After fifteen hours of negotiation, everyone finally determined the price code for negotiations with the Soviets.

From one pm on the first day, the discussion continued until three in the morning.

Which technologies must be obtained, and those that do not need to be obtained. If they really don’t work, how much money should be paid by the Soviets. After all, even if some technologies are obtained now, it is far more important for China to have money.

Money can lay a solid foundation.

It is far more useful than getting more technology. The Soviets would definitely not give key basic technology.

After the end, Liu Yijiu returned home and went to Zone 1 again without resting for three hours. After the Z-91 modification, he will conduct a test flight again. This time, Liu Yijiu has to guard the side, so even if he has not sowed the seeds in Li Rui's field for a long time, Li Rui was extremely resentful and he did not torture.

For Li Rui, it seems that he has no passion from the past.

This was not the case when facing Situ Xue, and it was not the case before.

If Liu Yijiu hadn't known his physical condition, he would have thought he was too tired and would not take any more.

"Director Liu, are you here?" Zhi-91 will test flights again today. As long as there is no problem, all kinds of test flights will be launched quickly, and three aircraft will be produced in the base at the same time for more experiments, testing the technical parameters and stability of the design.

All night, many people in the entire area did not close their eyes. Even if the final inspection had been completed, they could just let the helicopter fly, and Wang Yueshan and others dared not take it lightly.

They also checked the last question many times.

"The compressor and engine have been replaced this time? Is the screws made of forged stainless steel?" Liu Yijiu has not been here for a while, but asked Liao Zhuojing on the side.

Liao Zhuojing nodded hurriedly.

Whether the helicopter fell directly due to the screw problem is about to be determined.

This also confirms whether Liu Yijiu's judgment on this is correct. It even affects whether their helicopter project can continue quickly. Once a mistake occurs, the attack on the base will not only be the helicopter project, but also many other projects in the base.

It is because many of the technologies used in the many projects in the base have not been fully demonstrated!

"We have been checking many times. Everyone didn't close their eyes all night. We just waited for dawn. As long as there was no problem, our helicopter would fly up! The army's armored regiment will have wings!" Liao Zhuojing looked at the hangar not far away, and there were many staff in military uniforms conducting the final inspection around the helicopter.

"Don't worry, there will be no problem!" Liu Yijiu said softly.

He is comforting Liao Zhuojing and others, isn’t he comforting himself? This is the system of old antiques!

Moreover, this is just a helicopter platform. If the platform has not been developed, how can they install weapons systems on it?

Time passed by in an anxious waiting second by second, and when it came here, it was less than seven o'clock.

It was early in summer, but heavy fog rose in the mountains. It was not until after nine o'clock that the fog dissipated.

This further increased the anxiety of a group of managers and researchers who were waiting nervously.

"Old Huang, you have to keep a relaxed state. Whether our project has achieved initial success depends on your flight this time!" Seeing even the experienced test pilot Huang Pingyang and the co-pilot beside him, Liu Yijiu's heart was even heavier.

This time it was because the time was too short. The helicopter was made by using gold fingers. The entire research team can be said to be doing design and learning.

Failure must not be allowed!

Failure will be a heavy blow to all the research teams in the entire base.

When Huang Pingyang heard Liu Yijiu's words, he let out a long sigh and said he was not nervous. It was fake. During the first test flight, he was not nervous. He flew too many times in the -7. Moreover, the initial flight also made him feel that there was no problem.

But without feeling anything, the helicopter fell out of the air.

"Director Liu, don't worry. I have no problem!" Huang Pingyang said firmly to Liu Yijiu and Liao Zhuojing and others with red eyes.

"Xiao Liu, the heavy fog outside has dispersed. You can prepare to take off and test flight. Look..." Zhanliko has almost become a choreographer now.

"Just follow the original plan and steps, and there is no need to ask for my opinion." Liu Yijiu nodded.

With Zhanliko's actions, the logistical pilots in the base began to clear the yard and pushed the huge helicopter out of the hangar to the outside tarmac. Then another round of inspection was conducted.

At first there was fog outside and the plane was not pushed out.

I am worried that the moisture in the fog will affect the performance of the aircraft. At the beginning, you must be careful.

After the pilots conducted another round of inspections, they signaled that there was no problem. Liao Zhuojing gave Huang Pingyang and the co-pilot beside him an encouraging look. Huang Pingyang took a deep breath and then firmly headed towards the helicopter not far away.

