Traveling through the sword to engage in military industry.

Both the Y-6 and Y-8 propeller passenger aircraft are still based on the design architecture of the early propeller era. Although there is still a lot of room for optimization and improvement, as a new type of passenger aircraft, the foundation is obviously not enough, and the shadow of plagiarism is too obvious.

Therefore, in terms of the future development direction of these two passenger aircraft, Ren Zhong will not regard them as the starting point of the next generation of passenger aircraft. Instead, after the turbofan engine is developed, he plans to directly aim at the development direction of modern passenger aircraft and develop passenger aircraft with turbofan engines in one step!

Let's skip directly to the world's current mainstream turbojet engine passenger aircraft, such as the passenger aircraft models being developed by Boeing and Douglas.

Although the turbojet engine has reached the world's advanced level due to Ren Zhong's purchase, it is only on par with the world's level and has not yet surpassed it. Now with the turbofan engine, this is the beginning of catching up. In the turbofan era, Ren Zhong no longer has many opportunities to purchase in the main world. The engine blueprints he can buy are only ancient varieties such as Spey.

If you go further down, you may be able to buy some actual engines, but there is absolutely no chance of getting the design drawings.

Therefore, from the perspective of the heavy responsibility, he must let the Aviation Engine Research Center invest its main research and development efforts on turbofan engines, relying on the foundation of Spey, and continuously iterate and optimize a new generation of medium-thrust or even large-thrust engines. At the same time, based on this core engine, according to the characteristics of civil aviation passenger aircraft, a new type of civil aviation turbofan engine with large bypass should be developed to further reduce fuel consumption.

Of course, at this stage we can only rely on the Spey multi-purpose aircraft to support the sky for the new generation of aircraft.

The first priority is to complete a truly new passenger aircraft.

If you ask Ren Zhong to design a passenger aircraft by himself, it is impossible. You can't buy it even with money. Fortunately, in this world, besides McDonnell Douglas, Boeing and Airbus, there is also a forgotten loser, BAC, which was born at the wrong time!

Judging from the timeline, BAC has not yet been born at this stage, and it is still the era of its predecessor, Hunting Aircraft Company.

In the main world, the BAC 1-11 plan was originally proposed by Hunting Aircraft Company. The initial design had a passenger capacity of 100 people, and the aircraft model was named Hunting 107 according to the company's name.

Hunter Aircraft merged with Vickers-Armstrong to form BAC in 1960, and the program was terminated during the integration process. After the integration of BAC was completed, the program was revived in 1961 and renamed BAC 1-11.

从设计来看，BAC 1-11的两台发动机置于机身尾部两侧，采用T型尾翼，机翼后掠角20度。BAC 1-11各型的载客量89人-119人。由于整合后的BAC有了当局资助，这次进展顺利，首架BAC 1-11于1963年8月20日首飞，并在1965年完成了各项取证投入服务。

However, precisely because it was born seven or eight years later, after the BAC came out, its customers were limited to the local area, and the production volume of the first model was only 58 aircraft, which was simply insignificant compared to the sales of hundreds of aircraft by Boeing and Douglas.

As a result, the amortization of R&D expenses was seriously insufficient, and the cost advantage of the aircraft could not be reflected through the expansion of scale. In addition, the aviation industry deliberately suppressed the Rogue Eagle, and BAC's operation has been very difficult. Without sales scale, the speed of aircraft model replacement could not keep up with the development of the times. After struggling for more than 20 years, only about 150 aircraft were sold, and finally the production line was closed in the 1980s and withdrew from the passenger aircraft production market.

Although the process and the outcome were quite tragic, after some research, Ren Zhong found that it was not because the product was not good. On the contrary, as a twin-engine passenger aircraft, the BAC1-11 aircraft had good competitiveness in the regional market. Judging from the development model, it could be developed into a main regional passenger aircraft with a range of 2000 to 3000 kilometers and 100-150 seats!
Since this type of aircraft could still be purchased as second-hand ones that were about to be scrapped, Ren Zhong spent several million (without the knife) to purchase a second-hand BAC 1-11-500 that was about to be scrapped, under the pretext of converting it into his own private aircraft in black Africa. During the process, he naturally gathered a group of tool people to completely dismantle and refurbish the structure of the aircraft. By the way, he also carried out a complete survey and mapping, and obtained a complete reverse design sketch set of the fuselage.

