Chapter 1971

This is the case now. It took a long time for domestic surveying and mapping to imitate F110 engine. A large number of engine enterprises have thoroughly understood this engine. Therefore, it is natural to improve this engine. The engine is digitally improved, and digital circuits are used to control the engine. All kinds of temperature sensors and air flow sensors on the engine are also digitally transformed. Of course, these are made by the engine factory. Just give Lu Lao their interface data.

Now, looking at the nozzle at the tail, Qin Guan was even more surprised that the vectoring nozzle came out. You know, there must be vectoring nozzle in the power system of the fourth generation aircraft.

"The life of this nozzle is only three hours." it seems that he knows what Qin Guan is thinking, and old Lu explains it.

Vectoring means direction. Vectoring nozzle is a nozzle whose direction can be changed. When the thrust direction of the engine can be changed, it can realize many super maneuvering actions. At the same time, the implementation forms of vectoring nozzle are also different.

For example, the F-22 fighter uses the simplest form of baffle, which can deflect up and down to achieve two-dimensional vector change capability.

Now, the whole vectoring nozzle in front of us is an axisymmetric vectoring nozzle. Based on the ordinary convergence diffusion nozzle, it is internally refitted with an actuator to control the small segment torsion of these scattered pieces, so as to change the direction of the nozzle and the internal air flow will change accordingly.

The technology is very difficult. At the same time, the requirements for materials and processing are very high. In those years, the bear country exported to the white elephant country only had a service life of 15 hours, but what about its own? It's only three hours.

Although the time is short, it is also a zero breakthrough. Now it is three hours, and in the future it can be 30, 300 hours! Even a life span of 300 hours is enough.

"The writing of flight control software is a difficult task," Qin Guan said.

Now the most difficult thing in the research and development of fighter is to write software. In the past, this was not needed at all. In order to develop this fighter, they added more than ten times the number of codes on the basis of the original digital telex software. This system is carried out synchronously with the design of stealth shape, and more research and development forces are invested at the same time.

In addition to themselves, with the help of a large number of comrades in the flight test institute, they finally realized the technical breakthrough of this aircraft.

"Power system, didn't you increase the push?" Qin Guan continued.

After a series of improvements, the overall wind resistance actually increases. Therefore, if the thrust is not increased, the performance of the aircraft will decline, such as the maximum speed. Of course, the update of flight control and the addition of vector engine will make it more maneuverable. There is no doubt about this.

"The original engine is still used now. However, the engine factory is planning to increase the thrust. The latest modification of this turbofan 10 is expected to output 142 kn thrust, and the intermediate thrust is also 90 kN. At that time, it should be able to realize the supersonic cruise capability at Mach 1.1." Lu continued.

Before the successful development of the new generation of high thrust engine, we can only use the existing engine for improvement. In fact, the foundation of F110 engine is good. In the history of parallel time and space, at the end of the 1990s, GE company developed f110-ge-129efe engine on the basis of f110-ge-129ipe and followed the way of low-risk derivation.

The thrust of the engine is increased to 151 kn by using a three-stage integral blade disk fan, a wide chord blade for the first stage fan, a light-weight composite wire wound fan casing, etc., an increase of 17.2%.

Later, the thrust was stabilized at 142 kn for the service life of the engine, which was called f110-ge-132. At the same time, the male cat's improvement plan also liked this engine. By replacing this engine, the supersonic cruise of max. Mach 1.3 was realized.

Ordinary fighters can enter supersonic, but they need to turn on afterburner. After turning on afterburner, the fuel will be consumed at an amazing speed. In this case, even if the fighter's engine can bear it, it will burn all the fuel in a few minutes.

Therefore, when cruising, you must not drive supersonic.

However, when the engine has enough power, such as the thrust without afterburner, it will reach the afterburner level of the previous engine. In this case, supersonic cruise can be carried out.

The F-22 relies on two engines with a thrust to weight ratio of 10 to achieve supersonic cruise. At Mach 1.5, it can fly supersonic for more than 30 minutes, and the power system is absolutely against the sky.

The male cat fighter does not have such strong thrust, but it has the advantage of variable swept wing. When the wing sweeps back, the resistance will be greatly reduced, which is beneficial to supersonic cruise.

If it were not for a series of improvements to increase the resistance, it could achieve Mach 1.3 supersonic cruise, but even now, Mach 1.1 supersonic cruise will be a great progress.

Compared with the straight line, song Lao's duck layout project is not possible, because their fighter resistance is certain. Now, when it comes to this performance, Lu is always proud of it. Once they have this capability, the operation will be easier. They can reach the theater at supersonic speed, which means that the midway time is shorter. Their fighters will certainly be favored by the air force and Navy and become the best fighters of the next generation.

The superior has not yet determined the type selection of the fourth generation aircraft. The current 320 factory is completely developed with self raised funds. If it was not for the support of a large number of arms sales, they would not be able to do it at all. Moreover, it was originally developed on the basis of the J-11, which is equivalent to the change of stealth. The progress is so fast that they can win.

Qin Guan nodded. The engine has always been his weakness, which reflects the details of a big country. He can't come in a hurry. Now he uses the existing engine and continues to upgrade and improve until the latest engine appears. It's the most appropriate to run fast in small steps.

"Come and have a look at our cockpit." Chen Rui took Qin Guan and climbed up the gangway again. For the pilot, the cockpit is the most important link, and Chen Rui is quite satisfied with this cockpit.

Now, when Qin Guan looked up, he immediately sighed: "is this too advanced?"

What did Qin Guan see?