Test pilots, their lives may be sacrificed due to missions at any time.

But Huang Pingyang does not regret it. After all, he likes to challenge, and he has experienced the operation of Zhi-91 once.

The last time he fell from a sky worth dozens of meters, he was not injured, and the plane's fuselage was not very deformed, which has proved the reliability of the structure. As long as he did not fly too high, the problem was not too big.

If you can't die, naturally there is nothing to worry about.

This helicopter, which is much larger than the Z-7, has a much more complex operating system, but is easier to operate. After all, most of the Z-7 technologies come from Z-5 and Z-6, and most of the auxiliary operating systems are mechanical. The Ninth Academy's research on hydraulics has been expanded since 1977, and many of the systems on this are hydraulics.

Save effort.

"Boss, I'm nervous..." The test pilot of the co-pilot was not very experienced. He was originally a straight-5 pilot in the army. He was in his twenties. If he hadn't had some connection with Zhanliko, he wouldn't have turned him.

"What's there to worry about? Just like we usually simulate driving." Huang Pingyang suppressed the tension in his heart and said calmly.

Once you are bitten by a snake, you will be afraid of the rope for ten years.

Moreover, the bottom of the butt is not the old and backward straight-5, but the golden lumps piled up from eight million yuan!

Eight million, the largest denomination value of ten yuan in the Republic, can be piled up like a hill as big as this helicopter.

This is still the price of not having a weapon system installed!

The ground crew commander kept making gestures to signal that the helicopter could be ready to take off.

Huang Pingyang took a deep breath, put on the flight helmet, placed the headset in the appropriate position, put down the goggles, and then gently pressed the engine's ignition button. While monitoring the engine's running status, he quickly turned on the switches of various other devices.

The young co-pilot, who was originally nervous, also began to follow the simulation training operations and started to open a few auxiliary operation buttons. They have been training these actions for half a year. They have become fully familiar with various operations.

"Boom boom boom..." As the roar of the engine sounded, the helicopter's originally hanging blades slowly turned around the hub and began to rotate slowly.

Since it is a twin-rotor coaxial helicopter, in order to prevent the two rotors from interfering, the first one is to rotate the uppermost rotor. Until the rotor has been fully unfolded and a plane rotating circle is formed, the second rotor below rotates rapidly.

"Buzzing..." As the engine's output efficiency continues to improve, the rotor's rotation is getting faster and faster.

Seeing that the indicator lights were already on, there were two computer display screens in front of the operating table that were the same size as a palm, which fed back the status detection data to the above. The parameters were all normal. Huang Pingyang gave a thumbs up to the ground crew commander wearing eye-catching red clothes not far from the front of the helicopter, indicating that he could take off.

"Take off! Pay attention to controlling the flight posture, and take a little bit of movement, take your time!" Liao Zhuojing's hand holding the walkie-talkie was trembling, and finally he plucked up all his strength before he spoke a small sentence.

He had never been so nervous in the last test flight.

After something happened, he was panicked for a long time. The cost of these helicopters was almost the same as that of their original research on Zhi-7 project funds.

If you fall once, you will get rid of millions of them!

Everyone held their breath and saw the helicopter shaking slightly, their hearts were about to stop beating. The last failure made everyone cautious. In order to confirm the problem, the helicopter was hovered at a height of about one meter on the ground after leaving the ground and before flying, so that the rotor would run for a period of time. Even if there was any problem, the last thing would not happen again.

The helicopter hovered staggeringly at a height of one meter from the ground. The two rotors of forward and reverse flaming strong winds, causing the three-way land covered with carbon slag to roll up dust, but no one was frowning because of this.

"You can fly!" Liu Yijiu's heart, which was originally hanging, suddenly breathed a sigh of relief.

"Fly! Simply-91-02!" Liao Zhuojing heard Liu Yijiu's words and almost used all his strength to roar and roared!

"Fly! Simply-91-02!" The others shouted almost in unison!

Huang Pingyang felt that he saw the old men in the dust not far away crying, as if Director Liu, who had always been extremely strong, was also shouting with sobs.

Pull up the joystick, and the helicopter that was originally swaying slightly began to rise up vertically towards the sky quickly... (To be continued.)
Chapter completed!