After fifteen hours of negotiation, the price of the negotiations with the Soviets was finally determined.

From one p.m. on the first day, the discussion continued until three a.m.

Which technologies must be obtained, those can be left untaken, and if they really can't be used, how much money should be paid by the Soviets. After all, even if some technologies are available now, they are far less important to China than money.

If you have money, you can lay a good foundation.

Far more useful than getting more technology. The Soviets will certainly not give the key basic technology.

After the end, Liu Yijiu returned home, and without resting for three hours, he went to District 1 again. After the Z-91 modification, another test flight will be carried out. This time, Liu Yijiu had to guard on the side, so even if he hadn't sown seeds in Li Rui's field for a long time, Li Rui was extremely resentful, and he didn't toss anymore.

For Li Rui, it seems that he has lost his former passion.

When facing Situ Xue, it was not like this, and it was not like this before.

If he didn't know his physical condition, Liu Yijiu would have thought that he was too tired and wouldn't lift it.

"Director Liu, are you here?" The Z-91 will be tested again today, as long as there are no problems, all kinds of test flights will be carried out quickly, and three will be produced at the same time in the base for more experiments, testing the technical parameters and stability of the design.

Throughout the night, many people in the entire first district did not close their eyes, even if the final inspection had been done, it was completely possible to let the helicopter fly like this, and Wang Yueshan and the others did not dare to take it lightly.

Last time, they also checked it many times.

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

Liao Zhuojing nodded hurriedly.

Whether it was caused by the problem of the screws caused the helicopter to fall directly will soon be known.

Thus, this also confirms whether Liu Yijiu's judgment on this is correct. It's even about whether their helicopter project can go on quickly. Once there is a mistake, the blow to the base is not only this helicopter project, but even related to many other projects in the base.

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

"It's been checked many times. Everyone didn't close their eyes all night, just waiting for dawn. As long as there are no problems. Our helicopter will fly! The armored regiment of the army will be winged! Liao Zhuojing stood still in the hangar not far from him, and there were many staff members in military uniforms who were doing the final inspection of the huge helicopter 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? It's an antique system!

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

Time. In the anxious waiting, second by second, by the time I got here, it was not yet seven o'clock.

In the summer, it dawned early, but there was a heavy fog in the mountains, and it was not until after nine o'clock that the fog lifted.

This has added to the anxiety of a group of managers and researchers who are nervously waiting.

"Lao Huang, you have to stay relaxed. Whether our project has achieved initial success depends on your flight! Seeing that even the experienced test pilot Huang Pingyang and the co-pilot beside him were nervous. Liu Yijiu's heart was even heavier.

This time, because the time was too short, the helicopter was completely made by opening a golden finger, and the entire research team can be said to be designing and learning at the same time.

Failure must not be tolerated!

Failure would be a heavy blow to all research teams across the base.

Huang Pingyang breathed a sigh of relief when he heard Liu Yijiu's words. To say not to be nervous, that is false. During the first test flight, he was really not nervous, and he flew the Z-7 too many times. Moreover, the flight at the beginning. It also made him feel that there was no problem.

But without feeling anything, the helicopter just fell from the sky.

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

"Xiao Liu, the fog outside has dispersed, and you can prepare for a test flight, you see......" Zhan Like is almost a miscellaneous now.

"Just follow the steps of the original plan, and you don't need to ask my opinion." Liu Yijiu nodded.

With Janrico in action, the base's logistical pilots began to clear the site and push the huge helicopter out of the hangar onto the outside tarmac. Then another round of inspections 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. In the beginning, you have to be careful.

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

Test pilots, lives can be sacrificed at any time because of the mission.

But Huang Pingyang has no regrets, after all, he likes challenges, and he has already experienced the operation of the Z-91 once.

