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Although Changkong Lijian refers to the system of cooperation between fighter jets and missiles, without this thing, fighter jets have no combat capability at all.

Air-to-air missiles are mainly used to defend the blue sky of the Republic and fight for air supremacy.

"Sharp Sword..." Du Zhongkun muttered this name.

"After the final assembly is completed, test the effect from the launch rail. Don't let the missile be ready, and there is a problem during launch..." Seeing that the slender air-to-air missile that has been formed in front of you and is the final spray-painting process, Liu Yijiu said to Du Zhongkun.

He clearly remembered that when the Republic was imitating a new air-to-air missile (it seemed to be imitating the R-77), it was when the target was shot that the missile could not successfully leave the launch rail when it was launched and ignited. This caused a large number of people to be very serious. Finally, it was found that the missile had no problem, but it did not match the launch rail on the launch frame...

Liu Yijiu cannot let such a thing happen in the Ninth Courtyard.

"There shouldn't be a problem with this? We use supercomputers to simulate in all situations..." Du Zhongkun's mouth was so open that he could stuff an egg.

The current R-77 has invested a lot of energy to develop based on the Soviets, so there will be no such mistakes.

"Whether there will be any problems, just conduct the test. You can't just not test it just because you think it's simple, and you can't be careless. I don't want any problems to arise, and I hope that my opinion is wrong. However, our missiles are very different from other missile launches..." Liu Yijiu said speechlessly.

He could only tell Du Zhongkun secretly, rather than publicly speaking in front of others. "Be careful, there is no big mistake. We only have less than three months. Once there is a problem in the test on the eve of the shooting, it will affect our final shooting. The matter of presenting a gift to the Republic's birthday will be ruined, and Iran's orders will also have problems."

Du Zhongkun expressed his understanding, and Liu Yijiu did not emphasize too much.

The imitation F-14 has basically the same appearance as the US F-14, except that the avionics system, radar and fire control systems inside have undergone great changes, so the loading of the weapon system naturally requires careful attention. Before, the same appearance and weight of these designed missiles were hung on the belly and hangers of the fighter aircraft, as the same as the weight of these designed missiles, to demonstrate the impact of the weapon system on the performance of the fighter during flight.

What Zhu Houdao and others hope more is to replace it with real missiles to conduct some tests.

After all, there is a big difference between the model and the missile. If it is not completely designed and finalized, it is likely that there will be many differences within the missile.

The center of gravity even shifted.

When flying the opponent's fighter jets in the air, a little weight problem can affect the attitude during flight.

The first batch of six Changkong Sword-11s were quickly assembled and transported directly to Fenghuangshan Airport in Rongcheng by night by using the Zhi-91. After completing some basic tests, the fighter jets were transported to Fenghuangshan Airport for more tests. The airport of Factory 132 is not suitable for long-term fighter jet testing.

"Finally arrived! As long as you hang all this thing up, the panda will be able to perform test flights after loading the weapon system..." Zhu Houdao and others were waiting all the time, seeing the slender air-to-air missile, which is the first medium-range air-to-air missile in China!

"Hook up the Changkong Lijian-01, or mount a part of it first." Liu Yijiu didn't want them to affect the test flight due to the progress of the chart.

Zhu Houdao nodded. It is now July. The climate in Chengdu is hot. The air visibility is very good and it is suitable for the test flight at any time.

"Don't worry, we have to test the cooperation between the missile and the launch rail on the ground first..." Du Zhongkun stopped it, "After all, the launch method of our missile is very different from the previous Pili series."

Seeing the others staring at him with surprise, Du Zhongkun said calmly.

"A small amount of fuel was installed, and except for the model missiles without a warhead, they were also transported."

The only thing that is calm is Liu Yijiu.

The newly designed launch rail is very different from the Pili series.

"According to our new design, it is very different from the Soviet Union's launch method. It is mounted backwards on the bracket and launch rail, and a booster is installed behind it. This is just to remove the missile from the launch frame. The forward-facing booster nozzle is covered by an aerodynamic fairing, which is blown off when the booster is ignited. The booster causes the missile to leave the launch frame and overcomes most of the negative speed generated by the missile on the aircraft due to high-speed flight... Then the main engine ignites, disconnects the connected booster, and the increase in thrust allows the missile to completely overcome the negative speed of the missile when it is launched 30 meters behind the aircraft. The missile seeker locking the target before launch continues to track the target, and the accelerated missile body can make a ±180° turn with the help of the gas rudder deflector during the boost, so that the missile can fly to the target..."

