The aerodynamic shape of the F200 was also selected by the R&D team after extensive testing in the wind tunnel by more than a dozen model aircraft, and through simulation calculations, it can save 17% of fuel compared with ordinary passenger aircraft.

The design team not only designed the aerodynamic shape of the fuselage, but also optimized the design of the wing tail and wingtips, especially the wingtips have been greatly changed, changing the previous winglets with winglets to shark fin winglets, which are very special in shape and distinguish them from other airliners at a glance.

This kind of sharklet winglet is Yang Jie asked the technical team to carry out the research and development, the design team after the design of this special winglet through a large number of tests also proved that this winglet significantly reduces aircraft fuel consumption and emissions, and can make the passenger aircraft have better take-off performance, obstacle crossing and climbing ability.

The almost two-metre-tall winglet is made of composite materials, and the R&D team is now preparing to make this device an optional configuration, which can also be used as an option on other series of aircraft.

Of course, the aerodynamic shape of this passenger aircraft has been greatly changed, and the flight control system has to be greatly modified, which is not particularly difficult for the current Zhonghua Fokker Company.

In addition, the F200 also uses a large number of composite materials, which greatly reduces the dead weight of the passenger aircraft itself, so that the empty weight of the passenger aircraft is reduced to a very low level, and the strength and service life of the aircraft itself are greatly improved.

President Vladimir also asked about the performance of the engine when he saw the large bypass turbofan engine hanging from the wing.

When he heard that the maximum thrust of this engine was 30 tons, Vladimir's eyes flashed a few times, and then he looked at the officials next to him and said: "It seems that we are also going to work harder on the big duct than the turbofan engine!"

The two engines on the F200 are an improved version of the Kunlun 500G2, with a thrust of an astonishing 30 tons, which is more than 3 tons higher than the thrust of the second Kunlun 500 engine.

This engine is also a product jointly developed by Yonghan Aviation Technology Company and Rolls-Royce Group of Companies, both of which have taken out their own housekeeping skills and jointly created a very advanced engine product.

This engine Rolls-Royce also uses the technology of Trent 1000 series, and the core engine of the engine is Yonghan Aviation Technology Company, which mainly helps Yonghan Aviation Technology Company to install a swept fan and a wheel hub with a smaller diameter, and also adds a set of non-bleed air device, and the starting mode is changed from the high-pressure shaft rotation driven by the bleed air to the middle pressure shaft driven by the motor, which improves the bypass ratio through the change of the airflow of the core engine.

And by using more one-piece parts, the number of parts is reduced and maintenance costs are reduced.

In fact, Yonghan Aviation Technology Co., Ltd. is also developing such a set of devices, but this set of devices is extremely complex, and there are a lot of problems in the test content of the trial production device, and the technical team has been overcoming these technical problems, and there is still a lot of way to go if it is practical.

Rolls-Royce Group is at the pinnacle of machinery manufacturing, so it has also solved the technical problems in this area.

Yonghan Aviation Technology has also cross-licensed the technology with Rolls-Royce Group of Companies, and obtained the technical authorization of this device, which can now be produced by Yonghan Aviation Technology Company, and Rolls-Royce Group of Companies has also become the engine supplier of this F200 passenger aircraft.

In fact, Da Mao also wants to use the DS-90A turbofan engine produced by his aircraft parts manufacturing group on this passenger aircraft, but the maximum thrust of this engine is only 16 tons, and there is no turbofan engine that can reach the 30-ton thrust level.

Moreover, Damao's engine does not meet the requirements of Zhonghua Fokker in terms of fuel consumption, noise, engine life and reliability, so it also refuses the requirements of Damao, an aviation development group company.

Yang Jie's own Yonghan Aviation Technology Company has achieved the current results after working aero engines for so many years, and has thrown off Da Mao in terms of aero engine technical strength, and he will naturally not use the engines produced by Da Mao again.

Yang Jie and others then boarded the passenger plane and visited the cockpit and passenger compartment.

The avionics equipment of the F200 passenger aircraft naturally uses the most advanced technical equipment, and because the fuselage adopts a "double bubble" section design, the space inside is very large, even the seat width and the distance between the front and rear seats in the economy class cabin are very abundant, ensuring the comfort of passengers.

At the same time, the passenger plane has also canceled the first class position, increased the business class position, and the passenger capacity has been further increased.

Because the concept of first-class cabin was made by Airbus and Boeing, but a large part of Zhonghua Fokker's customers are domestic airlines and overseas low-cost airlines, so the first-class cabin has also been canceled according to the needs of customers, focusing on "cost performance".

Yang Jie also carefully inspected the assembly process of this aircraft, and his own passenger aircraft manufacturing company has done a very good job in these details, and he is still very satisfied with it.

After the completion of the test flight, Da Mao will establish a production line in China for production, but Yang Jie knows that the assembly process of the passenger plane assembled by Da Mao himself is very poor, and the regional airliner that has been saved before has a lot of tolerances, and the seams are not aligned, giving people a very sloppy and rough impression.

The regional airliner that Da Mao saved gave people a very rough impression, and the quality was unreliable, and even the presidential plane in which President Vladimir himself was flying was out of order, which made Mr. President very shameless.

Moreover, Da Mao's own regional airliner also landed on the airport runway and the brake system caught fire, so that Da Mao's domestic passengers did not want to take their own domestic planes.

And Damao's domestic airlines naturally don't want to purchase, even if they purchase a few, they rarely fly there, mainly for Airbus and Boeing and China Fokker models.

The F150 and F100 models produced by Zhonghua Fokker are now sold in Damao and CIS countries, and the aircraft themselves are reliable and equipped with high-speed satellite broadband systems that can make more money for airlines, so the number of aircraft orders in the region is also growing.

Yang Jie is not very optimistic about the establishment of the F200 production line in Damao, if it is to meet the current process standards of China Fokker Company, it will really take a lot of effort.

Yang Jie bought the Dutch Fokker company and then localized it in strict accordance with Fokker standards, which was really hard work in quality control and personnel training.

After this standard system is now established, Zhonghua Fokker Company has also figured out the technology of regional airliners, squeezed into the mainline aircraft market step by step, and now has made a large passenger aircraft, although the speed is very fast, but every step is very stable.

Through the polishing of the project process of many models over the years, the internal standard system of Zhonghua Fokker has been higher than before.