The Russian engine is good and has always inherited the advantages of being strong and durable! Qin Feng secretly thought in his heart that he checked the various instruments and there was no problem.

In fact, there could not have been too many problems, the engine is mature, and the biggest problem may be in the matching with the aircraft, but only when the throttle lever is changed rapidly, the intake tract may not be mismatched, as for now, everything is normal.

"Fifty throttle opening!"

With the command one after another, the roar of the engine behind him became louder and louder, and Qin Feng was also in high spirits in front, well, except for the louder noise, he knew that he should have come over wearing a helmet.

"Seventy throttle opening!"

"Ninety throttle opening!"

When the throttle opening reaches ninety, the engine is about to reach the state of maximum military thrust, the roar at this time, so that the entire hangar is amplified, resounding in the sky, the tail nozzle of the engine, and even the heat flame can be seen surging outward, the most spectacular is the air intake, the place of the air intake, in the case of strong suction, it is clearly visible that the white fog is rapidly forming, at this time, if someone stands there, it will be sucked in instantly!

In normal flight, the plane flies forward, and the air directly hits in, so the engine can be turned on at full power, and even afterburner is no problem, but when the ground test car, the throttle opening of 90 is already the largest, in this case, the intake tract is already running at full power, and the whirring airflow, where a huge vortex is formed, looks quite spectacular.

"Slow Train!"

"Shut down!"

One by one, the passwords came, Qin Feng pushed the throttle stick on the plane, and finally, when the engine stopped and the roar of the tail disappeared, Qin Feng felt that his ears were still buzzing.

The first test run was a complete success! The engine is assembled on the fighter, and under different powers, I don't feel the abnormal tremor of the engine, resonance, etc., and all the verification has been completed!

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

At this point, the technicians have already started to carry out inspections, some people check the tail nozzle, some people check the oil circuit, and some people climb in through the air intake.

The belly air intake of the J-10 was like a big mouth, and a technician climbed into it from there, turned on the flashlight, and began to take pictures of the situation inside.

"How's it going, Xiao Liu?" Song Lao asked with concern.

Xiao Liu climbed out of it, his face was ugly, and said to Song Lao: "Report, I found that the fan blades were damaged in many places. ”

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

What's going on?

"I'll take a look." Song Lao stepped on the ladder and climbed up himself, without getting in, you can see it from the outside, under the illumination of the flashlight, sure enough, many fan blades inside have cracks!

This kind of fighter with belly intake can see the engine blades behind it from the air intake, and such an air intake is the shortest and most efficient.

When studying the J-8, it was also studied because of the efficiency of the air intake on both sides and the nose air intake, even if it was the air intake on both sides, the air intake tract was quite long, which led to a large amount of air pressure loss, and now the J-10, this form of air intake, the efficiency is the highest.

Of course, there are also disadvantages, because the fan blades can be seen directly, so the fan blades will strongly reflect electromagnetic waves, and clear highlights can appear on the opponent's radar screen, of course, now there is no emphasis on stealth performance, such a design is understandable.

And now, you can clearly see the cracks on the fan blades, and the first test run, an engine was scrapped! Three million!

Of course, everyone knows what that means.

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

Now, there are so many cracks in the fan blades, which can be seen and not seen in the blades of the low-pressure compressor, is there any damage?

Now, the overhaul line of Al31F, which has been introduced in China, can overhaul the engine in China, even so, it is not a small expense to replace these blades.

A test drive, so embarrassing!

"I'll see!" Qin Feng shouted, when he heard that there was a situation here, he immediately climbed out of the cockpit, and then also stood outside the air intake, and when he saw those tiny cracks, he immediately understood.

"It was collided with an extra object!"

The belly air intake is conducive to mobile combat at a high angle of attack, but this air intake method will also be close to the runway, which is easy to suck in the debris on the ground, so the MiG-29 will open an auxiliary air intake on the top of the side strip, and use the air intake above when taking off and landing in field conditions, just for fear of sucking in debris from the ground.

Under the strong 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 swept clean, where are these superfluous objects being sucked in?

Then, Qin Feng's hand reached in and stroked the seam on the edge of the air intake, and when his hand was taken out from there, everyone could see clearly, his hand was shiny.

"When we were processing the aircraft, did the joints have cleaned up the metal shavings, which were pulled out of the gaps in the fuselage structure under the strong engine suction!" Song Lao said: "I really didn't expect that it was because of our carelessness that such an accident was caused!" ”

In the completely enclosed assembly workshop, everyone sweated like rain and finally completed the manufacture of the aircraft, but unexpectedly, there were some metal chips that were not cleaned up! After the third aunt's engine was started, the attraction of the fan blades was also quite powerful, and it actually sucked them out of the cracks!

Fortunately, because it was metal chips, the damage caused was very small, and it only injured the fan blades, but even so, it cast a shadow on the test flight of this fighter.

"We are engaged in research and development, it is normal to encounter situations, don't be discouraged and discouraged, find the problem, and then solve the problem!" Seeing everyone's state, General Lin began to puff up.

"Yes, a comprehensive cleanup, a thorough investigation!" Song Lao said.