How many years have this been, how can the company still have the idea that the plane is not on the horse, and the engine will not have the opportunity to match, which is really disappointing.

"Stop, what is called no supporting aircraft on the horse, we have no engine model on the horse, how many times have we said that the development of the engine must precede the research and development of the aircraft, the aircraft design work is to compromise the engine, and other supporting subsystems of the project. Therefore, our engines need to be developed one step ahead of airplanes, and I said this at least a hundred times, right? ”

After saying that, this Yang Hui was also very angry, and he sat there for a while and didn't want to say anything, he just wanted to be quiet.

However, the situation does not seem to be as bad as Yang Hui thought, in fact, the 608 Institute here has already had an idea.

"Mr. Yang, we all know these, so we have done a lot of pre-research work, and now we can basically do pre-research generation, development generation, equipment generation, equipment model and service there is a turboshaft 8 engine, localization and meet the requirements of the French side, there is a turboshaft 8A engine, is expected to be finalized and delivered next year, which is a model in development; As for the pre-research, we have two models. ”

This is a bit interesting, the pre-research generation, the development generation, the equipment generation, this is indeed the domestic equipment development tone set in the 80s, and it is also very good, after 10 years in the new century, finally broke out all kinds of fruits.

Now, Yang Hui is not interested in equipment and the two generations in development, and the only thing he is interested in is the so-called pre-research, which is already a model pre-research, and the technology pre-research mentioned before is two different things, and it cannot be confused.

Still very interested: "Okay, then let's talk about it, what is the situation of your model pre-research, I am very interested here, if it is feasible, even if the state does not support this project, our head office will find a way to squeeze out funds to support the internal research and development work of the engine company, anyway, the engine must go to the front of the aircraft." ”

And this time, what exactly the model of the 608 Institute has been pre-researched, the situation is still a little confusing.

"First of all, we have pre-developed two engines, both of which are based on the existing turbofan engine core engine improvements, including our imitation TFE-731 engine, the domestic code name turbofan 11. The turbofan 11 has a thrust of 1.6 tons after being finalized, the duct ratio is 2.8, and the ground static flow rate of the core engine is 14KG/S, which is converted to a sea level flow rate of 5.4KG/S, which is roughly equivalent to the core engine used by the T-700 turboshaft engine in the United States. ”

It's a bit interesting, this imitation of the turbofan 11 engine, the core machine performance can also be compared with the general T-700 turboshaft engine, which is good news, which at least means that as long as you are willing to improve on the basis of the turbofan 11 core engine, then one day you can get a T-700 turboshaft engine.

And this T-700 turboshaft engine, that is famous, the United States Black Hawk helicopter is the first generation of magic aircraft equipped with this engine, and the awesomeness of this aircraft is naturally needless to say.

If the Republic can really develop such a turboshaft engine, the Republic's own 10-ton general purpose helicopters and heavy armed helicopters, then there is no need to worry about the engine, it is definitely full of power.

"Interesting, continue, go on, you say this, I feel that the introduction of this engine back then really didn't suffer at all! It can be said that it has made a lot of money, not bad, not bad! ”

Yang Hui is given a little sunshine, it can be brilliant, if the turbofan 11 engine can really be so good, it would be good.

But the 608 Institute is not very optimistic about this core machine: "From the perspective of the flow of the core machine, it can indeed meet our research and development of a turboshaft engine comparable to T-700, but structurally speaking, this core machine is not very suitable for changing to a turboshaft engine, as a turbofan engine with gear transmission technology, the core engine of the turbofan 11 engine can actually be regarded as a double-rotor turbofan engine, which is much more complex than the single-rotor core machine of the T-700; On the other hand, the core engine of the turbofan 11 is a 4-stage axial flow plus 1-stage centrifugal compressor design, which is less than the 5-stage axial flow and 1-stage centrifugal type of the T-700. Mr. Yang, you should be clear about what this means. ”

Continuing the words, Yang Hui of course knew what this meant: "It means that the turboshaft engine developed on this core machine in the future will be more difficult than the T-700 in terms of subsequent improvements, which means that with our basic industry at a lower level than the United States, it is definitely impossible to reach the level of the T-700 engine, the basic model of the T-700 can reach 1500 horsepower, and we can reach 1100 or 1200 horsepower at most, and it will be inferior to the T-700 in many performances, right?" ”

"That's right, if we develop a turboshaft engine based on the core engine of the turbofan 11 engine, we will probably get a turboshaft engine with the same power as the latest improved PT-6B, which is not enough in power if it is used as our ten-ton utility helicopter, after all, there are more plateau areas in our country."

In the republic, the research and development of an aircraft can never escape the plateau take-off and landing indicators. And the plateau take-off and landing requirements are actually very simple, anyway, under the same conditions, the engine is more than 10 to 30 percent of the reserve power in the plain area, but this is for the republic, heart disease is a big problem, and now you have to ask for plateau take-off and landing, in the face of such a reality, it is really powerless.

The Republic does have plateau take-off and landing requirements for helicopters, and the Black Hawk introduced that year used the T-700GE-401 engine, which is more advanced than the Black Hawk helicopter used by the American ** team, reaching 1700 horsepower, so it is not a good choice to develop a turboshaft engine on the core engine of the turbofan 11.

Of course, this engine also has its advantages, the turboshaft engine with twin-rotor design is inherently cheaper in fuel consumption, and the design of the compressor itself is one level less than the T-700, and it can always take some advantage in volume.

However, the power can't go up, and every qiē is a floating cloud

"It seems that it is not very reliable to develop a new turboshaft on the basis of the turbofan 11, so the other core machine should be the guy used on the **-4 turbofan engine, right? Tell me about how you have developed this core machine, which is a level larger than the turbofan 11 in terms of air flow, and even a lot larger than the T-700, right? ”

It's not just a lot bigger, when this engine was designed as a turbofan, it was already a storage zài that could reach 3.5 tons of thrust, and indeed some of this is because this engine was born late, and the engine's bypass ratio has reached the level of 4.1. But even so, the flow rate of this core machine is still 9.3KG/S, and if such a core machine is changed to a turboshaft engine under normal circumstances, it is possible to reach 2700 horsepower.

However, this is a normal requirement to have the basic industrial level of Western countries, but it can reach such a technical level, but at the level of the republic, if a 2300 horsepower turboshaft engine can be developed on the basis of this core machine in the 90s, it will be considered very good, but the republic owes too much in the turboshaft engine industry. (To be continued.) )