When it comes to the engines used by fighter jets and helicopters, there is actually a difference, and the difference is not small.

Fighters use turbofan engines, and the working principle of this engine is turbines of different levels at the front end.

During work, a large amount of air is sucked in, and then part of the air will pass through the compressor and pass into the combustion chamber.

After combustion, it will be sprayed out from the nozzle.

The other part of the air is directly sprayed out through the outer duct.

The fighter jets also rely on these two kinds of airflows injected out to obtain a reaction force, thereby obtaining forward power in the air.

And helicopters are completely different.

The helicopter uses a turboshaft engine, and its working principle is probably similar to that of a turbofan engine.

However, because helicopters do not need to be as fast as fighter jets, the connotation and design of the helicopter engine are different from the turbofan engine.

Because the connotation of the helicopter emphasizes improving the unevenness of the airflow and air field, so that the air can be fully burned in the combustion chamber.

In addition, a multi-functional air intake channel must be designed to avoid dust and gravel in the air entering the combustion chamber and directly destroying the combustion chamber.

Moreover, at the tail of the turboshaft engine, there is an output shaft, which is also linked to a bearing.

And above this bearing, the propeller is connected.

In this way, while the turbo shaft engine works, the helicopter will obtain power to fly forward, it will also drive the propeller to rotate through the output shaft, allowing the helicopter to obtain upward lift.

This is the working principle of the turboshaft engine!

If we are talking about turbofan engines, we are gradually catching up, but in the turboshaft engine, we are still far behind.

For example, after we first introduced Black Hawk, we borrowed Black Hawk's engine and wanted to copy it.

Unfortunately, the final result was that I was stunned when I opened it and I couldn't understand the principle of this engine at all.

What's even more exaggerated is that in the end we actually wanted to restore the original and put it back, but we couldn't even put it back.

Later, I simply dissected the engine and conducted research, but we only found that the difference between the Americans and us was really desperate.

For example, the bearings used on the black shadows in the civilian version can have an accuracy of up to 6 wires.

In severely cold areas like the Qinghai-Tibet Plateau, you can work continuously for thousands of hours without deformation.

It does not affect the performance of the helicopter at all, but our copycat version will work thousands of hours.

After working for more than a hundred hours, I sent it back to the factory for overhaul.

The gap in materials alone is enough to make people desperate.

Later, we also put a lot of effort into the materials and finally figured out what alloy the Americans used to make this kind of bearing.

But with the materials in hand, the processing is starting to make people difficult again.

Just talking about the accuracy of these 6 wires, we can't make it any.

You should know that the bearing itself is made of titanium alloy doped with chromium and nickel, and this special alloy has a very high hardness.

Using an ordinary five-axis linkage machine tool, your tool is not hard enough and you can't process it at all.

Even if you buy a hard enough tool, the benches and fixtures of ordinary machine tools cannot withstand the huge stress caused by high drilling speed.

The most common cause is that the machine tool was damaged and injured due to excessive use.

Finally, we had to suspend research and development in this area. After all, it is really not possible to be strong!

But seeing that there are 20 and the next generation of armed helicopters over there, they are still hungry for feeding.

In the end, we had to endure it and started "cooperation" with the French.

But to be honest, since then, our military has also changed its thinking.

After all, in terms of helicopters, the technological gap between us and Russia and the United States is too big.

If we keep doing it with our teeth, it is very likely that we will always be behind others in the next few decades.

So maybe we should just work hard on tanks, as for the helicopter horse...

At worst, we should not use it in large quantities on the battlefield.

After all, when a helicopter appears on the battlefield, it is basically the case that one side has already obtained absolute air supremacy.

With our current strength, even if our current fighter jets are very average, there is no country that dares to say that they can obtain absolute air supremacy in the competition with us.

After all, there are too many long-range strike weapons now. Our planes are not good, but we have missiles!

Moreover, in recent years, the emergence of drones has provided our China Airlines with a new development idea.

With the popularity of network intelligent mobile terminals, as our Beidou navigation system is laid out.

The war in the future is destined to be dominated by intelligence and unmanned.

And drones will be destined to play more and more extensive roles on the battlefield in the future.

