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Chapter 544 Light Multi-purpose Military and Civilian Helicopters

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    After listening to Lin Guanghua¡¯s words, Zhuang Jianye frowned subconsciously.

    The Ascendas Group does have a turboshaft engine now, which is the d-30-z series turboshaft engine based on the hx-4-1 core engine and derived from the improvement of the d-30 series gas turbine power unit.

    ?According to different processes, the d-30-z series turboshaft engines are roughly divided into three versions, with power ranging from 296 kilowatts to 554 kilowatts.

    At that time, Ascendas Aviation did not have any plans for a specific model of turboshaft engine. As the turboprop engine matured step by step, it wondered whether it could make use of the mature reduction gearbox, transmission mechanism, bearing combination and other components of the turboprop engine.  The control system, coupled with the derivative of the hx-4-1 core machine, is ready to make some in-depth improvements and convert it into a helicopter-specific turboshaft engine.

    Because it is of experimental nature, the benchmark model uses Tengfei Aviation Power's very mature d-30 series gas turbine power unit, hoping to accumulate experience for the future d-40 series or d-50 series conversion to turboshaft power.

    Because of this, the d-30-z series turboshaft engines have entered the substantive research stage a year ago. Originally, Tengfei Aviation Power was not in a hurry. It was an experimental nature anyway, a guinea pig for subsequent models, and it was solved.  Whether there are problems or not, the good and the bad should be put aside and digested slowly.

    So when it comes out, Ascendas Group is very Buddhist.

    However, after the ministries and commissions that received the notification learned about the specific parameters of the d-30-z series turboshaft engines developed by Ascendas Aviation Power, they immediately sent several expert teams to Ascendas Aviation Power to conduct inspections on the d-30-z series turboshaft engines.  Extremely detailed research and demonstration.

    The final conclusion is that the d-30-z series turboshaft engines are in line with the supporting power scheme for light multi-purpose military and civilian helicopters that has just been proposed in China, and will be supported in principle.

    It is a light multi-purpose dual-purpose helicopter with a long name, but it is actually the later Z-11 helicopter.

    In the context of the Z-9 being alone in the early stage, the Z-10 shining in the mid-term, and the Z-20 heading towards the beginning of a new era, the presence of the Z-11 helicopter is actually very low.

    But low does not mean unimportant. 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.

    Both helicopters are world-renowned light helicopters, especially the American Bell-206 series helicopters. They have derived many sub-models according to different needs, the most important of which are three. One is a passenger sightseeing model, and the other is a helicopter trainer.  machine, and finally the military model.

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

    The second type is simply the daily training of helicopter pilots and the adaptive training of go-around pilots. After all, the maintenance and use costs of light helicopters are relatively cheap, making them an ideal platform for helicopter training.

    The last and most important category is the light armed reconnaissance helicopter. The most typical one is the oh-58a "Kiowa" light armed reconnaissance helicopter, an improved model of the Bell-206 series helicopters.

    As the main component of the U.S. Army Aviation's rapid assault force, this helicopter forms a high-low and light-heavy low-altitude fire strike system with the ah-64 "Apache" armed helicopter. It is specially designed to fight against enemies that may break through the Iron Curtain in the European wilderness.  Soviet steel torrent.

    As for the effect, the Gulf War a few years later is the best proof.

    Of course, China cannot predict what will happen in a few years, but in recent years, it has introduced several French "Squirrel" series helicopters and American Bell-206 series helicopters through civil aviation, and they feel very good after using them.

    Especially the military, whether it is the Army Air Force that was recently established by the Army; or the helicopter unit of the Air Force itself; or the carrier-based helicopter unit that the Navy has begun to expand, all need a large number of helicopter pilots, and cultivating professional helicopter pilots will inevitably require professional  helicopter trainer.

    However, the lack of understanding in this area in the country resulted in the helicopter trainer aircraft remaining blank until the late 1980s. Compared with the complete fixed-wing trainer aircraft and training system, the gap was not small.

    What's more, light helicopters also play a very important role in frontline reconnaissance, armed assault, and fixed-point anti-tank. Especially after the Army Aviation Corps introduced the French "Antelope" light armed helicopter, it spoke highly of this flexible and lightweight helicopter platform.  I hope that there will be similar equipment in the country as an important force for aviation reconnaissance and ground-to-air anti-tank. After all, China is also threatened by the torrent of Soviet steel on its northern border.

    So it depends on many aspectsMotivated by the epidemic, theoretical demonstrations of light multi-purpose military and civilian helicopters began in 1986. In 1988, the basic structure was formally determined and turned into formal development.

    Like many domestic aircraft, the light multi-purpose dual-purpose helicopter also has power uncertainties. According to the plan of the development project team, the light multi-purpose dual-purpose helicopter uses a turboshaft imitating the French Arri¨¨ series turboshaft engine.  8.

    This turboshaft engine was introduced into the country along with the French "Dolphin" helicopter. Its overall performance is not bad and fully meets the needs of light multi-purpose military and civilian helicopters.

    However, the localization process has been stumbling. The light multi-purpose dual-purpose helicopter development project team has visited the turboshaft 8 production plant several times. Although the manufacturer was steadfast in its promise, several leaders of the development project team were still a little worried and had no choice.  We are all veterans in the aviation industry. Who has not experienced the embarrassing scene of waiting for an engine on an airplane?

    In order for the light multi-purpose military-civilian helicopter not to fall into the rut of the previous power system and turn a sketch into a boring and lengthy soap opera, other power alternatives must be available.

    This is also a common practice among the world's major aviation production giants. Take Airbus as an example. Their aircraft usually have three sets of power solutions, namely Rolls-Royce, Pratt & Whitney and General Motors. To put it nicely, this is called a backup plan.  The good thing is that you can't hang yourself from a crooked tree. Otherwise, I designed the aircraft and was preparing to seize the market, but found that the power was not available, and Airbus would have to cry to death.

    In the past, this condition was not available in China. After all, there were only a few aero-engine manufacturers in the country, and due to historical reasons and the planning system, it was strictly stipulated that the production of turbojet could only produce turbojet, and the production of turboshaft must be done honestly.  The vortex axes do not belong to each other, but they are clearly separated from each other, and they have a posture of never interacting with each other until death.

    Faced with this situation, the research and development project teams of each aircraft can only hand over the power part to a certain classification factory for development according to the instructions of the ministry. As for when it will be completed and installed on the aircraft to complete the finalization, only God knows.

    But things are different now. A freak like Ascendas Group has popped up. As long as it is related to aerospace, it is involved in almost everything, especially aerospace engines. It completely breaks out of the ministry plans and the stereotypes of manufacturer production. It invests silently and works hard on research and development.  Several series of gas turbine power plants have been formed in a few years.

    The development project team of the light multi-purpose military and civilian helicopter saw that what are they waiting for? Without a second thought, they designated the d-30-z series turboshaft engine as the backup power of the light multi-purpose dual-purpose helicopter and divided it into systems.  Project establishment.

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