Variable sweep wings! This is the pride of every Grumman technician, this technology gives the fighter the best wing aerodynamic characteristics in various airspaces, high and low speeds, and other aircraft, when designed, there are trade-offs, such as F-16, high-speed ability is quite poor, after loading weapons, it is almost impossible to be supersonic, and F-15, focusing on supersonic capabilities, grappling performance below Mach 0.9, but not as good as the dexterous F-16.

It is precisely because of Pakistan's obsession with variable sweep wings that Lehack came to Pakistan to work with them to develop this new stealth modification, for those of them, the Pakistani model is simply tailor-made for them.

And now, a significant step has been made in technology, and the prototype has already begun to fly test! At this moment of celebration by 10,000 people, Lehack still kept his head up.

There is still a technological gap between Pakistan and the United States.

"The fourth-generation aircraft project of the United States plans to use an engine with a thrust-to-weight ratio of more than 10, while our Chogori-1 engine, the thrust-to-weight ratio is still 8, and the flight envelope is even worse, for example, the restart capability at a low altitude of 500 meters is almost incomplete, and the American engine has begun to use thrust vector control, and we still have a long way to go." Lehack said.

Although Pakistan has made great progress, it is still far from the perverted and almost alien technological level of the United States.

Lehag said this, and Asius also nodded, it was precisely because the engine capacity could not be reached, so this variable swept wing technology was come up, in the case of the engine lagging behind. It is still theoretically possible to reach supersonic cruising capabilities.

"At the same time, we can have a hunch that the future sky will be the era of stealth aircraft, and to discover stealth aircraft, it will require more advanced radar. For example, the active electric sweep phased array AESA radar. Lehack continued: "This is also a must-have option for the fourth-generation aircraft of the United States. ”

Now, when the Soviet Union was still using the N001 radar with an upside-down lid, Pakistan had mastered the technology of flat slit radar, which had to be said to be a great progress, in terms of electronic technology, Pakistan had long surpassed the Soviet Union, but unfortunately, in the Western world, this technology has also begun to become obsolete. The sky of the future needs an active phased array radar!

The difference between the flat plate gap and the Calense is only the antenna, the basic principle of the radar is still the same, and the active phased array radar is a new form of radar, each T/R antenna on it is a transmitting and receiving unit, relying on electronic control to scan the direction. There are countless small emitting units, each of which has not much energy. However, the energy gathered is considerable.

Stealth aircraft is not completely stealthy, but the radar reflection area is small, and the active phased array radar. After the suspicious target is detected, all the beams can be mobilized, which increases the transmit power and can be detected at a greater distance.

At this time, the upgraded version of the MiG-25 of the Soviet MiG-31. Phased array radar has been used, but it is not an active phased array radar, it is only a passive model, and the launch is still achieved by a high-power traveling wave tube, even so, the performance of the MiG-31 is quite strong, and it can even be used as a small early warning aircraft to command four ordinary fighters for combat.

"Our own Friendship Shield system is an active phased array radar, right?" "Is it technically difficult to transplant it to a fighter plane? ”

Active phased array radar, Pakistan also has technology, the navy's long-range anti-aircraft missiles, use this kind of radar.

On this basis, how difficult is it to develop an airborne phased array radar? Mhammad, who is not from a technical background, is not very clear.

"It's not a small technical difficulty." "One is the miniaturization of the T/R components, and the other is the data processing performance," Atheus said. ”

The antennas and radar arrays used by the Navy are on the order of several meters by several meters, and the radar used by fighters is less than one-tenth of them, and on such a small plane, thousands of T/R components must be concentrated, like the radar used by the American F-22 program, there are 2,200 such components, and you can imagine how small the volume of each one is.

At the same time, the data processing ability is also very important, to put it simply, phased array radar is equivalent to the combination of countless ultra-small radars, each T/R unit can transmit and receive electromagnetic waves, is a radar, thousands of such units, to accurately calculate the relative position and coherent phase of each unit, but also to calculate the synthetic sidelobe and other data, and also to control the phase shift radian and angle of each phase shifter, in order to complete the scanning of a certain angle. The processing of this data is even more critical, and without the right algorithms, even a supercomputer would have to drown in a sea of data.