In conjunction with the purchase of Spey design materials, this time the actual Spey MK512 engine mapping data and core component physical materials were brought into the world of Bright Sword.

For the Aviation Research Center of Liangjian World, this information is naturally a treasure. The team already has experience in localizing the C-47 and C-54 transport aircraft (passenger aircraft). Except for the aircraft engines of the passenger aircraft, they are already very familiar with the body design and avionics of the rest of the aircraft.

They have accumulated a lot of experience in passenger aircraft design and manufacturing through optimizing and improving the versions of Y-6 and Y-8. Now with the physical design drawings of the BAC1-11 passenger aircraft, not only are they completely easy to understand, but they can also directly assign them to start design verification.

Due to the reliable source and Ren Zhong's confidence in BAC1-11, the design of the new aircraft was quickly finalized under Ren Zhong's intervention. The first model actually adopted a one-to-one restoration of the aircraft. In accordance with Ren Zhong's usual poor naming, the new aircraft was named unremarkably and was directly named CAC-120.

The more popular naming method of the Yun-X series was abandoned. After all, Yun-10 was not a good omen, so this model was named directly according to the number of seats, focusing on simplicity and clarity.

Of course, compared with their competitors, they did not consider the beauty of any model. Boeing named it 7XX, Douglas directly used DC-xx, and the main world had to wait a long time for Airbus to rise. The naming of A3XX also reflected the atmosphere of following the trend!
In terms of the model's specifications and performance indicators, Ren Zhong basically referred to the original indicators of BAC1-11-500, but in terms of seat layout, the initial version is prepared to directly adopt an economical layout of 4 seats and 30 rows, which is basically the same as the original version and does not require adjustment of the weight, making it the solution with the least changes.

If some airlines consider providing differentiated reception to distinguished VIP customers in the future, they can consider reducing 5 rows to 2 rows of 4 seats in first class. Of course, corresponding adjustments will need to be made in terms of luggage weight. If designed in this way, the new layout will be a first-class luxury aircraft with 108 seats.

Since the task was to ensure the integrity and feasibility of the design in terms of the fuselage structure, the Aviation Research Center's choice to convert and produce the first generation of new passenger aircraft remained unchanged.

As the first generation of "independently designed" jet airliner of Dongda, this aircraft skipped the model demonstration and entered the production and manufacturing stage of the prototype after the promotion of Ren Zhong!
The Aviation Research Center has long been accustomed to this kind of Ren Zhong purchasing goods. They are in a fast-paced mode of physical display, and no one has asked where the design came from, because there are too many high-tech products that come directly from Ren Zhong, and everyone has chosen to be numb!
Of course, in order to fully understand this model, necessary aerodynamic research is still needed. The research center plans to first use a wooden model to quickly make a prototype of the fuselage and put it in a wind tunnel to test the stress conditions of various aspects in the air. These data are not ready-made and must be accumulated bit by bit through wind tunnel tests.

Fortunately, since the beginning of aircraft manufacturing, Ren Zhong has guided the Aviation Research Center to gradually develop large wind tunnel groups in Jin and Yan respectively. These infrastructures are indispensable for aerospace, so Ren Zhong did not think about saving them, but invested heavily in developing two wind tunnel groups.

The wind tunnels in Jindi are more suitable for military and aerospace purposes. All military aircraft and rockets are tested in wind tunnels there. As for large transport aircraft and passenger aircraft, these wind tunnels are built in Yanshan, right next to the current Aviation Research Center.

Since there is no concept of the BAC1-11 passenger aircraft in the world of Bright Sword, Ren Zhong is not afraid of a collision with John Bull this time. Instead, he regards this passenger aircraft as a product of completely independent design. Now many things in the design are directly taken out for patent application to consolidate our achievements.

Although nominally this is the first generation of jet airliners independently designed and produced by Dongda, Ren Zhong is completely confident about it because he knows that this model has undergone a lot of testing and production in the main world.

Therefore, in terms of production, Ren Zhong did not rush, but organized the production of prototypes. In order to speed up the verification process, the prototypes were directly planned according to the 4 pre-production models. In this way, many tests can be carried out simultaneously in the future, which greatly reduces the time for multi-machine verification testing.

