Yuan Zhen attaches great importance to Wang Buan.

Wang Buan was not very interested in him. It's even a little dismissive.

Why?

It's overkill!

Yuan Zhen's position seems to have been misplaced.

Wang Buan actually knew who Yuan Zhen was. He is a very famous aircraft designer in China. Meritorious.

Under Yuan Zhen's name, there are a lot of excellent works.

However, J-8 is not Yuan Zhen's work.

Even, he has no connection with Jian-8 at all. I can't hit it with eight poles.

The original prototype of the J-8 was a very old MiG-21 fighter. It was from the 60s. It's been almost sixty years since today.

However, don't be underestimated the MiG-21 fighter.

It is a high-quality second-generation aircraft, small in size, good in maneuverability, fast in speed, walking in the rivers and lakes for 60 years, manufacturing tens of thousands, and outstanding military achievements.

The shortcomings are that the amount of fuel is too small, the range is short, the nose is intake, and the equipment compartment is too small to fit a large radar.

To this day, there are still many countries whose main force is the original MiG-21.

Basically contemporaneous with the MiG-21 is the F104 fighter of the US imperialists.

At that time, the designers of aircraft in our country were faced with two options.

Is it an imitation of the MiG-21?

Or is it a copy of the F104?

Or neither? Or both?

In the end, a hundred schools of thought contended, a hundred flowers bloomed, and many strange designs appeared. Among them, there is a series called Dongfeng Fighter.

You read that right, it's the Dongfeng fighter.

It's not the Dongfeng Intercontinental Express that everyone is familiar with now.

The Dongfeng 113 fighter, which has died, looks very beautiful. What J20, completely incomparable to it. It's a pity that he died.

After walking a lot, much, a lot ...... After the detour, the eighth master finally came out.

Because of its slender and streamlined body, its nickname is very special:

Beautiful man in the air.

Cai Guoqing in the air.

It is estimated that my rabbit's feelings for the eighth master are too deep, the imported Su-27 has been retired, and there are still some eighth masters who continue to be active in the sea and air.

The first-generation J-8 did not have all-weather combat capabilities. It can only be flown during the day.

The second-generation J-8 has increased all-weather combat capabilities.

The third-generation J-8 increases its fighting ability.

Because the J-8 is a relatively backward fighter with relatively backward comprehensive performance, it has not been changed since then.

The current skystars that attract the attention of the world are J20, J15 and the like.

This time, it was Yuan Zhen who temporarily transformed it.

The main goal, in fact, is to test the performance of the 125 jet engine. Validation for other fighters.

And as a fighter, J-8 has entered the list of elimination.

However, even so, the J-8 test aircraft also needs to take into account all aspects.

How do you need to get a facelift to get all the performance out of the 125?

The 125 jet engine completely did not take into account the need for stealth.

Wang Buan didn't think about it so much at the beginning. I just want to pile up the thrust.

As it turned out, the thrust did go up. But stealth performance is worrying.

Stealth performance isn't a must, though.

After all, in many areas, thrust is more important than stealth performance.

For example, in the field of transport aircraft.

For example, heavy fighters.

The F-15 heavy fighters of the US imperialists do not have stealth performance! They are also the kings and hegemons, and they do not want to beat the MiG-29 to the core.

The original design concept of the 125 was to support the transport aircraft.

If needed, it is equipped with a stealth fighter. That's definitely going to be redesigned. Perhaps, this is the main task of the 220 Institute?

Otherwise, how could the state pay you a salary of 18,848 oceans every month?

Do you think that the country's funds are blown by the wind?

Fallen into a trap......

What a big trap......

"Wang Buan, are you nervous?" Liu Zhenhua said with a smile.

"Not nervous. Wang Buan shook his head.

"Why?"

"What's so tense about this?"

"125 The first time you go to heaven, you don't worry about what will go wrong?"

"Absolutely not. ”

Wang Buan said confidently.

Problem?

How can it be?

This is not from Factory 7404.

From beginning to end, it was produced by robot elves. 100% original Cybertron technology.

Someone else is a 9999-level technology, will there be a problem?

Definitely.

But definitely not the earth.

"Chief Engineer Wang, please check the installation of the engine first to see if there are any problems. Yuan Zhen said solemnly.

"Good. Wang Buan nodded. Han Xuewei and Xia Nan were also called.

Yuan Zhen handed him a thick reference manual.

The manual contains detailed data on the connection between the engine and the fuselage.

The combination of the engine and the fighter itself is also a very advanced science. It is a very advanced skill in the design of fighter jets.

To talk about the engine release of fighters, there are absolutely variety, all kinds of things.

Some are hidden inside the belly.

Some are suspended under the wings.

Some are installed in the nose position.

Some are installed in the tail position.

Some engines are so large that they occupy almost a third of the fuselage. For example, the MiG-25 and so on.

