For a long time, the field of aero engines has practiced "model traction", that is, the principle of simply treating the engine as an aircraft component.

At that time, when the aviation industry had just been established from scratch and was dominated by imitation and licensed production, this model was indeed conducive to concentrating already less resources and conquering the production of key models in a short period of time.

However, with the gradual progress of Huaxia's technical strength and independent research and development, the disadvantages of this way of thinking have gradually been exposed.

The most important thing is that each R&D unit, and even different models of the same R&D unit, are fighting each other, and there is almost no technical relationship.

Each aviation development project starts from scratch, and it may be abandoned halfway due to the loss of the installed object at any time, and the R&D efficiency will naturally not be optimistic, even if it is left in countries such as the United Kingdom, the United States and the Soviet Union.

Coupled with the thin foundation and low investment in the field of aero engines, there is a large gap in the spectrum of domestic aero engines.

The disadvantages brought about by the model traction have a profound impact, and in the previous life, it even lasted until Chang Haonan's rebirth.

For example, the Coach 10, which looks better than the Coach 9, has been plagued by a shortage of engines for a long time.

The turbofan 17 "Minshan" has gone through many twists and turns of launching and dismounting, and has never been able to achieve mass production.

Technically speaking, this kind of small-thrust turbofan, which can be done without an afterburner, is not complicated, at least it cannot be more difficult than turbofan 10 and turbofan 15.

The reason why it has been delayed is largely because in the "model traction" mode, even a small push has to build wheels from scratch (for example, the turbofan 11 that surveys and maps the imitation AI25 has been engaged in for 10 years).

And for a large UAV whose training aircraft and the sum of several outputs may not exceed double digits, whether it is necessary to toss around so much has become a very tangled question.

In 2016, when the decision was finally made to abandon the Turbofan 17, this choice seemed like no problem.

However, due to well-known reasons, Ermao suddenly and completely lost the ability to continue producing AI222-25 a few years later, resulting in the production and service progress of Coach 10 being affected.

A series of large high-altitude jet UAVs can only go back and choose the turbojet 7 with the afterburner removed as power.

Now, although Chang Haonan has begun to change this status quo nearly 20 years in advance, it will take some time, and judging from the current situation that a turbofan 10 has to concentrate more than half of the country's strength, I am afraid that it will be difficult to have additional energy to take care of those non-key models in the short term.

After all, there is a training cycle for the talent team.

Of course, this thought process, Chang Haonan can't say it clearly.

So Zhang Zhenhua was still a little puzzled at first:

"Mr. Chang, we are now even developing the third-generation turbofan with high thrust, why do we still need to introduce light turboshaft or turboprop engine technology?"

In the face of this kind of straight-ball question, Chang Haonan can only "polish" the reason a little:

"Zhang Gong, I, after all, I am not a god, my energy is always limited, and it is impossible for all models and all projects to be plugged in."

After saying a word, Zhang Zhenhua already had an indescribable expression on his face.

That basically means "You're not a god yet?" ”

However, Chang Haonan didn't notice it, but continued to explain:

"Besides, as you know, we have been studying axial engines for a long time, and these lightweight turboshafts and turboprops generally use axial flow and centrifugal tandem methods, which is not in line with our current main direction."

"If we can complete the 300kw engine model sequence in China at a relatively limited cost, it will also be a great boost to the development of China's aviation industry."

"But Mr. Chang, we don't seem to have a model that needs such a level of engine right now?"

Zhang Zhenhua has worked in the 430 factory for nearly 20 years, although he is also dissatisfied with the status quo of "model traction", but when it comes to analyzing specific problems, it is inevitable that there will be path dependence——

Therefore, he subconsciously believes that it is difficult to get on an engine without an installed object.

This question gave Chang Haonan just the opportunity to say his further thoughts:

In fact, the light turboprop of the 300kw class should soon have an installed object.

One is a new type of primary training aircraft that must be needed after entering the new century - Chujiao 6 is a classic, but after all, it is a model nearly 40 years ago, and it can no longer meet the needs of flight training in the new era.

The other is the long-endurance inspection and combat integrated UAV that Chang Haonan talked about with Guihang Industry before.

In the previous life, Huaxia suffered a lot of losses in UAV power, and could only choose to introduce and produce a low-power piston engine from Austria, which delayed the development of many models.

A lot of business, especially the technology business, was much better in the '90s than it was twenty years later.

But Chang Haonan didn't talk about these things.

First, Zhang Zhenhua's level is not enough, and these things related to aviation industry planning are not easy to mention.

Second, Chang Haonan feels that at this critical time, he needs to be a model.

A typical example of "the engine was launched without a suitable model and then succeeded".

Just like the fact that the factory raised its own funds to develop aircraft, it was also after Hongdu engaged in the K8 training aircraft and achieved great success that it was gradually accepted by the entire aviation industry system.

Now everyone knows that there is a problem with the "model traction" model.

But if you directly separate the aviation development industry from the aircraft model, except for Chang Haonan, who is a reborn, no one knows whether it will work or not.

Just like Zhang Zhenhua just now, he was inevitably affected by the inertia of thinking.

At this time, if the 430 factory and Xiluo Company can give a sample, then the resistance is bound to be much smaller.

Therefore, after briefly organizing the language, Chang Haonan slowly spoke:

"Aviation power research is a long-term topic, and the research and development cycle of aviation development is longer than the aircraft itself, so we can't wait until there is a model demand to think about research and development, Zhang Gong, we have suffered too much in the past."

"Far from it, let's just say that turbofan 9 and turbofan 10 are both aircraft and other engines, and during this period of time, we have to rely on imported foreign models for transition."

Speaking of this, he stretched out two fingers and gently tapped the table in front of him to emphasize:

"Even if the J-7 and J-10 J-11 are both national key projects, you can concentrate on tackling key problems, you should know how many things have been delayed in the middle, so people have no foresight, there must be near-term worries, and we are about to enter the new century, and our thinking must also keep up with the times......

Chang Haonan's words still have some weight in the aviation industry system, especially in these units engaged in aero engines.

Therefore, although Zhang Zhenhua still felt a little suspicious in his heart, he did not say anything to refute:

"Then Mr. Chang, after I go back, I will report your attitude to the company, and let them find a way to negotiate with Luo Luo?"

"Yes."

Chang Haonan nodded, but soon stopped Zhang Zhenhua, who had already put the small book in his hands and was about to leave:

"However, there are two things that must be ensured."

"First, there must be a complete technology transfer, and the hard technical barriers of this small turbine are not high, so it should not be difficult to talk about it."

"Second, after we get it back, we have the right to improve the product according to our own standards and needs, and we can't be controlled by outsiders."

When Zhang Zhenhua heard this, he almost subconsciously stood upright:

"Understood!"

(End of chapter)