 flights is equivalent to about 3 months of high-intensity flight training.

This means that the engine has to be replaced for maintenance every quarter.

Whether it is the frequency of maintenance work or the quality of the engine itself, Ren Zhong is somewhat worried about the WP-5.

Especially during the fighting on the peninsula, the fighter jets performed remarkably well and were invincible in the air.

However, maintenance is a nightmare for logistics. After several high-intensity battles, the performance of most fighter jets deteriorates very quickly when running at full load!

Even before the 200 hours have passed, a new engine must be replaced and the original engine must be overhauled after being replaced.

In many aspects, this is a design defect of the original WP-5 engine. Even if the processing conditions are better than before, it will not be of much use.

J79 was developed by GE in the United States in the 20s. The first ground test bench test was on June 50, 1954, the first flight test was on May 6, 8, and the 1955-hour final test was completed on December 5, 20. The main indicators are the gas temperature before the turbine is 1955K, the pressure ratio is 12, the thrust-to-weight ratio is 8, the intermediate thrust is 25kN, the fuel consumption rate is 1205 kg/(dN·h), the maximum afterburner thrust is 13.5kN, and the fuel consumption rate is 4.61 kg/(dN·h). Although the thrust-to-weight ratio looks rubbish, with an overhaul cycle of more than 53 hours, this turbojet engine has a stable and reliable performance, and its life cycle is as long as more than 0.87 years. Nearly 80 units have been produced, and it was even used in early F-2 fighters.

Ren Zhong was able to pick up such a treasure, so the money he spent on buying the fighter jet was not wasted.

Of course, for the main world's Dongda, such stuff is completely disdainful. Taihang (WS-10), Emei (WS-12), Tianshan (WS-13), and Huangshan (WS-19) have long formed a full range of advanced turbofan engines with high, medium and low combinations.

But if we go back more than 20 years, around 2000, the J79 engine was still very popular for Dongda.

Taking the long-imported RD-33/93 as an example, the intermediate thrust (maximum thrust without afterburner) is 50kN, the maximum thrust (thrust with afterburner) is 81.4 kN, and the afterburner ratio is 1.628; the intermediate fuel consumption rate is 0.785 kg.(daN.h)ˉ2, and the maximum fuel consumption rate is 2.73 kg·(daN·h)ˉ1. Under the turbofan architecture, the indicators in all aspects are not far from those of J79!
This shows the crudeness of Russian aircraft engines.

With this excellent turbojet engine, the F-370J fighter can reach a ferry range of 600 nautical miles (4 km) when carrying two 1699-gallon and one 3147-gallon auxiliary fuel tanks. When carrying four Sparrow missiles and without auxiliary fuel tanks, its combat range is 981 nautical miles (1817 km).

This range is still quite capable even after 2020 in the main world. The F-16, a third-generation main fighter without an auxiliary fuel tank, has a range of 1825 kilometers, which is comparable to the F-4J.

The ignition experiment and the 72-hour test were both very successful, which made Ren Zhong very satisfied. The technology of the first-generation high-temperature alloys and titanium alloys and other materials purchased from the main world is sufficient to support the development of turbojet engines and early turbofan engines according to the current development situation. However, the detailed process technology of carbon fiber and the second-generation high-temperature alloys is not so easy to obtain.

Early carbon fiber could still be purchased from fishing rod factories, but the technology after T500 can be purchased by anyone with money.

However, these things are already far ahead of the Bright Sword world, and Ren Zhong is not in a hurry to get them all in one go. After the first generation, he will invest in research in both the main world and the Bright Sword world. Looking at the technological path ahead, which is obviously much faster than a blind man groping in the dark.

Aviation engines were originally a pain point for Dongda in the main world. Thanks to Ren Zhong's purchases, Dongda in the world of Bright Sword quickly caught up with the world and was the first to produce the J79, a leader in turbojet.

Once the turbojet engine technology is broken through, there will be only a few problems left for the simulation of the F-4 fighter. For the avionics part, even if the radar on the J-5A is transplanted, it is much higher than the level of radar in this world!

With the powerful power of twin engines, a long range of nearly 2000 kilometers, and 9 hanging points for carrying more than 7 tons of weapons, this Super 7 fighter is completely ahead of all current fighters and is unique.

F-4 Phantom

Of course, the world's leading position would not last too long. The technology and talent reserves accumulated by the Rogue Eagles during World War II also made them unparalleled in aviation competitiveness. Even without the impact of Ren Zhong's J-5A, the F-4 fighter would have started designing the next year (1956), achieved test flight two years later, and entered service with the Navy in 2!

For this world, this fighter will have powerful combat capabilities for 30 years.

Of course, now with Ren Zhong as the king of rolls, its lifespan may be much shorter.

This is true whether it is on the Dongda side or the Rogue Eagles side.

So even Ren Zhong doesn’t know how far Super 7 will eventually go.

According to the plan, the new fighter will be completed after the J79-based WP-7 aircraft engine goes into mass production.

According to previous plans, this new fighter should be a J-7 model, but because its combat capability far exceeded the level of the J-7 that Ren Zhong was familiar with, Ren Zhong was a little hesitant.

