It is no wonder that the military observer from North Africa was so surprised, but the Y-17 overhead was equipped with a very different engine from the one two hours earlier.

It was a stout and short engine, not to mention these military observers who studied equipment and tactics all day long, even a layman here, as long as his eyes were not blind, he could see the essential difference between the new Y-17 and the narrow engine compartment of the previous D-30KP turbofan engine.

It is obvious that this new Y-17 uses a completely new engine, and it is a large bypass ratio turbofan engine that is far superior to the D-30KP turbofan engine of the former Soviet Union.

No way, the former Soviet Union's D-30KP turbofan engine bypass ratio is only 2.4, in the sixties and seventies when it was born, this index can only barely take the edge of the bypass ratio, not to mention the large bypass ratio, that is, the second-class high bypass ratio is far worse.

In the 90s, with the three major aviation development giants of General Motors, Pratt & Whitney and Rolls-Royce successively launched a new generation of large bypass ratio aero engines with a bypass ratio of more than 10, the D-30KP turbofan engine has lagged behind the times in other aspects except for the thrust.

But even the thrust that the D-30KP turbofan engine is proud of is nothing to praise, because it is at the expense of part of the maintainability, the life of the whole machine and the high fuel consumption.

Regardless of the rest, but in terms of the overhaul interval, most of the similar engines in Europe and the United States are about 10,000 hours, while the D-30KP turbofan engine is only a mere 3,000 hours, which is only one-third of similar products in Europe and the United States.

As the saying goes, the world knows the autumn of the world, which shows that the D-30KP turbofan engine is really not as good as imagined.

The military observers of various countries at the scene were all veterans in the circle, and naturally knew all kinds of disadvantages of the D-30KP turbofan engine, so when Norokov was ashamed to say that the Yun-17 adopted the D-30KP turbofan engine and was jointly developed with Russia, many people were surprised and frowned.

Because in the eyes of most people, the D-30KP turbofan engine is not a good choice, rather than this, it is better to use the aero engine on the large civil airliner, perhaps in field conditions, this kind of civil engine is not as professional as the D-30KP turbofan engine.

The problem is that countries around the world cannot be in a state of war, ordinary training is still the mainstream, and the characteristics of civil large duct thrust, fuel economy and easy maintenance can greatly reduce the cost of daily training in various countries, if so, there may be more countries that choose Yun-17.

Just when everyone was secretly sighing in their hearts, the Y-17, which was equipped with a large bypass turbofan engine, suddenly appeared from behind the snow-capped mountain as if it were a perceptual feeling, so that some military observers who were slow to react could not believe their eyes, thinking that they were dreaming.

So I rubbed and kneaded, and then looked into the sky, and found that the engine of the Yun-17 was different, and then it suddenly became clear that they were really "dreams come true".

The other military observers were overjoyed, but Norokov, who had just let out the big words, was embarrassed.

The reason why he gave up his old face and said that the Yun-17 was jointly developed with Russia was that he wanted to use this way of touching porcelain to coerce a certain big country in the East and let Russia get a share of the Yun-17 project.

You must know that military observers from various countries are enthusiastic about the Y-17, but Norokov sees it, and how can Norokov, who was a technical officer of the former Soviet Airborne Forces, not see the broad market prospects of the Y-17.

Not to mention other countries, even if Russia inherited the huge transport fleet of the Soviet Union, it is estimated that it will drool when it sees the Y-17, and there is no way that the aging rate of medium-sized transport aircraft such as the An-12 in Russia is more serious, so Russia's demand for medium-sized transport aircraft is not only not lower than that of other countries, but even more intense.

Because of this, Norokov was equally shocked when he saw the Y-17, but the next moment he made up his mind that the project had to be in the hands of the Russians.

This not only solves the problem of replacing the Russian medium-sized transport aircraft, but also makes a lot of money in the international market.

As for whether a certain big country in the East will protest against this kind of cunning and plundering like touching porcelain, Norokov did not think about it at all, the reason is very simple, he did not see that the Yun-17 uses the D-30KP turbofan engine made in the former Soviet Union.

What does this mean?

A large country in the East does not have a high-thrust aero engine to adapt to transport-17.

Think about it, the biggest power of a large country in the East on the transport aircraft is now only the WD-52ML turbofan engine with a thrust of 5.2 tons produced by Tengfei Group, and the two together are not as good as a D-30KP turbofan engine, after all, the thrust of the D-30KP turbofan engine has reached 12.5 tons.

If you want to leap from 5.2 tons to more than 10 tons, it may not be possible to understand it in 10 years at the level of a large country in the East, so it is equivalent to saying that a large country in the East is stuck in the neck on a high-thrust engine.

The problem is that their engines cannot be used by outsiders for military purposes, and since the West has no choice, they can only use their Russian products.

The only thing is monopoly, and monopoly can be high, and high up can do whatever it wants.

Because of this, Norokov's logic is very simple, I will blatantly touch the porcelain, what can a certain big country in the East do to me? Have the ability to bite me, but you have to think about it before biting, the D-30KP turbofan engine is the only one, so ...... Hey...... It's better to pose, don't resist, the fighting nation is still very gentle!

Which Cheng thought, the first one used the D-30KP turbofan engine of the former Soviet Union, and the second one that came in a blink of an eye was a new large-bypass ratio turbofan engine.

Low consumption, fuel saving, weight is much lighter than the D-30KP turbofan engine, more importantly, this large duct than the turbofan engine thrust is usually not low, at least with the D-30KP turbofan engine a level.

This not only made Norokov's plot to touch porcelain completely collapsed, but also made him embarrassed and couldn't get off the stage, no way, the previous words were too full, and now the second Y-17 flew over and slapped his face, what did Norokov say, is it difficult to admit that what he said just now was to touch the porcelain's bragging~~~ force?

It doesn't matter if this is in his own home, the key is in front of military observers from various countries, and many of them are the little brothers of the former Soviet republics, if the Russian big brother confesses, his own not too tall image will inevitably further shrink in the hearts of these little brothers.

So Norokov rolled his eyes, his heart was horizontal, and he coughed twice to relieve the embarrassment, and then pointed to the Yun-17 that was falling on the runway and said with a smile: "I really didn't expect the latest facelift of the Yun-17 to use our latest Russian PS-90 turbofan engine, haha, that's the high-thrust engine equipped with the Russian presidential plane......"

"Hey~~ Norokov, let me correct it, the newly arrived Yun-17 uses our purely domestic WD-60ML large-bypass ratio turbofan engine, and I have never heard of any PS-90 turbofan engine. ”

Before Norokov's words were finished, a slightly hoarse voice came from behind him, and he forcibly interrupted Norokov's words of forcibly pretending to ~~~.

Everyone followed the sound and saw that Zheng Quanli didn't know when he had come to them.