Dahan Technology Empire

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Damn it, why did you fly to Japan all of a sudden! Yang Yiwei hurriedly turned the plane and flew back. The Japanese side saw that the other party left with interest and did not take too many actions. After all, many times the plane flew across the border in the sky. It's normal. No one can see the national borders on the ground from a high altitude. As long as the identity and purpose are notified, they can basically travel from the airspace.

Yang Yiwei flew the plane back to his airspace at a speed of up to Mach 30. It was the first time Yang Yiwei flew such a fast plane and excitedly made various flying movements in the air, such as hovering, diving, rolling, and jumping. , Sharp rise and turn... Various movements are operated without pressure, and there is no sense of powerlessness like ordinary fighter planes. After doing some basic movements, Yang Yiwei wanted to do some complex high-altitude movements, and circle at a large allowable slope (circle at a large slope). ), half roll and reverse, jin bucket, half jin bucket flip, slant jin bucket... A set of complicated movements to do the bottom road makes Yang Yiwei even more excited, the performance is so excellent, there is no difficulty at all!

Licking his lips, Yang Yiwei wanted to try some of his legendary moves. These moves can only be seen at the most famous international air show, where several countries with the most powerful aviation capabilities use the best pilots and the best fighter jets. Actions that can be made only after long-term training, these actions have only been made by pilots in the United States, Britain, Russia and France, that is, the 'Pugachev Cobra Maneuver' and 'Tail Rush' , the British Harrier's Bookshelf maneuver, and the Herbst Push Wall maneuver.

Pugachev Cobra maneuver: The plane maintains a speed of about 400KM for level flight. The key is that if the speed exceeds 420KM, the flight trajectory will not be maintained. After the nose is pulled up, the aircraft will climb. Too low will result in insufficient pitching moment. The pilot closed the angle of attack limiter and pulled the lever back to the end. Since the force response of the Su-27 rudder surface was deflected, the force response was delayed, so it had to be held for a short time. After the nose is raised to 60-70 degrees, the horizontal tail effect completely disappears and becomes a part of the drag torque formed by the aerodynamic force and the center of gravity of the aircraft wing. This moment will continue to increase as the angle of attack increases. In turn, the pitching moment of the aircraft is gradually reduced. The pitch-up moment of momentum completely disappears at the maximum elevation angle. The drag torque becomes the restoring torque. level the plane forward. At this time, the pilot's skills will be very important, and he must accurately grasp the throttle to control the flight trajectory of the aircraft. So that the Su-27 can continue to maintain a beautiful flight path. At this time, the pilot's hand holding the stick is basically useless, whether it is a push rod or a pull rod. The aircraft will continue to recover and level off. By its nature it can be characterized as a continuous response to rough drawbar operation at lower speeds. At an angle of attack above 45 degrees, the pilot basically has no control over the aircraft. However, when the aircraft is at an angle of 110 degrees, the aircraft is forced to level off due to the disappearance of the upward pitch moment, but it can expand people's thinking. That is, if enough upward momentum can continue to be obtained at this time. The aircraft will likely continue to pitch back until it completes a complete circular motion, a mission that was finally completed by the Su-37.

In the history of this action, only the Russian super-pilot Pugachev has completed the complete completion of the Su-37 fighter jet, and it is recognized as the Mount Everest action in aviation!

Yang Yiwei calmly adjusted his mentality, opened his eyes, and his subordinates maneuvered swiftly. The entire fighter jet turned into a fast-walking cobra. Suddenly, he found that the target was normal, and he drew a huge aggressive action in the sky. This action is like a huge cobra!

Yeah! Yang Yiwei couldn't help calling out excitedly after finishing the action. He didn't expect that he would have the opportunity to complete the Pugachev Cobra maneuver in his life. It was so exciting.

If this is to be written into history, he should be the first person in China to make the Pugachev Cobra maneuver!

Next, Tail Rush! Yang Yiwei felt as if he had taken a stimulant, without the slightest feeling of fatigue caused by completing difficult flying maneuvers. He quickly adjusted the fighter plane, and the description of Tail Rush in the textbook appeared in his mind.

Tail rush, as the name suggests, means that the tail of the aircraft rushes forward. Of course, no one would think that it is an aircraft that can fly with the tail in the front. The process is: after the aircraft has accumulated enough speed, the nose is pulled up to jump, but at the same time the engine is artificially in the idle state, so that the thrust-to-weight ratio of the aircraft is less than one. Due to the action of the earth's gravity, the speed of the aircraft keeps dropping. When the airspeed of the aircraft reaches zero, the aircraft keeps the nose up and the tail down, and rushes down at the acceleration rate. The dynamic pressure of the aircraft is very small, and the fall is almost under the action of gravity. It seems that the tail is rushing forward, so it is called tail rush. The air intake of the aircraft also becomes autonomous inhalation. Aircraft engines must take some auxiliary measures, such as opening the auxiliary intake valve, continuous ignition of the engine, etc. to prevent flame out. After the aircraft descended a certain distance, the fuselage leaned forward, entered into a dive, and finally recovered in level flight. To prevent tipping, the aircraft must maintain a symmetrical descent without sideslip. Because the tail of the aircraft is in front, the aerodynamic force of the flat tail will change from negative lift to positive lift. This produces a moment that pushes the nose down. Force the aircraft into level flight or dive. The success and beauty of the maneuver depends to a large extent on the performance of the aircraft and the skill and guts of the pilot. That is to say, the aircraft must be sloppy during the gliding process. And the slower the speed when entering, the lower the high point, and the better the viewing effect on the ground.

