Outside the walls of the Huangtianba test site, in addition to Huang Mingyuan's military enthusiasts, there are many people, including ordinary military fans, passers-by watching the excitement, and even young mothers who take their children to see the plane. By Huang Mingyuan's side, a man wearing a big red jacket and holding a telescope bigger than her red little face was looking at the X20 on the tarmac curiously, and then asked his mother in a milky voice: "Mom, why is the head of the Naga plane pointed, I can't even see the pilot uncle." ”

The little girl asked about the streamlined cockpit of the X20, Xia Yu in the cockpit could only see most of the helmet from the outside, unlike the drop-shaped cockpit, where you could see the position above the shoulder. The little girl's mother just took her to see the plane, where do you know why the cockpit of the X20 is different from other planes, and when she was worried about not knowing how to explain, Huang Mingyuan, who heard the little girl's question, turned his head and took the initiative to explain to the little girl what advantages this streamlined cockpit has over the drop-shaped cockpit.

However, Huang Mingyuan, who was spitting like a river, didn't notice how lewd and his expression was, not that Huang Mingyuan had any evil thoughts, but when he felt that the J-20, which was already very strong in his heart, actually had such a bold change, I really don't know what kind of state this aircraft will change in the future.

Therefore, Huang Mingyuan was fantasizing about the number of X20 while talking, and the expression on his face was naturally not much better, this strange uncle's appearance scared the little girl who kept shrinking behind her mother, for fear of being abducted by the strange Shu Huang, and the little girl's mother also felt that the person in front of her was probably not very normal, and when she saw Huang Mingyuan talking more and more, she quickly thanked Huang Mingyuan and ran away directly with her daughter.

Huang Mingyuan didn't feel anything strange all the time, after the mother and daughter left, he turned his attention to the tarmac again, but because of the sea kan just now, it attracted the attention of other enthusiasts around him.

Enthusiasts are like this, once they find a common topic, they will immediately be able to argue with old friends who have known each other for many years, the arguments that should be debated, the discussions that should be discussed, will not be like ordinary friends who have just met, many scruples when speaking, just like now, when one of them heard Huang Mingyuan say that the streamlined cockpit is very advantageous over the drop-shaped cockpit, he immediately jumped out and said: "Although the advantages of this streamlined cockpit in terms of aerodynamics are incomparable to the drop-shaped cockpit, the disadvantages are also obvious, If you look at the shape of the cockpit canopy and the position of the pilot's head, it is obvious that the field of view is extremely limited, so that it seems that the plane coming from the direction of eight o'clock is not visible. ”

When Huang Mingyuan heard this, he didn't deny it, nodded and said: "So this improved model must be the same as the F35, the pilot must have a display helmet, so that there is no dead angle around the body 360 degrees, and it doesn't matter if the cockpit vision is narrowed." ”

"But what if in an air battle, the distributed optoelectronic aperture system happens to be destroyed?" The enthusiast who raised the objection was probably a conservative, shook his head and said: "In this way, the pilot is simply losing all the vision outside the front, if he is bitten in the back hemisphere at this time, isn't there no way at all?" ”

"If you are hit in modern air combat, it is basically equivalent to being shot down, but if you are injured, do you think it is possible?" Another person interjected: "Now most of the missiles are off-pole warheads, and if they hit, they can directly cut off the plane, and even if the damaged plane does not crash, it will definitely lose the ability to fight in the air, and even if it does not lose its vision at this time, the consequences will be the same." ”

"But nothing is absolute." A conservative enthusiast said: "I think the improved model of this J-20 is too radical in terms of cockpit design alone, even if it is the same as the F35 and only greatly reduces the rearview vision, which is like this, the rearview vision is not at all, right?" ”

Huang Mingyuan shook his head and was about to continue arguing a few words, when another person suddenly shouted: "This is not the J-20B, it's the X20!" ”

“X20？！” Huang Mingyuan and others were stunned when they heard this, immediately stopped arguing, picked up the telescope in their hands and looked under the nose of the machine, although they couldn't see it clearly, but the number was indeed only X20 three words, and it was not like when the J-20 prototype came out, there were four or five technical verification machines alone, and there were several prototypes, so the number was pushed online from 2000, and this X20 was really very strange, just from the number, it was impossible to know how many models this aircraft was, and it was not clear where it came from. If it weren't for the fact that the shape was basically born out of the J-20A, I'm afraid no one would know what this so-called X20 is.

"It's really an X20." Huang Mingyuan shouted: "And the length of the plane seems to be shorter, and the actuator seems to be smaller, right?" ”

The actuator is the driving device that controls all kinds of control surfaces and other moving parts on the aircraft, which is essentially a hydraulic driving device. The airbrakes, flaps, ailerons, landing gear, and other parts of the aircraft that need to move are realized by the movement of the actuator. For example, there are four protruding things under the wing of the J-20, that is, the actuator that drives the flaps and ailerons respectively, without these things, the wing of the aircraft is even more uncontrollable.

"I don't see it anymore." The person next to him shook his head and said, "But the pelvic fin feels bigger?" It already has an impact on the stealth effect, and if it is increased, won't the RCS on the side also be bigger? ”

Huang Mingyuan and a few people actually don't know that the reason why the X20's pelvic fin has become larger is the choice made by Xia Yu in order to pursue maneuverability and stability, and Xia Yu also chose local plasma stealth technology plus the design of spraying translucent materials and deflection shape, just the pelvic fin, even if the area of the pelvic fin is increased, the stealth effect is still okay.

After the ground test was completed, Xia Yu controlled the X20 to taxi to the runway, the original research and development of a new aircraft, when it first went to the runway, in fact, it would not take off to fly, just do the runway taxi test, but because the X20 is based on the improvement of the J-20, plus it is not a regular national project, so Xia Yu decided to take off directly for testing.

Push down the throttle valve, X20's two WS15 began to provide thrust for the aircraft, Xia Yu now has to test the take-off distance of the taxi without afterburner, so Xia Yu did not open the afterburner, but even so, after just more than two hundred meters, X20 still lifted the nose of the aircraft smoothly, and then lifted into the air.

didn't do any drastic action, Xia Yu just controlled the X20 around a small corner, and then tried all the aerodynamic surfaces, and after there was no problem, Xia Yu began to climb, ready to take some altitude to test the single-engine flight.

"Tower, this is X20, ready for a high-altitude single-engine test." After climbing to 11,000 meters, Xia Yu said, "Request approval." ”

"The high-altitude single-engine test request is approved, and you can start at any time."

With permission, Xia Yu first pushed the throttle valve of engine No. 2 to the position of the IDLE, that is, the minimum throttle, and flew for a period of time to obtain a number of jù, and then turned off the engine, flew for a while, and then restarted engine No. 2 and replaced it with engine No. 1 to do the program again, which completed a test task today.

It is worth mentioning that the test of the helmet display system is also being carried out simultaneously, with the help of the distributed photoelectric aperture system, Xia Yu can see any position of the aircraft at will, including the wings and under the belly and the tail of the aircraft, there is no dead angle at all, and the high-definition picture makes Xia Yu feel as if he has seen it with his own eyes, and the effect is very good.

During this period, Xia Yu also tried the effect of the helmet's aiming device, and the capture ability of the digital array radar also made Xia Yu very satisfied, if it wasn't for fear of causing an accident, Xia Yu even had the idea of trying the electronic jamming ground radar, in short, the first flight of X20 still made Xia Yu feel very satisfied.

20 minutes after the first flight, Xia Yu controlled the X20 to land on the runway very lightly to complete today's test, but Xia Yu, who was ready to continue the test, did not know that the Internet had become a mess because of his X20.