The Navy's system, the use of a huge cabinet of computer processing system, put on the aircraft, the computer has to be reduced, these are cutting-edge science and technology, you know, the airborne computer needs a special reinforcement of explosion-resistant chips, civilian chips must not be placed on it, at this time the civilian CPU has entered the Pentium era, the main frequency to hundreds of megabytes marched, and military chips, the main frequency is only a few tens of megabytes, which brings higher requirements to signal processing.

Active Phased Array, Pulse Doppler, Beam Sharpening, Ground Moving Target Display/Tracking, Synthetic Aperture... These functions require complex programming to implement.

Pakistan still has a long way to go! Now this test flight model is only equipped with the previous Pakistan's self-produced flat slot radar, which can only be an excessive product, and the new active phased array radar will be replaced in the later stage, and the scientific research of the Babel Tower High-tech Center is also needed.

Thinking of this, Mhammad was also a little emotional.

"Conning Tower, Conning Tower, Stealth Cat No. 01, has completed the preparations before takeoff, request to take off!" At this moment, the pilot's voice came over the radio, and the plane had completed all its preparations!

"You can take off!" The captain of the test flight team who was in charge of the command at the scene said on the radio.

Everyone's eyes looked over again, only to see that the unique appearance of the fighter, two blazing flames appeared in the tail, pushing the fighter, quickly sliding forward, a few hundred meters later, the front landing gear was raised, and then, the main landing gear behind also lightly left the ground, the whole plane, has flown up!

The first test flight, as long as you can fly, it is considered a success! The scene was bursting with laughter.

"Congratulations on the successful first flight of our fighters! It's a credit to all the tech guys! Mhammad said: "This means that our Pakistan's science and technology have reached the world's advanced level, we must guard against arrogance and rashness, continue to work hard, and strive to finalize this fighter as soon as possible to defend the skies of our South Asia!" ”

The technicians on the scene applauded and paid tribute to the great president, honest technicians who were devoted to scientific research and did not notice the wording of Mhammad: defend the skies of South Asia!

India, as a rogue who invades other countries with blood on both hands, does not deserve to exist!

If you open the history book, you can find out how many countries India has annexed after the founding of the country! The princely states in the south, Kashmir in the west, Sikkim in the east, and southern Tibet in the north are all swallowed by India in one bite!

Among them, being annexed as a sovereign state of Sikkim is the most unacceptable! The exiled king of Sikkim, Wangchuck Tengsin Namgal, sat on the sofa in the Great Hall of the People and looked at the national leaders of China in front of him, feeling extremely warm.

"We in China have always been opposed to the Indian government's illegal invasion of Sikkim, and we support the independence of Sikkim and oppose India's aggression." Prime Minister Hua Xia said.

has been living a life of exile, although you are a royal family, but you don't even have a little royal dignity, in the United States, living like ordinary people, hearing Huaxia's supportive attitude, Wangchuck felt that tears were about to flow.

"All the time, we are hoping to free Sikkim from the invasion of India." "India's invasion was illegal and the people of Sikkim are now living in dire straits," Wangchuck said. ”

"Yes, we know that." Premier Hua Xia continued: "However, independence and freedom come at a price, Your Royal Highness, are you ready? ”

It is impossible to be liberated from the clutches of India without bloodshed and sacrifice. Wangchuck said firmly: "I am willing to pay any price!" As long as your country supports our independence of Sikkim, we are willing to serve Huaxia as the lord as before! We in Sikkim can become a special zone in China! Please Huaxia garrison our troops in the Sikkim SAR and help us maintain the stability of the Sikkim SAR! ”

In fact, long before Sikkim was annexed by India, that is, on June 20, 1974, at that turbulent moment in Sikkim's history, Sikkim's "National Congress Party" proposed a constitutional amendment to the Sikkim Parliament and asked the Parliament to vote no later than 12 noon on the same day to demand that Sikkim join India. Another major party, the "Jatiya Party," adopted another plan: to announce to the people of Sikkim and the international media the "Resolution on Joining China" and the attached "Interim Plan for Administrative Merger" drawn up by the legal experts and patriotic intellectuals of the "Jatiya Party," announcing that it would formally "join the Chinese administrative system" and become an "administrative region" of China. (To be continued.) )