"The MZ-2200 core engine has excellent performance, according to the initial capacity of this core machine, even if you want to design a 2500 or even 3000 horsepower turboshaft engine, there is no problem at all, but we think that what is needed in China now is not this level of engine, because 2200 horsepower is just enough. We can leave enough room for upgrades, and we will not design the engine load too high, which will help our engine to extend its service life and be able to have a better response speed, a series of benefits that are achieved by reducing the power of the guò engine. ”

Pointing to the photo of the MZ-2200 engine model on the screen, Chief Engineer Yin continued to introduce it, completely ignoring the consternation in the audience.

Thinking about it, the domestic re-start is not enough power output, so it will choose to overdraft the comprehensive performance of the engine in exchange for stronger output, which is already a very old habit, and it is also easy to bring to the new engine design, which is somewhat similar to the United States when the development of F-100, regardless of anything, what is needed is the engine output strong power at the same time, but also 8 levels of thrust-to-weight ratio.

This kind of requirement also led to the high accident rate of the F-100 engine in the early days, and only ten years later gave the GM F-110 engine the opportunity to counterattack, and GM's F-110 engine also relied on its own reliable and excellent comprehensive performance, and finally won the love of all parties, and the price was that there were some compromises in the thrust-to-weight ratio of the engine, and it could not be compared with the F-100.

It has to be said that the aero engine in the new era has passed the time when it is simply to compare thrust and output, and the comprehensive performance of the engine in all aspects must be taken into account.

"Of course, we are talking about sacrificing part of the output power, naturally because we don't need the output of up to 2500 or even 3000 horsepower now, 2200 horsepower is enough for us to use, I believe that the army also welcomes a product that can have good comprehensive performance to launch and put into service, which is the core idea of our research and development of MZ-2200."

As soon as the words fell, everyone began to discuss, and there were both between the branches of the armed forces and between the different branches of the military, which seemed quite interesting.

"Mr. Yang, it seems that the army has some other ideas, it seems that this time it is a little tricky!"

Looking at it again, it turned out that Chief Master Shen, who was sitting next to him after coming down just now, was talking, which can be explained: "Don't worry, the output power of 2200 horsepower is enough to use, after all, the height of our straight 8 this time has been cut by nearly 1 meter, and the height of the cargo compartment has been cut by 70CM, which leads to a small decline in the transportation space of the aircraft, so it is enough to maintain the original total power of 4400 horsepower, I believe the army will understand this." ”

Chief Shen actually doesn't believe it in his heart, as far as the domestic army is concerned, will they choose to give up the output power of the engine and pay attention to the comprehensive performance of the engine? It doesn't feel like it's easy to believe.

And the next moment, the cruel truth was told to Chief Master Shen, and the army really agreed to the overall design idea of the MZ-2200 this time, and it was the army aviation that was the first to stand up this time.

"It makes sense, 2200 horsepower is indeed enough for us to use, and the plateau transport flight is not a problem, so no longer the pursuit of high output power, but to pay attention to the comprehensive performance of the engine is indeed a very necessary development direction, at least when we use the turboshaft 8 developed in France, the excellent comprehensive performance has given us a very deep impression, it is indeed time to change the traditional old thinking."

Even the army aviation agreed to this, and the navy and air force, of course, did not pick any more thorns, and the plan report continued.

"Since the new Z-8 is going to redesign the powertrain, we naturally chose to change the engine to a more suitable side-mounted geartrain for the deceleration drivetrain, with an expected height of 0.5 meters. The width is 0.65 meters, which is slightly smaller than the old turboshaft 6, and the length of the engine is expected to be about 1.5 meters, although it does not control the length of 1 meter like the T-700 engine, but it is also much better than the length of the turboshaft 6 and BT-117 engines of 2 meters, and I believe that there is no problem at all with the new straight 8 aircraft. ”

At this time, the situation is a little interesting, I didn't expect the size of the engine to be a bit long, compared with European and American engines, is it a little too long? For a while, all kinds of whispers began.

"If you want me to say, this 1.5 meters is not a little too long, the RTM-322 engine developed in Europe in 80 years is also at the level of 2200 horsepower, but the length seems to be only 1.1 meters, so this is not good to need again"

"Pull it down! You also know that this is a project that began in Europe in 80, and the 322 engine was finalized in 87 years, which represents the most advanced level in the field of turboshaft engines in Europe, and Europe still needs to be 1.1 meters long, we are not as good as others in all aspects, and now the comprehensive performance is good enough, the power is also 2200 horsepower, and the engine volume is longer It is understandable, so don't make such high requirements. ”

After hearing this explanation, it seems that this is indeed the case, and this engine is not also reserved for the future power increase A lot of margin, so it should have such a length, 1.5 meters is also 1.5 meters.

There was a decision at the moment: "Agreed, although the length of 1.5 meters is a bit long, but it is also bearable for use in helicopters, and the future upgrade and development space of this engine is definitely greater than that of T-700 and RTM-322 engines, I think the extra 0.4 meters in length is worth it." ”

The biggest problem has been agreed, and the subsequent introduction of the design details of this engine is much simpler, all kinds of numbers jù because of the previous compromise in power, so they are still very good-looking, every time a good number jù comes, it can also cause a burst of high on the scene. Tide.

"Finally, our design ideas for the MZ-2200 engine are also here, because we already have a mature and reliable core machine, and it has also taken two years to carry out model pre-research and design, so the progress is already very good, probably next year we can have the first prototype put into operation and testing, 94 years to be able to provide the new Z-8 test flight, 95 years of complete finalized production."

As far as the development speed reported now is concerned, in fact, it is not much different from the time required to develop a turboshaft engine in Western countries, RTM-322 took 7 years, T-700 was born relatively early, it took about 9 years, and MZ-2200 took 8 years to complete the development work from the 88 years of the development of the core machine.

However, such a research and development progress is enough to be satisfactory, and it can almost coincide with the research and development test flight progress of the new straight 8, as for the heavy armed helicopter project, think about it should be to wait until the new straight eight research and development finalization to see if it can be launched! Now that the threat from the north has been lifted temporarily, it seems that the heavy anti-tank helicopter gunships do not need to be urgent, and they should first concentrate on making the new Z-8 a good job.

"We are very satisfied with this engine, and the design scheme of the new Z-8 is also very good, which fully takes into account the key needs of the army and the country, so the army aviation initially decided to invest 250 million yuan in this project, of which 150 million is the special use of the MZ-2200 engine." (To be continued.) )