The last time he fell from the sky tens of meters, he did not receive any injuries, and the deformation of the fuselage of the aircraft was not very serious, which has proven the reliability of the structure, as long as it does not fly too high, the problem is 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, is much more complicated to operate than the Z-7, but it is much easier to operate. After all, most of the technology of Z-7 is derived from Z-5 and Z-6, most of the auxiliary operating systems are mechanical, and the research work of the Ninth Academy in hydraulics has expanded since 77 years, and many of the systems on it are hydraulic.

Save labour.

"Boss, I'm nervous...... "The test pilot of the co-pilot, who is not very experienced, was originally a Z-5 pilot in the army, in his twenties, if it wasn't for some relationship with Zhan Liko, how could he not have his turn.

"There's nothing to worry about, just do what we normally do." Huang Pingyang endured the tension in his heart and said calmly.

Once bitten by a snake, he was afraid of the well rope for ten years.

Moreover, under the buttocks, it is not the old and backward straight-5, but the golden pimple piled up by eight million yuan!

Eight million, the largest face value of the Republic of China is ten yuan, which can be piled up on a hill as big as this helicopter.

And that's still the price without the addition of weapon systems!

The ground command kept gesturing to signal that the helicopter was ready to take off.

Huang Pingyang took a deep breath, put on the flight helmet, put the headset in the right position, put down the goggles, and gently pressed the ignition button of the engine. While monitoring the operating status of the engine, the switches of various other devices are quickly turned on.

The young co-pilot, who was still nervous, under the influence of Huang Pingyang, also began to follow the operation of the training during the simulation, and began to open a few auxiliary operation buttons, these actions, they have been training for half a year. I am already fully familiar with all kinds of operations.

"Boom, boom, boom......" As the engine roared, the helicopter's originally low-hanging blades slowly began to rotate slowly in the hub.

Because it is a dual-rotor coaxial helicopter, in order to prevent the two sets of rotors from interfering, the top pair of rotors rotates first, and until the rotors have been fully expanded to form a flat rotation circle, the second pair of rotors rotating in the opposite direction below rotates rapidly.

"Buzz ......" As the output efficiency of the engine continues to increase, the rotor rotates faster and faster.

Seeing that the indicators have been lit up, and the two palm-sized computer display screens in front of the console have fed back the status detection data to the top, and the parameters are normal, Huang Pingyang gave a thumbs up to the ground crew commander wearing a red eye-catching suit not far in front of the helicopter, indicating that it can take off.

"Take off! Pay attention to the flight attitude, the range of action is smaller, take your time! Liao Zhuojing's hand holding the walkie-talkie was trembling, and finally mustered up all the strength of his body before he spit out a small sentence.

In the last test flight, he had never been so nervous.

After the accident, he panicked for a long time. The cost of these helicopters, one of them, is almost equal to the entire project fund of the Z-7 they originally studied.

If you fall once, you will scrap millions!

Everyone held their breath and their hearts were about to stop beating at the sight of the helicopter shaking slightly. The failure of the last time made everyone cautious. In order to confirm the problem, let the helicopter hover at a height of about one meter above the ground after it is out of the ground and before it flies, and let the rotors run for a while longer, so that even if there is any problem, there will be no more of what happened last time.

The helicopter hovered at a height of one meter above the ground, and the two rotating rotors stirred up a strong wind, causing clouds of dust to roll up on the surface of the three-fold earth covered with carbon slag, but no one was frowning at the side of the observer.

"It's time to fly!" Liu Yijiu's originally hanging heart suddenly breathed a sigh of relief.

"Fly! Straight-91-02! When Liao Zhuojing heard Liu Yijiu's words, he almost used all his strength and roared out!

"Fly! Straight-91-02! The others roared in unison!

Huang Pingyang felt that he saw those old men in the dust not far away crying, and it seemed that Director Liu, who had always been extremely strong, was also choking and shouting.

Pulling up the joystick, the helicopter, which had been hovering slightly, began to quickly rise vertically towards the sky...... (To be continued.) )