What was also incredible was Maxim, who was standing blankly on the edge of the grassland. It was fine if he landed incredibly, but he actually took off with the wounded and took off incredible ways. How far was the distance he had just slid?

Four hundred meters or five hundred meters?

But no matter it is four hundred meters or five hundred meters, as a light transport aircraft with a maximum take-off weight of 32 tons, it can be regarded as a miracle among miracles, so that the Yun-15plus had been flying away for a long time, and Maxim felt that he was sleepwalking.

There is no way, the scene I just saw has exceeded the coverage of his attempt, and I can only find the answer from the scriptures.

The problem is that the scriptures formed more than a thousand years ago cannot describe the current situation. Therefore, Maxim spent countless brain cells and found no answer. Finally, he could only look at the cold sky and silently said something suppressed for a long time: "What exactly did it do?"

"Yun-15plus uses an external blow-flap technology." Just as Maxim muttered to himself, a rough word suddenly came from behind him. Maxim looked back and found that Zarif, the former Pakistani military officer in China, also arrived here on the plane just now.

However, at this time, Zarif had already stepped down as a military officer in Pakistan to China and returned to China to serve as director of the Emergency Management Bureau of the Ministry of Internal Affairs of Pakistan.

Because they belong to the internal affairs department, Zarif and Maxim's old father are old acquaintances, and of course they also know the young local tycoon who once worked in the Bahrain Ministry of Interior.

Maxim didn't expect Zarif to come in person, and was slightly surprised. Seeing this, Zarif spoke and said, "You were too focused on luck-15plus just now, and it's normal for me not to notice."

"Uh..." Maxim was a little embarrassed, but he and Zarif were old acquaintances. He just continued the topic: "What external blowing flap technology did you just say about Yun-15plus? What is that?"

"This..." It was Zarif's turn to be embarrassed. This difficult term was known when he participated in the introduction of the Luxury Group when he first participated in the introduction of the Luxury Group. Later, he was transferred back to the country and transferred to the Ministry of Interior, which deals with domestic emergencies. Later, he did not participate in the introduction of Luxury-15plus, so he naturally did not know what the so-called external blowing flap technology is.

But 13 had already pretended to be out of here. If he showed his timidity at this time, where would he put his old face?

So he licked his big belly, his slightly dark face smiled, showing an expression that I didn't understand, and then said something that made Maxim wander around again: "What can it be? Of course it is very advanced technology..."

As he said that, Zarif lowered his voice seriously: "I heard that only Americans mastered this technology before, and even the Soviets couldn't understand it."

It would be fine if he didn't say this, but Maxim was full of questions. If Zhuang Jianye, who arrived in Peshawar with the medical team following the Tengfei, knew that he would definitely grab Zarif's neck without hesitation and introduce the product to the rich, how could he pretend to be 13 like this?

Only the Americans have mastered it, and even the Soviets don’t. Should I pretend like this?

Obviously, only China's Tengfei Group understands the external blowing flap technology best, but others just understand it slightly? This is low-key, luxurious, simple but not simple!

Of course, if Zhuang Jianye really said that, there would be no one around the world who dared to play the game. The reason is very simple. There are quite a few countries and aviation manufacturing companies that have studied external blowing flap technology, such as McDonald and Boeing in the United States; Antonov and Ileutian in the Soviet Union; Dassault, Bae in Europe, etc.

Among them, there are many people who have completed engineering verification machines, such as McDonnell and Boeing.

Some have also entered mass production. Antonov's An-72 short-range take-off and landing transport aircraft is the world's first mass-produced short-range take-off and landing transport aircraft.

But the only thing that truly applies this technology to the extreme and conforms to the convenient maintenance of modern aviation aircraft, simple structure and puts into mass production is China Tengfei Group's Yun-15plus.

Unlike another mass-produced An-72 transport aircraft with short-range take-off and landing, the Yun-15plus did not adopt the shoulder-mounted engine layout that was very popular in the US and Soviet aviation industry in the 1970s.

That is, the jet engine is placed on the upper part of the wing, and the "Kanda effect" is used to form a downward air conduction effect on the surface of the wing, thereby forming an upward reverse lift.

The description of the "Kanda Effect" theory here is boring, but the experiment is very simple. Using a soup to turn the arc surface above the flowing water. The flowing water changes the flow direction along the curve surface of the soup is the simplest Kanganda effect.

The An-72 transport aircraft and Boeing's engineering verification aircraft are both fans of the "Kanda effect" and have achieved unquestionable success. Both models can achieve normal take-off and landing on the meter runway under full load.

Based on this, the Soviet Union even once used the An-72 transport aircraft as a carrier-based early warning aircraft platform. In the early 1980s, the An-71 carrier-based early warning aircraft was developed. What it valued was the An-72 transport aircraft itself's excellent short-range take-off and landing capabilities.

However, despite its success, as the saying goes, success or failure, the shoulder-mounted engine layout can maximize the use of the "Kanda effect" to make it have the ability to take off and land at a short distance.

However, this layout also significantly limits the further development of this type of machine.

The reason is very simple. The adaptability of a fixed engine compartment is too poor, and only fixed-size engines can be used. If you want to replace the engine with better performance and a larger thrust-to-weight ratio, it is impossible to achieve it unless the aerodynamic layout is pushed down and redone.

In addition, the maintenance of the engine is also greatly increased. With the wing suspension layout, the maneuver staff can perform simple inspections of the engine with just a simple herringbone ladder.

However, the engine was carried onto the shoulders, and the crew had to climb along the fuselage to the wings before opening the engine cover for inspection, which invisibly increased the workload of the maintenance.

Finally, and most importantly, the aircraft with this type of layout lacks expansion capabilities. At best, it can only carry two engines. It is not impossible to increase to four engines. The key is that the structural strength of the wings must reach a very abnormal level. The key is that even if you do this, it is not cost-effective, because the weight of the aircraft is invisibly increased, which reduces the performance of the aircraft.

This means that the upward space of this type of aircraft is not large. It is very difficult to increase the length of the fuselage like a conventional aircraft layout, and expand the elasticity of the mission.

The above are important reasons why the United States was dismissed and the Soviet Union's An-71 carrier-based early warning aircraft was finally replaced by Jacques 44.

In contrast, the path of the Yun-15plus is much more flexible. Similarly, it is McDonald's. This model is unfamiliar to ordinary people, but another model that has been expanded on this model is well-known, which is the US military C-17 "Global Overlord 3" strategic and tactical transport aircraft that rewrites the rules of military transport aircraft.
Chapter completed!