I send courier to heaven

Chapter 265 Sorry Everyone

"Okay, okay, give it! What do you want? I can give it to you!" The old man from the Ministry of Commerce waved his hand, expressing that he had surrendered, and now let Lin Tian yell at will.

"Uh, I heard that the traitor 20 you have recently studied has started flying?" Lin Tian looked at the old man in the Ministry of Commerce and rubbed his hands.

"What do you want, kid? We can't sell this to you anyway. We can't sell this kind of national strategic weapon anyway. Don't even think about it!"

"The J-20 is a fifth-generation stealth fighter developed by AVIC Chengdu Aircraft Industry Group Corporation with high stealth, high situational awareness, and high maneuverability.

The J-20 adopts a canard aerodynamic layout with a single seat and two engines, full-moving double vertical tails, DSI bulging air intakes, and upper reverse canard wings with pointed arch edges.The head and fuselage are diamond-shaped, the vertical tail is tilted outward, the landing gear door is designed with sawtooth edges, and the fuselage is painted in bright silver gray (the prototype is dark green).The side bomb bay adopts an innovative structure, which can pre-close the missile launching rack in the magazine, and deploy it to the outside of the fuselage when launching. It is also equipped with PL-20 and PL-15 air-to-air missiles tailored for the J-21.

歼-20是用于接替歼-10、歼-11等机型的中国第五代战斗机，于1997年美国第五代战斗机F22猛禽首飞的同年正式立项，首架技术工程验证机于2009年制造成功，并于2011年1月11日在成都黄田坝军用机场实现首飞。2016年11月1日，歼-20参加珠海航展并首次对外进行双机飞行展示。 2017年3月9日，中央电视台报道第五代战斗机歼-20已正式进入空军序列。2018年2月9日，歼-20开始列装空军作战部队。”

"I know all the things you said. It's just that what I want is not its weapon system. I want to study the spacecraft here, and I want to learn from your flight protection equipment and system." Lin Tian said.

"Then this one is simple, I can give you a public information." The old man from the Ministry of Commerce took out his mobile phone, and after a long period of contact, he handed Lin Tian a detailed information.

The canards and twin vertical tails of the J-20 are fully movable.Among the fifth-generation fighter jets known abroad, only the Su-57 has a full-moving vertical tail, and the F-22 and F-35 are both conventional fixed vertical tails and movable rudder surfaces.

The J-20 movable side strip is located between the canard and the wing.The side strips of the J-20 are very small and narrow, behind the canards.The side bars can be controlled to sag, and the movable side bars can strengthen the vortex lift and control the direction of the vortex.

The full-motion vertical tail and movable edge technology adopted by the J-20 all show the skill of Chinese aviation designers and the progress and accumulation of Chinese aviation technology over the years.The J-20 also adopts advanced technologies such as distributed integrated optoelectronic system and active phased array radar.

As a stealth heavy fighter, the J-20's unique "lifting body, side wing, and canard" layout in the world makes the aircraft not only have good stealth, but also have strong supersonic and maneuvering flight capabilities.Yang Wei believes that since we have the strongest equipment, we must use this equipment in the most critical places in the actual combat process and play a pivotal role.

The J-20 adopts an adjustable DSI (supersonic without boundary layer partition) air intake, and uses a three-dimensional complex curved convex surface (bulge-shaped, used for compressed airflow) to cut the boundary layer in the air intake head-on, Then use the pressure gradient to push to the two corners of the air inlet to release.

Compared with the CARET inlet of the F22, the DSI inlet of the J-20 has the following advantages: The boundary layer isolation device of the CARET of the F-22 is cancelled.The DSI bulge of the J-20 cleverly discharges the boundary layer from above and below the air intake, eliminating the need for this heavy and complicated device, reducing weight and complexity.

At least not worse than F-22's CARET in terms of supersonic total pressure recovery, probably better. [30]
Provides more airflow for smooth engine operation than CARET at sub/transonic speeds.Considering that the DSI of the J-20 is a new generation of DSI developed after accumulating a lot of experience of the Xiaolong DSI, I think the J-20 DSI will inherit this advantage of the Xiaolong DSI.

A distinctive feature of the J-20 is the two vents on the side of the air intake, which are designed in a hexagonal shape and covered with mesh for stealth.The common saying on the Internet is that the vents of the fuel/air cooler (ACFC/heat exchanger) (the front intake and the rear exhaust) are part of the aircraft thermal management system (TMS). Why is the J20 installed with such a "huge" vent?This is because the J20 is equipped with a high-power active phased array radar (AESA), which generates a substantial increase in heat.In order to solve the heat dissipation problem, the J20 adopts a new generation of liquid cooling system according to research and judgment, which is different from the air cooling of the avionics equipment of the previous generation of fighter jets.The system is divided into front and rear circuits and uses special coolant. The coolant first flows through the front circuit to take out the heat from radar and other avionics equipment, and then enters the rear circuit and flows through the fuel tank to transfer the heat to the fuel, because the latter has Greater heat capacity.Finally, the heated fuel passes the heat out of the machine through the fuel/air cooler.This liquid cooling method has been adopted by F22 and F35, and it is one of the standard configurations of the international standard fifth-generation aircraft.However, the heat dissipation exhaust port of J20 ACFC is located outside the intake duct, and as an infrared radiation source, it is easier to be detected from the side below.Compared with the F22 and F35, the cooling outlets are on the back and facing upwards, which looks more hidden.