The test flight of the Super-4 is just around the corner. In fact, the full-size Super- was completed earlier than the engine, and a total of four aircraft were produced in the first batch. One was used in a wind tunnel and for some destructive extreme tests, and the other three will be used as test flight aircraft to verify the performance and manufacturing quality of this new fighter in the long term.

After watching the physical test of the new WP7 engine, Ren Zhong felt much more at ease.

With this aircraft engine, even if there is no new progress in the next 20 years, there will be a guarantee for the Air Force fighter jets.

You should know that this engine is not only suitable for the F-4 fighter. According to the Rogue Eagle plan, there is also an F-4 single-engine fighter that can be matched with the F-104 fighter.

F-104 Starfighter

However, this fighter jet was extremely ugly in appearance, and no fighter jet of this shape has appeared in the market since then. I guess the Rogue Eagle pilot was also moved to tears by the ugliness of this design.

Seeing such a failed sample, Ren Zhong would certainly not repeat the same mistake and fall into the trap for Rogue Eagle in advance.

After searching and comparing in the main world, Ren Zhong chose a new product, the Mountain Eagle light fighter, which is simpler but has high combat effectiveness and cost-effectiveness.

This light fighter, which was derived from a trainer aircraft, may be a bit outdated for use in fighter jets in the 50st century of the main world, but in the late 60s and s of the Bright Sword world, it was also an absolutely advanced fighter jet.

Mountain Eagle trainer/fighter (FTC2000G)

Judging from the appearance alone, the Mountain Eagle fighter looks far better than the Phantom, but in terms of technical level, except for the use of some new technologies of the 4st century in avionics, it may not be stronger than the F- in other aspects.

For example, in terms of engines, the Mountain Eagle fighter (FTC2000G export model) uses the turbojet 13F.

WP13F推力的4315daN，加力推力6236daN，在主世界从1984年开始研制，1992年4月通过了300h设计定型国家鉴定试车。但是大修的首翻期300h，总寿命900h。这个指标比起J79来说差了不是一点半点。

Therefore, using this turbojet 13F engine to propel light fighters feels that the thrust is still a little weak, especially it is not conducive to increasing the weapon load and enhancing combat effectiveness. After replacing it with the new turbojet 79 based on J7, on the one hand, the performance will be improved for self-use, and on the other hand, the competitiveness will also increase when it is sold as foreign military aid.

Due to its two-seat design, this fighter is also suitable as a trainer aircraft. Compared with the J-5A, it has made great progress in both power and take-off weight. The maximum range can reach 2400 kilometers, the maximum flight time is 3 hours, the maximum mount weight can reach 3 tons, the maximum take-off weight is 11 tons, and it has a total of 7 weapon attachment points, which can carry rockets, aerial bombs, air-to-air combat bombs, guided bombs and various types of pods.

In this world where propeller fighters are still the main fighters, this configuration can almost be said to be the best!
Of course, this FTC2000G light fighter is more difficult to build than the Super Seven based on the F-4, because Ren Zhong cannot get the detailed parts dimensions of this fighter. Unlike the F-4, he can have a real aircraft to study and measure in all aspects, which means that the design process is completely eliminated.

But it is impossible to get the real FTC2000G.

Even if this model is exported briskly, Ren Zhong might be able to buy one if he uses his connections in the black West African country. However, this is one of the newest main combat equipment in the main world. If a company in the black West African country has two more fighter jets of unknown types, it may cause tension in the regional situation.

After all, a powerful weapon like a fighter jet is sacred to those places where they have not yet fully eaten their fill.

Even if Ren Zhong dared to buy it back, he would probably not be able to escape the consequences of being snatched away by the locals.

For the black uncles, there is no such thing as Cigna. Whoever is stronger gets it and it’s yours.

In this case, the design of such a fighter must start from scratch, starting with aerodynamics, and be verified bit by bit in the wind tunnel.

Since the general appearance and various aspects of the structure had been explained, after completing the manufacturing of the F-4, Ren Zhong did not believe that the team was still unable to redesign and produce the FTC2000G fighter.

Combined with the extremely powerful power supply of the new turbojet 7, the structure can be appropriately enlarged to increase the weapon load to about 4 tons. This will be used as a self-use model, while the export model will be limited to 3 tons of load. This can be said to be making the best use of everything.

It is impossible for Ren Zhong to design a new fighter jet for export entirely on his own.

Of course, before exporting this light fighter, the J-5A was the real main export model. After all, the manufacturing technology of that fighter is more mature, the cost is lower, and the combat effectiveness is closer to the current world of Bright Sword. Only after the J-5A can no longer sweep the world, will Ren Zhong consider using the new FTC2000G light fighter to re-enrich the national teams of the vast third world countries in this new world.

During the test, Ren Zhong's memory of inspiration was triggered, and he began to look for a substitute for the aviation design. After traveling through the ocean of information in the main world, he successfully selected the FTC2000G, because after leaving aside the avionics, this model is most similar to Ren Zhong's new idea, but the design of this fighter is not easier to make than the F-4, so the process design engineers may have to work overtime. (End of this chapter)