This loud noise instantly startled the two of them, and General Lin said, "Driver, hurry, drive over!" ”

If it is an ordinary person, when he hears a loud noise, he should dodge, but General Lin is not, where is the danger, he wants to go instead, he wants to go to the front line, he wants to see what happened?

The driver heard General Lin's urging, and also accelerated the throttle, and went in the direction where the sound came from, what happened there?

I didn't find any broken glass, and I didn't see any damage to the building, which means that this sound should not be caused by an explosion, what is it? This is the test site of the fighter engine, and if you hear the sound here, it is the sound of the engine.

The sound of a normal engine is the high-frequency howling of a turbine, and the higher its speed, the louder the whine it emits, and if it is in front of an airplane, it is even more deafening.

However, this kind of explosion-like sound is different, listening to this sound is like firing a cannon.

"It's supposed to be the engine fire." Qin Feng said on the side.

In fact, the engine of the car also has the phenomenon of firing guns, and you can hear the sound of toms in the engine, and the firing of the car engine is caused by backfire, which is also called tempering.

Generally speaking, the ignition time of the engine of the car will be slightly advanced, when the combustion is the fullest, it is just when the power stroke begins, so that the force provided is the most powerful, but if this ignition continues to advance, then, the piston has not reached the top dead center, it begins to erupt, this is tempering, and in serious cases, the engine will even reverse.

In many cases, when the engine is slowly refueling, it may be normal, but when accelerating sharply, if the adjustment is not in place, it is easy to backfire and discharge.

The tempering of the car engine is so terrible that it may make the entire engine scrapped, and the engine of the fighter jet is even more terrible.

The engine of the fighter jet uses a turbojet engine, this kind of engine, also has a similar phenomenon, specifically, it is somewhat similar to the piston engine, mainly because the air flow is unstable when the air intake, for example, when accelerating rapidly, the air intake can not be supplied, and the high-temperature and high-pressure gas in the combustion chamber of the engine does not go out from the back, but jumps to the front, which causes a similar tempering gun.

This is serious damage to the engine, after all, the compressor in front is not so much of a capacity, and if this kind of problem is not solved, it can even lead to damage to the entire engine project!

At this time, both of them frowned, the ongoing project here is the turbojet-13 engine, this engine is very important, it is a major project of several projects in China, if this project goes wrong, then it will be a big trouble.

The car stopped outside the high-altitude platform, and before it could stop, General Lin stepped out, and behind him, Qin Feng also jumped down, and the two of them jumped into the room one after the other.

This is a huge workshop, as a high-altitude test bench, the engine is arranged in mid-air, in front of the engine, there is a special air intake, used to simulate the high-altitude airflow conditions, and in the back, there is also a special tail nozzle outlet, directly output to the outside.

The sound of the cannon just now must have come from here, because now, a group of experts here are arguing. "Our turbojet-13 engine is very important, and now that there is such a situation, it must not be released into the sky, what if the engine has this kind of cannon phenomenon in the sky?"

It was an expert from the 31st Institute who spoke, his hair was already gray, he was wearing thick glasses, he looked like an old pedant, the expression on his face at this time was very solemn, this is a scientific attitude, and now this problem has appeared, and it has not been solved many times, and it must not go to heaven!

"No, no, we have confirmed that not only our engines, but also the engines of the Soviets, there is also this problem, you can see clearly, now it is the P-13-300 engine of the Soviets, not our turbojet-13!"

The person who spoke was none other than Wen Lao, the chief master of Turbojet-13, who had already met Qin Feng when he was in Base 011 before.

Wen first studied in the Department of Aeronautics of Tsinghua University, then went to the engine major of Beihang University, went to the Soviet Union to study, and has been staying in the 011 base since the sixties.

It was under his auspices that the turbojet-7 engine continued to mature, and its life span increased from the initial 50 hours to the current 200 hours, and the imitation of the turbojet-13 engine was also grasped by him.

Now, this turbojet-13 engine is being simulated on the high-altitude platform at the 31st Institute, and this phenomenon of firing artillery is not the first time!

This engine, first of all, is intended to be installed on the J-7 3, this is a single-engine fighter, if this kind of problem occurs during the test flight, the engine fails, and it is likely that it will not be able to come back.

For this reason, it is absolutely impossible to allow an unqualified engine to be installed on an aircraft.

And now, the turbojet-13 engine is placed on the side, and the one that is tested on the bench is a matching engine that was brought over with the MiG-21MF!

Now it is the engine of the Soviets that fires the cannon, and the engine of the other side also fires the gun on this test bench, what is going on?

"General Lin, are you here?" At this moment, someone found General Lin and Qin Feng who came in, and someone immediately shouted.

"yes, I'll take a look." General Lin said, "I heard a loud bang, what's going on?" ”

Hearing General Lin's question, the old expert who opposed it just now immediately spoke: "Our engine is conducting high-altitude simulation experiments on the test bench, but the phenomenon of firing cannons has occurred, we believe that the engine is problematic and must not go to the sky!" ”

General Lin turned his head to look at Elder Wen: "Is that so?" ”

"This started half a month ago, our turbojet-13 engine, the first experiment here, the phenomenon of artillery firing occurred." Wen Lao said very patiently: "After that, we looked at this matter with a calm and scientific attitude, in order to find the cause, I proposed a solution to the problem, that is, our two engines were compared experiments, and now, the results of this comparative experiment have come out. ”