Listening to Lin Guanghua's words, Zhuang Jianye subconsciously frowned.

Tengfei Group now does have a turboshaft engine, which is based on the HX-4-1 core engine and derived from the D-30 series of gas turbine power units through the improvement of the D-30 series gas turbine power unit.

Depending on the process, the D-30-Z series turboshaft engines are roughly divided into three versions, with power ranging from 296 kW to 554 kW.

At that time, Tengfei Aviation did not have any established model plan for turboshaft engines, but saw that the turboprop engine was maturing step by step, so I thought about whether we could use the mature reduction gearbox, transmission mechanism, bearing combination and control system on the turboprop engine, coupled with the derivation of the HX-4-1 core engine, and prepared to make some in-depth improvements and convert it into a special turboshaft engine for helicopters.

Due to the experimental nature, the benchmark model chooses the very mature D-30 series gas turbine power unit of Tengfei Aviation Power, hoping to accumulate experience for the conversion of turboshaft power of D-40 series or D-50 series in the future.

Because of this, the D-30-Z series turboshaft engine has entered the substantial research stage since a year ago, and the original take-off aviation power is not in a hurry, anyway, it is an experimental nature, and it is a guinea pig for the follow-up model, and the problem is whether there is a problem, and the good or bad should be put in the back to be slowly digested.

So when to take it out, Tengfei Group is very Buddhist.

However, after learning the specific parameters of the D-30-Z series turboshaft engine developed by Tengfei Aviation Power, the ministry and commission that received the notification immediately sent several expert groups to Tengfei Aviation Power to conduct extremely detailed research and demonstration on the D-30-Z series turboshaft engine.

Finally, it is concluded that the D-30-Z series turboshaft engines are in line with the supporting power scheme of the light multi-purpose dual-use helicopter just proposed in China, and will be supported in principle.

The light multi-purpose dual-purpose helicopter, which looks like a long name, is actually the later Z-11 helicopter.

In the early stage of the Z-9 alone, the mid-term of the Z-10 shines, and the Z-20 is towards the background of unveiling the prelude to the new era, the presence of the Z-11 helicopter is actually very low.

But low does not mean that it is not important, in fact, the starting point of the Z-11 is still very high, because its benchmark models are the French "Squirrel" series helicopters and the American Bell-206 series helicopters.

These two helicopters are world-renowned light helicopters, especially the Bell-206 series helicopters in the United States, which derive many sub-models according to different needs, the most important of which are three, one is the passenger sightseeing model, the second is the helicopter trainer, and finally the military model.

The first is the most common civilian model, which carries 7 people including the driver or hoists equipment of the same weight, which is used for short-distance passenger transportation, ground-to-air mapping, aerial photography and other purposes.

The second is the daily training of simple helicopter pilots and the adaptability training of go-around pilots, after all, the maintenance cost and use cost of light helicopters are relatively cheap, and it is an ideal platform for helicopter training.

The last and most important type is the light armed reconnaissance helicopter, the most typical is the Bell-206 series helicopter improved model OH-58A "Kiowa" light armed reconnaissance helicopter.

As the main component of the rapid assault force of the US Army Air Force, this helicopter forms a low-altitude firepower strike system with the AH-64 "Apache" helicopter gunship, which combines light and heavy, and is specially designed to resist the torrent of Soviet steel that may break through the Iron Curtain in the European wilderness.

As for the results, the Gulf War a few years later is the best proof of this.

Of course, the country does not expect what will happen in a few years, but in recent years, several French "Squirrel" series helicopters and the United States Bell-206 series helicopters have been introduced through civil aviation, and they feel very good after use.

In particular, troops, whether they are army aviation units that have not been formed long after the formation of the army, helicopter units that the air force itself has, or carrier-based helicopter units that the navy has begun to expand, need a large number of helicopter pilots, and training professional helicopter pilots will inevitably require professional helicopter trainers.

However, the lack of understanding in this area in China led to the fact that the helicopter trainer was still blank until the end of the eighties, and compared with the perfect fixed-wing training aircraft and training system, the gap was not a little bit of a star.

What's more, light helicopters also play a very important role in front-line reconnaissance, armed assault, and fixed-point anti-tank, especially after the introduction of the French "Little Antelope" light helicopter gunship, the army aviation has a high evaluation of this flexible and lightweight helicopter platform, and it is very hoped that the country can also have similar equipment, as an important force for aerial reconnaissance and ground-to-air anti-tank, after all, China is also threatened by the Soviet Union's steel torrent on the northern border.

Therefore, under the impetus of many parties, the light multi-purpose dual-use helicopter began to be theoretically demonstrated in 1986, and the basic structure was formally determined in 1988, and it was transferred to formal development.

Like many domestic aircraft, the light multi-purpose dual-purpose helicopter also has the uncertainty of power, according to the plan of the research and development project team, the light multi-purpose dual-purpose helicopter adopts the turboshaft 8 that imitates the French Arriel series turboshaft engine.

This with the introduction of the French "Dolphin" helicopter with the domestic turboshaft engine, the overall performance is not bad, fully in line with the needs of light multi-purpose dual-purpose helicopters.

But the localization has stumbled, the light multi-purpose dual-purpose dual-use helicopter development project team went to the vortex 8 production plant several times, although the manufacturer swears by it, but several leaders of the development project team are still a little worried, no way, are all old birds in the aviation industry, who has not experienced the embarrassing scene of aircraft and other engines?

In order for the light multi-purpose dual-purpose helicopter not to fall into the trap of the previous power system, and to turn a skit into a boring and lengthy soap serial, there must be another power substitution.

And this is also the common practice of the world's major aviation production giants, take Airbus as an example, their aircraft usually have three sets of power schemes, namely Rolls-Royce, Pratt & Whitney and GM, which is called a backup plan, and what is not good is that you can't hang yourself on a crooked neck tree, otherwise my aircraft is designed to be ready to seize the market, but it turns out that the power is not out, and Airbus has to cry to death.

In the past, there was no such condition in China, after all, there were only a few domestic aero engine production plants, and because of historical reasons and the planning system were stipulated, the production of turbojets can only produce turbojets, and the production of turboshafts must honestly produce turboshafts.

In the face of this pattern, the R&D project teams of various aircraft can only hand over the power part to a certain classification factory for development in accordance with the instructions of the ministry.

But now it's different, jumping out of the freak of Tengfei Group, as long as it is related to aerospace, almost all of them are involved, especially in aero engines, completely jumping out of the ministry plan, the manufacturer's production of the mold, silently invested, hard research and development, and several series of gas turbine power units have been formed in a few years.

From this point of view, the research and development project team of the light multi-purpose dual-purpose helicopter is still waiting for nothing, and without thinking about it, the D-30-Z series turboshaft engine will be designated as the backup power of the light multi-purpose dual-purpose helicopter and will be sub-systematically approved.