The Dragon 30 fighter that Yang Yiwei was driving was very fast. In order to prevent accidents caused by excessive speed, he reduced the speed to about Mach 15 for safety reasons. Following a series of dazzling movements, the fighter plane suddenly pulled its head straight up and raised the rocket launched by the Buddha. In general, then the tail is turned off, the engine is turned off, and the aircraft will launch the launch rocket that is playing backwards, as if the tail is flying downward. Seeing the sharp drop in altitude, Yang Yiwei's hands quickly turned into phantoms, the fighter ignited instantly, and the engine turned into a phantom. Normal flight resumed.

Yes! Yang Yiwei clenched his fist tightly. In fact, the most test of the tail thrust action is not the pilot's level, but the test of the fighter's performance, instant shutdown and instant start, Perfect! Very perfect!

If the first two maneuvers are more often used to praise and test the level of fighters and pilots at airshows, the British Harrier's bookshelf maneuver and Herbst's wall-push maneuver are very important in air combat. Actions with actual combat effects can often achieve very obvious advantages and decisive victories in air combat.

The Bookshelf maneuver of the British Harrier. Using the steerable thrust of the Pegasus engine, on the basis that the longitudinal axis of the aircraft basically maintains the original direction, the fuselage can be translated and suddenly raised. When viewed from the front, the aircraft is like drawing a bookshelf in the blue sky. shape. In the Battle of Britain and Ama Island, the British Navy lured the Afghan Air Force into the air combat mode it was good at. Using the special unconventional maneuvering power of the Sea Harrier and the then advanced AIM-9L missiles that could attack head-on, they successfully dominated the air supremacy over the Falklands. Unlike the famous Russian maneuver of maneuvering in the same plane, the maneuvering range of the British aircraft is directly across the vertical or horizontal plane. It is very easy to fall off the opponent to track or lock the opponent. At the same time, when attacking, the head pointing can be easily aimed at the opponent, and the enemy can fire first and take the initiative.

Herbst's wall kick maneuver: After the aircraft enters high-speed flight, the aircraft is pulled to an angle of attack of about 70 degrees (note: controllable state), using vector thrust to change the thrust direction, and at the same time using the corresponding airfoil to control the aircraft Half-roll, quickly turn 180 degrees, then push the stick to reduce the angle of attack to accelerate to the initial high speed. This action overcomes the disadvantages of increasing the overload and requiring a large hovering distance in the past. The whole action is like a swimmer flipping quickly on the wall of the pool, hence the name. Since its maneuvering radius is only 17.5% of the normal circling radius, it greatly improves the agility of the aircraft. It plays a very important role in air combat.

Yang Yiwei silently recited what was written in the textbook in his heart, without a trace of relaxation in his hands, he continued to perform a series of movements, the fighter plane suddenly pulled up vertically in the sky, then immediately panned to the right, then panned to the left, and continued to come and go. After a few pans, Yang Yiwei took a slow breath, calmed down his excitement, and slowly pulled the plane up to 70 degrees, then slammed on the accelerator, accelerated instantly, and then pulled the lever rapidly, the plane was like a swimmer touching the plane. At the edge, a high-altitude carp turned over, and then several carp turned over one after another.

It's so cool! It's so cool! I've been flying all my life, and it's never been so fun today. I've done all the moves that I've never done before, and I've done it several times in a row, and it's more refreshing every time! Yang Yiwei's whole face turned red due to excessive excitement and congestion!

Soon, Yang Yiwei, who had reduced his speed, flew over the airport under the guidance of the ground radar. He reduced his speed to the speed of a normal plane, and repeated the actions he had just done several times in a very coherent manner. Look at the mouth stunned!

Pugachev Cobra maneuver...

Tail Punch

Herbst Push Wall Maneuver

The Bookshelf Maneuver of the British Harrier

Among the people below, there are many people who know the goods, and every action has been recognized by everyone. Others who have heard more or less have heard these legends in books, and the people who know the goods exclaimed loudly, no matter how stupid they are. These moves are awesome!

Unbelievable! Being able to make these moves is not what really surprised me. What I am surprised is that I can make these moves in rapid succession and very coherently in the air. It's incredible, it's incredible! A lieutenant general from the Air Force used three incredible words in a row to express his inner shock.

Soon, the fighter slowly reduced its speed, and finally suspended in the air, slowly lowered its altitude, opened the landing gear, and landed on the ground very smoothly without any slippage.

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