Siheyuan starts from a better life

Chapter 494, the night before

Jiang Yan is not clear about what happened in Forty-Nine City in Shengjing. He is currently fully cooperating with Mr. Xu to sort out all the information on the Zhan-6 aircraft. With Jiang Yan's participation, the entire data sorting speed has been accelerated. few.

In order to ensure that the data collection is synchronized with the production of aircraft parts, once the data is compiled, it will be sent to the factory for production. Since Jiang Yan has experience in front-line production, Jiang Yan is overall responsible for this aspect of production.

"Why are you worried about tomorrow's flight!" Jiang Yan, who was in the hangar looking at the silver-white war eagle with mixed emotions, heard the voice behind him. When he looked back, he saw that Mr. Xu was also here.

The Zhan 6 War Eagle in the hangar was produced based on the data collected by Jiang Yan and the others from the Mao Xiong Kingdom. The dimensions of all parts produced on the aircraft were strictly produced in accordance with the data, including the metal used in the aircraft. This aircraft The airplane was assembled successfully by Jiang Yan, and it would be really unsafe if he didn't take a look at it.

"Look, how beautiful this War Eagle is. With it guarding our country's blue sky, we can live a stable life. It's just a pity that this is not an aircraft we developed ourselves." Mr. Xu looked at this War Eagle and walked onto it. He went to touch it and spoke a little affectionately.

"There will be a day when we can build our own aircraft." Jiang Yan replied with an extremely certain tone.

The two people stayed in the hangar for a long time. Neither of them spoke, but just watched quietly.

Coming out of the hangar and on the way back to the dormitory, Jiang Yan stopped there, looked at Mr. Xu and said, "Mr. Xu, why don't you use the alloy I produced? I have calculated before that if you use the alloy I produced, this The overall weight of the aircraft is reduced by 20.00% compared to previous aircraft, so that our aircraft can carry more fuel and ammunition, and our aircraft will fly farther and have stronger combat effectiveness."

When Mr. Xu heard Jiang Yan's question, he stopped, looked at Jiang Yan and said, "The research and development of aircraft is a systematic process. Even every part on the aircraft is indispensable. At present, we do not have the ability to develop such an aircraft." For airplanes, the best way is to imitate them first and then develop them, and take one step at a time to understand it thoroughly."

"I have also considered new alloys. You have to know that the aircraft is lighter, which has advantages and disadvantages. It may also cause a series of problems. Even the aerodynamic layout of the aircraft needs to be recalculated."

Jiang Yan understood what Mr. Xu said. It is not easy to design an aircraft, nor is it easy to improve an aircraft. It requires more consideration. It is not just about adding the right things. The aircraft needs to be integrated as a whole. Consider all aspects.

The most important thing in aircraft design is aerodynamic layout, also called aircraft aerodynamic shape.This is the most important thing in aircraft design, ranking first, even more important than the engine.The design principles of this aerodynamic shape are: low resistance, high lift, energy saving, flexibility, stability, balance, wind resistance, strength, etc. If you fail to pass any one of them, your aircraft may be a scrap.

The second is the internal structure, which is equivalent to the skeleton of the aircraft.The aerodynamic shape mainly refers to the shape of the outer surface of the aircraft.

The third is material.Of course, the lighter the aircraft material, the better.At the same time, it must be strong, high strength, high toughness, high fatigue resistance, high weather resistance, cold and heat resistance, etc. you can think of.The aircraft materials are all the highest-tech materials.

The fourth is the aircraft control system.Includes software and hardware controls.Hardware is various mechanical devices and actuators.Such as solenoid valves, vortex rods, sensors, communications, instruments, servos, flaps, engines, etc.Software is a program that automatically controls functions.

Finally there is the engine.Including the various parameters of the engine that must meet the standards and the location where the engine is installed on the fuselage.The installation position of this engine is very particular, and it directly determines the stability of the force on the aircraft when the engine is working.

There are many other items in aircraft subdivision, such as landing gear, fuel tanks, oil circuits, cabin design, etc.Each item is very important and cannot be careless, otherwise it is likely to be an accident. "Currently, our air force is short of aircraft. We can only produce a batch of aircraft for use. Subsequent improvements will be carried out soon." Mr. Xu continued.

"Comrade, don't be anxious, you have to eat your food one bite at a time." After Mr. Xu said this, he patted Jiang Yan on the shoulder.

When Jiang Yan went home at night, lying on the bed, he still couldn't sleep. As if a movie had passed through his mind, scenes began to flash through his mind.

This type of aircraft from the previous country has been thoroughly researched on the Internet, and almost all the confirmations have been found out one by one. Not only did they find out, they also gave corresponding solutions.

Thinking of this, Jiang Yan glanced at Jiang Sirui who was already asleep, got up, and went to the study alone. After gently closing the door, he came to his own space and started searching quickly on the computer. All information about this aircraft.

After calculations and analysis of all the data he had read, Jiang Yan decided to start with the wings of the Magic Zhan-6 aircraft.

In summary, Jiang Yan still feels that when the Zhan-6 III was improved, this improvement is currently the most suitable.

He achieved better supersonic performance by adjusting key parameters of the wing, actually changing the original airfoil design.There is a setback flap on the inside of the trailing edge of the wing, the same as the MiG-17.In addition to the advantages of single-slit flaps, this kind of flap can also increase the wing area when lowered, further improving take-off and landing performance. However, the structure is relatively complex and can only be used in take-off and landing conditions.

Due to the use of large swept wings, reducing the wingspan is equivalent to reducing the wing area behind the center of gravity, causing the focus of the aircraft to move forward and reducing the static stability.Longitudinal control overshoot during aircraft flight is actually a manifestation of reduced static stability - because it causes the aircraft's longitudinal control moment to become smaller, the pilot only needs a small stick displacement to cause the aircraft's pitch attitude to change significantly.

The phenomenon of "floating" occurs because the aircraft's stick force is very light. If the control stick is moved a small amount, the flight status will not change.However, when the control stick moves to a certain position, the flight status will suddenly change and exceed the required status (overshoot).To adjust this overshoot phenomenon, it is generally necessary to move the control column in the opposite direction, but overshoot in the opposite direction will occur.Repeated corrections like this will cause longitudinal instability, which may even become more serious the more corrections occur.

Similarly, there is a solution to this problem, which is to lengthen the rocker arm at the head of the hydraulic booster.Only in this way can the aircraft be better controlled.

However, Jiang Yan's purpose was not that. His ultimate goal was to change the fully automatic leading edge slats and retrograde flaps.

In terms of their effects, fully automatic leading edge slats and retracting flaps are much better than wing blades, and can effectively solve the stall problem caused by wingtips in fighter jets.

Jiang Yan wrote hundreds of pages on the entire conclusion, describing the problems in detail and proposing ways to improve it.At the end of the paper, the "Small War" plan is proposed.

This plan is to design a new fighter jet based on the engine of the Zhan-12 aircraft. In fact, it is a tribute to the former Zhan-[-], a regret in the hearts of many military fans.

(End of this chapter)