Different engine arrangements will affect the performance of different fighters.

And the number of engines also has a great impact.

It's not just a matter of thrust, it's also a question of safety, balance.

The vast majority of fighters are arranged in a twin-engine arrangement. On the one hand, greater thrust can be obtained. On the one hand, it's for safety.

Twin-engine fighters, even if one of them is damaged, the other can still work.

If it is a single-engine fighter, if it is damaged, then it is a tragedy.

The J-8 has always been a double-engine configuration.

This time, the facelift has not changed. It's still a twin-engine equip.

Wang Buan began to examine it carefully.

It's not as simple as taking a look.

Every component needs to be carefully inspected.

You know, this is not a ground test, nor is it a high-altitude test. It's really going to fly into the sky.

The J-8 itself is not expensive.

But the life of a test pilot is very precious.

If there is an accident and the plane is dropped, the economic loss is a trivial matter. If there is an accident with the test pilot, then it is a big deal.

Any test pilot is a treasure of treasures.

Moreover, if there is an accident, it is equivalent to announcing the death penalty of 125.

Want to try it a second time?

Dream!

Others simply won't give you a chance.

There are more engines that want to go to the sky. You've failed. Someone else will take his place right away.

Wang Bu'an reached out and stroked the fighter.

Robot Elf No. 1 immediately infiltrated all corners of the fuselage and examined it carefully.

Not only the installation of the engine is checked, but also other parts of the fighter are checked by the way.

There are a total of five test machines in this time.

Of these, the exterior of two aircraft is made of aluminum skin. The exterior of the three frames is made of stainless steel.

What is the difference between aluminum skin and stainless steel?

The former is very light in mass.

The mass of the latter is heavy.

The fighter made of aluminum skin weighs only about 12 tons.

The fighter made of stainless steel weighs more than 18 tons. The difference in weight between the two is almost 50%.

The former, which is a light fighter, is agile and good at fighting.

The latter is a medium fighter.

Why is stainless steel used to make the exterior of an aircraft?

It must be to break through the speed of 2.5 times.

It went in the spirit of double three.

Flight speed Mach 3.

The flight altitude is 30,000 meters.

Compared with the prototype of the J-8, these five fighters have major changes.

The main change, of course, is the elimination of the fuel tank.

Since the 125 does not require aviation kerosene at all, it is naturally not necessary to maintain fuel tanks.

This also greatly reduces the take-off weight of the J-8.

Due to the elimination of the fuel tank, it is also much simpler in terms of counterweights.

For any kind of fighter, the counterweight of the fuel tank is a very advanced knowledge.

You know, jet fuel is liquid and can flow. Fighters make different gestures, and aviation kerosene is not in the same position.

If the shape of the fuel tank is not handled well, it will seriously affect the maneuverability.

However, all this is not visible from the top of the testing machine.

What to do with the free space?

Of course, it's used to hang weapons.

Under normal circumstances, the J-8 will take off with at least three tons of aviation kerosene.

That is to say, after the cancellation of the fuel tank, the J-8 test machine will be able to carry at least three tons of bombs.

From this point of view, it is also possible to play the role of a bomber on a temporary basis.

A three-ton bomb can destroy a lot of targets.

The biggest weakness of the eighth master at the beginning was that the thrust of the engine was too small, which led to the inability to suspend more weapons.

No problem now, no problem hanging it into a Christmas tree.

It took a full hour for the No. 1 machine to be completed.

Wang Bu'an didn't make any changes.

This is absolutely not allowed.

If he is now transformed, upgraded, and gets good test flight data. As a result, something happened later, what should I do?

In general, there are no major obstacles.

Sign.

Confirm.

Repeated signature confirmation.

This means that if something happens, you are responsible as a designer.

Wang Buan is not only a designer, but also a researcher and producer.

In other words, all the responsibilities have to be shouldered.

Of course, Yuan Zhen couldn't run.

It depends on the conclusion of the accident appraisal and whose responsibility is in the end.

Not excited.

Not hot-blooded.

It feels like a routine.

There was no skyrocketing excitement at all. It feels like it's a trivial matter!

"Chief Engineer Wang. This is for you. ”

"Chief Engineer Wang. This is for you.

Xia Nan brought back a lot of test flight materials. Among them, there are various project arrangements for test flights. Everything has to be done according to the procedure.

It's not like you can fly if you want to.

It's not about flying how you want.

It must be flown according to a predetermined route, altitude, and speed. No mistakes are allowed.

Han Xuewei also brought back a lot of observation equipment. Including telescopes or something.

Test flights are a long process. It takes a long time.

However, the most critical thing is the first few days.

If there is a real problem, in the first few days, it will be revealed.

"Wang Buan, are you confident?" asked Liu Zhenhua.

"Yes!" Wang Buyan replied loudly.