On the other hand, Ren Zhong began to let the machine tools and material supporting factories directly organize and prepare a complete production line in accordance with the body and structure designed for this passenger aircraft!
This is the rhythm of preparing to work hard and fast, and mass production will start directly once the model is verified to have no problems!
Unlike the development process of modern passenger aircraft in the main world, the early passenger aircraft development was fast-paced. Generally, improvements were made based on the previous transport aircraft or passenger aircraft. In terms of time, it would come out in 2-3 years, and then be put into civilian use after rapid certification. On this basis, it would continue to iterate and update larger and newer models according to market conditions.

Ren Zhong is moving at the same pace, but he's moving even faster!

According to the plan, this passenger aircraft will complete the domestic aviation verification and certification process within two years. It will first be put into use on domestic routes, and then taken to Europe and North America for their airworthiness certification work.

After all, this passenger aircraft is Ren Zhong's trump card to compete with similar models from McDonnell Douglas and Boeing. In the future aviation competition, CAC-120 is the real starting point.

According to Ren Zhong's plan, after CAC-120, the next step is to design a new widened and thickened CAC-150, with a layout of 5 seats and 30 rows; after the Spey turbofan engine iteration to obtain a new model with greater thrust and stronger thrust, the CAC-180 will be further elongated based on the aforementioned model, forming a layout of 5 seats and 36 rows!

Such passenger capacity is comparable to that of the Boeing 4 with four engines and the McDonnell Douglas DC-707, but it is obviously not able to beat them in terms of range. Ren Zhong wants to compete for the market within the 8-kilometer range by cost-effective means. This range can almost perfectly cover the air traffic between most cities in North America and Europe.

In terms of flight speed, the cruise speed of this aircraft is designed to be 850 km/h, and the maximum speed is over 900 km/h. Compared with the Boeing 707, it is slightly inferior in speed, after all, it only has two engines, and the thrust is too far behind the four-engine Boeing 707, which can reach a cruising speed of 707 km/h; but with the same number of seats and much lower fuel consumption, the competitiveness of the CAC-977 series in this medium-range flight is self-evident.

After the Boeing 707 CAC-120 goes into mass production, the aviation transport market within 3000 kilometers will undoubtedly be greatly impacted.

For the European aviation market, the distance between most cities is less than 3000 kilometers, which just matches the current range of the CAC-120.

However, as for the future development direction, on the one hand, the CAC-120 series will be expanded, and on the other hand, we need to consider enlarging the fuel tank to extend the range!

Because in the short term, it may be difficult for Ren Zhong to develop CAC-120 based on CAC-180, but it is not impossible. However, it is much more difficult to independently design and produce large passenger aircraft by changing twin engines into four engines. Don't even think about such a beautiful thing in the short term of three to five years.

Therefore, the only way out is to iterate and optimize the current aircraft models. In the main world, Ren Zhong can completely expand the new aircraft models by relying on the successful A320 series. After all, there is no problem relying on this model for 20 years. Later, according to the customized needs of airlines, it can be flexibly changed to 5 seats and 26 rows of economy class seats, and also provide a business jet model with 4 seats and 3 rows of business class seats, so as to fully cover the needs of medium and short-distance air transportation in the range of 100 to 180 seats.

Only after this will Ren Zhong consider further thickening and eventually changing it to a four-engine intercontinental passenger aircraft.

It is important to have dreams in life. Ren Zhong not only realized his dream of building China into an aviation power, but also began to put it into practice.

Now Dongda's machine tool industry has almost reached the pinnacle of the world. It is obviously not too difficult to assemble the machine tool equipment for a passenger aircraft production line. With the intensive planning, the production and manufacturing links of new passenger aircraft are evolving rapidly.

Most of them have been verified in actual production on the Y-6 and Y-8, so drawing on past experience, the construction of this new passenger aircraft production line was also very fast.

The assembly was even completed nearly a month ahead of schedule!

In this way, the production of four test aircraft can be accelerated!
According to the current schedule, the test flight can be achieved in about a year!
Such a speed would not only sway the great powers to tears, but even the aviation personnel of the University of Tokyo would be surprised.

In the history of Dongda Aviation, no aircraft model has entered the mass production line so quickly. This time is an exception. However, since the production of Mustang P51D, Dongda Aviation Industry has always made exceptions. There are still no problems. Although there are fewer early model verification tests, the quality control of the intermediate production links has always been strict, ensuring that each aircraft has a reliable supply of parts.

Ren Zhong also has strong confidence in the latest CAC-120. (End of this chapter)