Du Zhongkun explains the new launch principle of missiles.

Whether it is the long-range air-to-air missile's Chang'an Sword-01 or the medium-range air-to-air missile's Chang'an Sword-11, they all adopt this principle, so that the missile can have a larger range of attack angles. All of this is achieved by supporting the missile's advanced electronic systems.

"You haven't conducted the experiment before?"

"To make missiles produce negative speed, they can only be used in flight. Although they are also OK when they are in high-speed wind tunnels, our wind tunnels are always working overload..." Du Zhongkun shook his head and sighed.

Large rockets, various missiles, and various aircraft have to conduct very long-term blow-blown experiments in wind tunnels to obtain more rigorous data and make the design more reasonable.

When designing problems, modifying them will reduce the overall design cost a lot. Otherwise, modifying them during mass production will waste more money.

Du Zhongkun didn't say anything about this situation.

It was decided to start loading the weapon system overnight that night and conduct a model test launch the next day. If it succeeds, the missile will be allowed to conduct multiple test launches in the air as soon as possible.

Missile samples can only be launched when shooting the target.

It is necessary to test the maximum vertical axis angle of the missile on the fighter. The off-axis angle is too small, which will limit the combat range of the missile.

The next morning, the missile model and launch rail were installed on the hanger.

"Clean check the status of the weapon system, and say it when you can, and follow the order to launch..." Before Liu Yu flew onto the plane, Du Zhongkun said to Liu Yufei calmly.

Tested on a ground platform, but it does not mean that the missile can be easily launched on a fighter.

Launching when the fighter jet has not taken off does not mean it can be easily launched in the air.

The test of the fighter loading weapon system is not only about testing the fighter's flight capabilities, but also about testing the cooperation between the entire weapon system and the fire control system.

As the captain of the 132nd Factory Test Flight Brigade, Liu Yufei is the most advanced in terms of flight technology and test flight experience.

He also knows the importance of the next test. Whether the fighter jet is successfully developed depends on the weapon system and avionics system.

The radar system has met the design requirements. After all, during the previous test flights, the civil aviation aircraft in Rongcheng was the best target.

After getting on the plane, I sat in the cockpit of the plane that I had been sitting hundreds of times again. I started the switch according to the process and checked the various systems. After the fighter's status, I reported to the chief engineer through the headset: "The fighter's condition is intact, and the various systems are equipped..."

"Countdown to missile launch, 10,9...1,0!" Without too much nonsense, just start the experiment.

The missile guidance system was restricted, the warhead was cancelled, and there was no fuel. It just allowed the missile to escape from the fighter jet, and the engine did not need to be ignited. On the airport runway, the fighter jets were not ignited, and various systems inside had begun to work under the power of backup.

The moment Liu Yufei heard 0, he was ready, and his thumb placed on the missile launch button on the top of the joystick was pressed instantly.

"Bang!" On the weapon hanging point near the root of the left wing of the fighter, it weighed more than 100 kilograms, nearly four meters long and only about 300 mm in diameter. The booster connected to the last side of the launch rail began to ignite under the power of the aircraft.

The many technicians standing less than five meters couldn't help but tremble when they heard this sound.

This is the most basic and critical link in weapon system testing!

"We must be separated and succeed!" Du Zhongkun and others were praying in their hearts.

However, the fact was not as they imagined. The fairing on the booster behind the missile was blown off, and with a bang, it fell to the back until the fairing hit the hard floor. The sound came into everyone's ears. No one saw the missile model that began to tremble while the booster was working and broke away from the launch frame!

Even with the huge thrust generated by the booster, even the fuselage of the fighter began to tremble.

"Close!" When Zhu Houdao saw this, he was afraid that the booster's thrust would affect the body structure, so he hurriedly issued an order.

Du Zhongkun never expected that this would be the result.

Liu Yijiu may have discovered design problems before.

"This cannot be turned off. The booster is a disposable consumable. During the process of disengagement in the air, after taking the missile off the launch rail, the fuel flow injected backwards must be blown away when the rocket is ignited..."

For a moment, the atmosphere on the scene became a little nervous.
Chapter completed!