Due to the high hopes for gear transmission technology, Yang Hui originally planned to follow up the localization process throughout the process, but a bunch of miscellaneous things at the base nailed Yang Hui to the position of permanent secretary general, and he couldn't move at all.

Not to mention the follow-up gear transmission technology, even Yang Hui can't stay in the second institute for a few more days, and the design of Jianlian Seven has come to an end. Although the turbofan 10 was not installed as planned, it could only be temporarily replaced by the turbojet 7, but at the request of the army and foreign parties, the Jianjiao-7A that adopted the turbojet 7 model in advance entered the final test flight finalization.

Yang Hui needs to be responsible for the hospitality of these bigwigs, no matter where it is, it is a major event at home and abroad, and it is necessary to prepare for half a month in advance.

When the last flight test flight was completed, the plane taxied into the hangar, and the crowd erupted in warm applause.

With an investment of hundreds of millions of dollars, we have finally seen the results, and we have begun to slowly recoup our investment, and an aircraft that everyone is looking forward to will be finalized and put into production today.

"Nie Shuai, this is our new aircraft, and a total of $570 million has been invested. From the introduction of the most basic computer-aided design, to the testing of the fly-by-wire flight control of the aircraft, and the development of supporting engines, our new aircraft has adopted hundreds of new technologies. ”

The new technology here is not a simple improvement on the original J-7, and ordinary minor repairs and minor repairs must not be counted in it.

It sounded like Yang Hui was just introducing Nie Shuai, but Nie Shuai was not the only one who followed, and Driver Liu of the Navy did not come. However, Yang Hui's future father-in-law was sent by mistake.

Yang Hui's hairy-footed son-in-law is quite good now, and this time he came to talk to Yang Hui. But that's not what I'm doing now.

"The plane is good, and we are waiting for the new aircraft to be finalized and put into service. The Navy urgently needs this trainer. ”

As soon as they came, they were in a hurry to ask for planes, which was certainly unbearable, and the Air Force and Pakistan followed closely behind.

"Our Air Force is more urgently needed, and our J-7 and J-8 aircraft are much more basic than your Navy, so we are in urgent need."

"We, Pakistan, as investors, have the right to get the planes in the first batch, and if the production capacity is not enough, the new production line that we are building in Pakistan can also be used for production."

The Pakistani production line is still in the procurement of production equipment, heavy-duty high-precision production equipment. It is difficult to have inventory of these things, and it is impossible to get the equipment when you give money, so you have to wait patiently.

Therefore, the Pakistani production line was built and put into use, at least until the end of 86, and now, it is far from quenching the thirst.

"Of course, the big new production line on the Pakistani side will be able to be put into operation as planned. We will definitely put the Pakistani order in Pakistan and produce it in Pakistan, and I am afraid that we will not be able to start production in Pakistan now. However, we have already contacted 0132, and 0132 will produce some of the aircraft to meet the needs of all aspects. ”

A piece of news that satisfies all parties. Only then did he take everyone to the production line, and the final test flight project has been completed under the witness of everyone, the first finalized production aircraft. That has quite a special meaning.

The production of the first aircraft, in fact, began long ago. The production cycle of an aircraft is never short. From the initial blanking to the production of the main fuselage load-bearing components. To the final completion of manufacturing, delivery, and test flights, the intermediate production cycle is calculated according to years.

When the leader came to see the first finalized production of the new aircraft, he must not let the leader see the production of those fuselage components, and how to let the leader see the appearance of the aircraft.

As a result, the wing manufacturing of the new aircraft has become the focus of this performance, and the leaders inspect and watch the production of the aircraft, which is not a good thing in terms of production alone, and it is certain that it will affect the production efficiency.

Fortunately, this time it is the finalized production of the new aircraft, and the workers themselves have not yet become proficient, and even if there is no leader, it is difficult to reach the peak of efficiency.

Yang Hui weighed it and decided to take the leaders to take a look this time to satisfy the curiosity of the leaders.

If you can attract the attention of the leaders above, allocate more money, or tilt the policy to the base in the future, then you will make a lot of money.

Walking to the wing manufacturing workshop, what I saw was a typical sheet metal working environment, there was no machine tool that looked dirty at a glance, and the bright workshop gave the leaders who came to watch a pleasing feeling, at least it looked quite neat.

"Nie Shuai, this is the wing production workshop of the new aircraft, the wings of the new aircraft will be manufactured here, and then transferred to the assembly line next to it to complete the final assembly of the aircraft."

When Nie Shuai walked in, he had already seen the situation in the production car technology clearly, the wing spars, long trusses, and wing ribs on the bench had been fixed and connected together, and the general wing structure had come out.

The last thing left is to rivet the skin, this process is to be performed in front of the leader, and the workers standing next to him have already put on their work clothes.

The workers and masters took care of it neatly, and now in front of the wing frame, the formed skin is placed next to it, waiting for an order, and it is ready to be punched and riveted.

Nie Shuai walked forward, came to the wing, looked at the new wing structure that was completely different from the simple delta wing airfoil, and bent down to look at it curiously with his hands behind his back.

"Yes, it's very different from the wing of the J-7, let's start, I'm here to watch your first wing roll off the assembly line."

After speaking, he gave the worker in charge of riveting an encouraging look, and then stepped back and stood aside with everyone, trying to reduce the impact of his group on production.

Looking at the situation, Nie Shuai really planned to wait until the wing manufacturing line went offline, Yang Hui had no choice but to call a few more workers to come together to speed up the manufacturing of this first pair of wings.

"Let's go together, and work with your squad leader to make this pair of wings, it won't take long to skin the wings alone, but pay attention to the quality, don't make a mistake."

After some instructions, several workers went to work again, and the skin was positioned and clamped together, followed by a riveting process to fix the skin to the surface of the wing frame.

The wing frame and skin constitute the plate rod structure and closed box section, which can withstand the five kinds of forces of tension, compression, bending, shear and torsion during the flight of the aircraft, and resist the harsh stress environment in high-speed flight.

However, it is not easy to completely connect the skin with the stringers and wing ribs, riveting is the most mature and economical method, but riveting also has its own defects.

To fix a piece of skin, it is necessary to make rivets in strict accordance with the regulations, but it is not easy to make rivets on an airplane, and in order to reduce the weight, the number of rivets needs to be strictly controlled.

Even the position of each rivet is strictly calculated, where it should be hit, and how much force it should bear, which is required in it.

For example, after calculations, five rivets need to be punched in a row, and each one has to withstand the maximum capacity it can bear.

This requires that when riveting, each piece must be riveted into place, and there can be no loosening or misalignment. Once one of the rivets is not riveted in place when riveting and is loose, it will be fun.

The force that should have been borne by five rivets was borne by four rivets, and the other one could not be used, which is the most typical connection failure.

In order to control the weight, each rivet was squeezed to the limit, and now four rivets are bearing more force than they should have withheld, and it is normal to break early.

If this is in flight, it will cause the skin to be unable to be fixed to the frame of the wing, and it will definitely fall off.

The skin has fallen off, and the aerodynamic shape naturally cannot be maintained, and the rest of the matter, needless to say, knows the end.

Anyway, whether or not you can successfully land and return in the end, it is a flight accident. (To be continued......)