The Russian engine is good and has always inherited the advantages of solid and durability! Qin Feng secretly thought in his heart that he was checking the various instruments without any problems.

In fact, there was no big problem at all. The engine was mature. The biggest problem might be in matching with the aircraft. However, only when the throttle lever is rapidly changed can the intake duct be inappropriately matched. As for now, everything is normal.

"The throttle opening is fifty!"

With the commands, the roar of the engine behind him became louder and louder, and Qin Feng was also in high spirits in front of him. Well, in addition to being a little louder, he would have known that he would have come over with a helmet.

"The throttle opening is seventy!"

"The throttle opening is ninety!"

When the throttle opening reaches 90, the engine is about to reach its maximum military thrust. The roar at this time amplified the entire hangar and resounded through the sky. The engine's tail nozzle can even see the heat flames surging outward. The most spectacular thing is the air inlet. The place where the air inlet is in the air inlet, under the strong suction force, it is clearly visible that the white mist is forming rapidly. At this time, if someone stands there, it will be sucked in in an instant!

During normal flight, the plane flies forward and the air crashes directly into it, so the engine can be fully powered, and even the force is no problem to be opened. However, during the ground interview, the accelerator opening is 90, which is the largest. In this case, the air intake is already running at full power, and the whistling airflow forms a huge vortex there, which looks quite spectacular.

"Slow train status!"

"Shut down!"

One by one, Qin Feng pushed the accelerator rod on the plane. Finally, the engine stopped. When the roar at the rear disappeared, Qin Feng felt that his ears were still buzzing.

The first test run was a complete success! The engine was assembled on the fighter. With different powers, no abnormal tremor, resonance, etc. of the engine were felt, and all verifications have been completed!

Qin Feng was also excited. He watched the screen turn dark, but he still didn't plan to come down.

At this time, the technicians had already started to conduct inspections. Some people checked the tail nozzle, some people checked the oil circuit, and some people crawled in through the air inlet.

The air inlet of the J-10 was like a big mouth. A technician crawled in from there, fired a flashlight, and started to show the situation inside.

"How is it, Xiao Liu?" Old Song asked with concern.

Xiao Liu crawled out of the inside, his face looked ugly, and said to Mr. Song: "Report, I found that the fan blades were damaged in many places."

"What?" Hearing Xiao Liu's report, Old Song's face suddenly became gloomy. Everyone present stopped talking and looked here.

What's going on?

"Let me take a look." Old Song stepped on the ladder and climbed up himself. Without having to get in, you can see from outside that under the flashlight, there were cracks in many fan blades inside!

This kind of air intake fighter with a belly can see the engine blades behind you from the air intake port. This air intake channel is the shortest and the most efficient.

When studying the J-8, we also conducted research on the air intake efficiency on both sides and the air intake nose. Even if the air intake on both sides is quite long, resulting in a large amount of air pressure loss. Now, this form of air intake is the highest efficiency.

Of course, there are also disadvantages. Since the fan blades can be seen directly, the fan blades will strongly reflect electromagnetic waves, and clear highlights can appear on the opponent's radar screen. Of course, this design is understandable without paying attention to stealth performance.

Now, you can clearly see the cracks on the fan blades. The first time I tested the engine, I scrapped one! Three million!

Of course everyone knows what this means.

The engine is from front to back, first of all the fan blades of the outer duct, then the low-pressure compressor, high-pressure compressor, combustion chamber, turbine, afterburner, and finally nozzle of the core machine.

Now, there are so many cracks in the fan blades. This is something you can see. Are there any damages in the blades of the low-pressure compressor that cannot be seen?

Now, the Al31F overhaul line that has been introduced in China can overhaul the engine in China. Even so, replacing these blades will be a considerable expense.

A test drive is so embarrassing!

"Let me see!" Qin Feng shouted. When he heard that there was something happening here, he immediately crawled out of the cockpit and stood outside the air intake. When he saw the tiny cracks, he immediately understood.

"It was collided by unnecessary objects!"

Air intake on the belly of the machine is conducive to maneuvering combat with a large angle of attack, but this air intake method will also approach the runway and easily suck debris on the ground. Therefore, the MiG 29 will open an auxiliary air intake on the side strip. When taking off and landing in field conditions, it is because it is afraid of sucking debris from the ground.

With the powerful power of the engine, the attraction near the air intake is quite strong, and the screws on the ground can be sucked into the engine.

But now, this is not the case at all. The ground has been cleaned up. Where did these extra objects be sucked in?

Then, Qin Feng reached in and stroked the seam at the edge of the air inlet. When his hand was taken out from there, everyone saw clearly that his hand was shiny.

"When we were processing the aircraft, did the metal chips be cleaned up in the joints? Under the powerful engine suction, they were pulled out from the gaps in the structure of the fuselage!" said Mr. Song: "I really didn't expect that it was because of our carelessness that led to such an accident!"

In the completely closed assembly workshop, everyone sweated heavily and finally completed the manufacturing of the aircraft. However, they did not expect that some metal debris were not cleaned up! After the third uncle-in-law's engine started, the attractiveness of the fan blades was also quite powerful, and they actually sucked out of the gap!

Fortunately, because it is metal debris, the damage caused is very small, which only hurts the fan blades. However, even so, it casts a shadow on the test flight of this fighter.

"We are engaged in R&D, and it is normal to encounter situations. Don't be discouraged or discouraged. Find the problem and then solve the problem!" Seeing everyone's condition, General Lin began to cheer up.
Chapter completed!