So although we can't create a very good helicopter, we can create more drones!

So in recent years, our military's drone technology has made rapid progress.

It can even be said that it has completely abandoned the hair bear and has become one of the few countries in the world that can challenge the United States.

Moreover, our drones have been exported to the Middle East in large quantities, and have performed very dazzlingly in various conflicts that have broken out in the Middle East in recent years.

The military also attaches great importance to this emerging weapon and military.

But that is because of the hopeless pursuit of the helicopter field, and now the emergence of Spark Technology.

Suddenly, the military discovered that they had found a tool that could quickly get closer to the United States and Russian helicopters.

Do you think they will be very excited?

After all, you have a helicopter, and not having that is completely different.

Moreover, the role of helicopters in modern battlefields, especially in street combat, is basically irreplaceable.

This weapon can transport soldiers to a strategic node at the fastest speed in street battles, and can also serve as a firepower output platform.

Provide maximum fire support to the soldiers, and basically no challenge.

It is a very good all-weather combat weapon platform, so the military is actually very fond of helicopters.

However, in the past, we have been unable to make breakthroughs in the field of helicopter aeroengines, so we slowed down our development speed.

The gap between us in the field of helicopter and aeroengines is not just that we cannot make high-precision bearings.

The helicopter's connotation processing is also very special.

Unlike the connotation of fighter aircraft aircraft, although the connotation of fighter aircraft aircraft aircraft aircraft aircraft is also a workpiece for curved surface processing, it does not require much curvature.

Because after the air is pumped in, it must pass quickly and then enter the compressor. After the connotation channel is mixed with the fuel atomization, it is injected into the combustion chamber to pressurize.

The helicopter's turboshaft engine has a completely different working principle.

Because the helicopter is to ensure that it can fly at subsonic speeds stably, the connotation channel of the helicopter adopts a convergent shape.

The convergent shape actually makes the inner channel spacious and the arc larger.

It is mainly to ensure that the airflow can be accelerated evenly within the duct, and to ensure that the airflow is at the inlet of the compressor, avoiding airflow disorders, so as to cause airflow isolation, resulting in engine shock and asthma.

Therefore, this requires very high requirements for processing tools. It is necessary to process a very large connotation channel, and also ensure the strength and airtightness of the workpiece.

The reason why the engines of the United States and Mao Bear can be achieved is purely because of their hard processing power.

Years of technical accumulation and very advanced processing tools.

And in this regard, we are far from it.

Needless to mention the transmission shaft and bearing, just talking about the large arc-shaped connotation processing will make our project worry.

Because we really don't have qualified processing equipment...

The reason why we "cooperated" with France later was because we could only commission the French to produce it in many key workpiece parts.

In this way, this engine is actually shared by us with France.

The technical parameters of the engine will definitely face a very large risk of leakage.

Moreover, France is a traditional ally of the Americans.

If one day we have a conflict with the United States, then the Americans force the French to express their opinions.

There is no doubt that the French must stand on the side of the Americans.

And maybe they will tamper with us at some part of our spin-20 engine.

You should know that the French have always had a disgraceful record in this regard.

The reason why Sa of Iraq was beaten in the First Gulf War was powerless to fight back.

It was because the computer he bought from France that the French activated the back door before the war began.

As a result, the entire Iraqi prevention and control command system was paralyzed from the virus.

Because of this, American talents easily opened an air corridor over Iraq...

So the military also knows that the French cannot trust it, but with the current situation, we really have no choice.

But with the emergence of industrial robots from Spark Technology, some of us have chosen.

That's why the boss asked the previous question.

Of course, Xiao Feng didn't dare to answer randomly at this time. After all, if he didn't think about it and said it was OK if he came up.

It's easy to be regarded as a liar.

So although he had a rough idea, he still chose to answer the boss's questions carefully.

Then he pulled out the engineers around him and asked the military technicians to make the demands, and then asked these engineers to try to give the answers.

It's true that when the engineers listened to the military's request and made simulated graphics on the computer.

All the problems were solved...

The big guys were happy because of a heart disease that troubled them, and an exception was solved, so everyone gradually let go. Everyone drank very happily that night...
Chapter completed!