尹卓先生正面证实歼-20采用的就是国产发动机，并且基本满足歼20的格斗需求。而涡扇-15正在研制中，等涡扇-15服役后，将更明显提升歼-20战斗机的性能。并表示，歼-20已经交付部队4、5个月了。

Like the Su-35 fighter jet, the J-20 also adopts the integrated control system of flying fire and pushing.

The integration of Feihuopu integrates flight control, firepower control, and engine control in software to maximize the power of 1+1+1>3.The flight control is in charge of the speed, altitude and attitude of the aircraft, the fire control is responsible for the firing conditions of the weapons, and the engine control is responsible for providing sufficient thrust.Traditionally, the flight control is dominant. Only when the aircraft is maneuvered to an appropriate launch position can the weapon be launched effectively, and the launch control is only the power guarantee of the flight control, according to the subordinate position.After the integration of Feihuotu, fire control may become dominant at a specific time. After the pilot specifies the target position, Feihuotu will work together to transfer the aircraft to the optimal launch position as soon as possible, and automatically launch the weapon at the optimal time.

What concerned Lin Tian the most was the cockpit system in the car.

The J-20 cockpit is equipped with two multi-functional large-screen displays connected together. This layout has been used abroad since the previous F-35. The size of a single screen should be about 12 inches, and there is no connecting frame between the two displays. , which can be used to merge and display larger images.

Touch-based voice control

The main screen on the J-20 can be controlled and adjusted through sound, which means that the aircraft can be controlled without using hand movements.

The instrument panel of the J-20 uses a large panoramic multi-function display (MFDS) with a size of 8×20 inches. As of 2014, it is the largest fighter display. In fact, it is composed of two 8×10 inch projections side by side The display consists of a resolution of 1280×1024.The two displays are completely backups of each other.When one fails, all functions are available on the other display. MFDS will display sensor, weapon and aircraft status data, as well as battlefield environment, tactical and security information.The large-scale tactical horizontal situation can be displayed in full screen, or it can be divided into several small windows on the plane to display different information respectively.

Two methods are used to control the system functions: one is the touch screen method; the other is realized through various switches and potentiometer knobs set on the steering column and throttle lever (HOTAS).The two monitors are respectively provided by two processors to process the original information. MFDS uses a miniature active-matrix liquid crystal display (LCD) as the imaging source.The projection system for each screen is illuminated by 3 arc lamps respectively.

The J-20's helmet-mounted display system (HMDS) will replace the traditional head-up display (HUD), which not only saves costs, but also significantly reduces the weight of the system. The HMDS system is a combination of an electro-optical system and a pilot's head position tracking device. It will display key flight status data, mission information, threat and safety status information for the pilot. At the same time, the system can also guide the pilot to airborne weapons and sensors (such as radar and EOTS) to point to areas of concern; or to issue visual cues telling the pilot where to focus.

For the control system, the J-20 adopts an advanced light transmission control system.The fly-by-light control system is developed on the fly-by-wire control system, and it is also the development trend of the latter.The Achilles' heel of the fly-by-wire system is that it is susceptible to lightning, electromagnetic interference and nuclear radiation.The performance of modern aircraft continues to improve, and electronic equipment is becoming more and more complex, which will inevitably lead to an increase in the amount of cables and complexity of line layout, which will increase the interference between lines and affect the normal operation of the fly-by-wire control system.The fundamental way to solve this problem is to use the light transmission control system.The optical transmission control system uses light instead of electricity as the transmission carrier, uses optical fiber instead of cables as the transmission medium, and transmits in the form of optical signals, which makes the optical transmission control system have many advantages.

Radar photoelectric
According to information from domestic radar scientific research institutes, the J-20 benefits from sufficient head space. The AESA radar has as many as 2000 to 2200 T/R components, and its transmission power is 24 kilowatts, the largest in the world!It is fully guaranteed to find its trace first outside the detection range of the F22 fighter. AESA active phased array radar has a radar detection range of 200 kilometers, and can track 30 targets at the same time, and can attack 4-6 of them.

The equipment of the Electro-Optical Distributed Aperture Sensor System (EODAS) gives the J-20 a greater tactical advantage. The J-20 can still maintain the ability to grasp the air situation around the fighter without turning on the radar, thereby improving the combat effectiveness of the fighter. and survivability.In particular, it can approach the target from the side with the support of the external information system, and then launch a sudden attack, and effectively detect and identify the approaching air target to prevent the opponent from making a surprise attack.

The J-20 will further enhance the effect of pressurized breathing, and one of the key measures is to be equipped with a bladder anti-G vest; after increasing the resistance pressure by applying pressure outside the chest, the oxygen pressure the pilot bears when breathing can be significantly improved.The structure of the new anti-gravity vest is very likely to be similar to the CSU-22/P vest equipped with the F-17. It adopts a combination structure of a front opening that is easy to put on and take off, double chest airbags and a small airbag behind the neck.

　I know it's wrong to do this, so I won't write this book until I finish writing this month. It will take three days to finish the preparation. Let's start and finish.

　　
　
(End of this chapter)