Then, Wang Bin, Professor Cha and everyone soon came to a special house built by Wang Bin and Tiangong technology special glass not far from the workshop test bench. If someone looks carefully, they will find that the thickness of each glass in this house made by Tiangong technology special glass has reached 30mm.


    It can be seen from here that the defensive power of this room is actually for the safety of these staff in the workshop. After all, this is the test run of aeroengine. Once there is any accident, it is very fatal.


    Not to mention anything else, just take the various blades of the aeroengine. When the engine is in trial operation, the speed is very fast and the centrifugal force is also very large. Once the blades fall off, the damage caused is very terrible. Once you encounter people, the result is self-evident, not to mention other accidents.


    When everyone entered the room, the people in the room began to shut down automatically, and various facilities in the room began to operate automatically, such as exhaust and ventilation system.


    In addition, the glass facing the front of the test bench also began to emit a trace of light. At the same time, various lines appeared around the engine, as well as the current state data of the engine, etc.


    Yes, the glass facing the engine is not just a transparent glass. In fact, there is a large transparent display screen and a large ultra-thin transparent display screen made by Qin''s industry in the middle of this glass.


    Of course, the glass of this display screen is still made by Wang Bin and Tianyuan optics under Tiangong technology, and the display technology is Qin''s own technology.


    Before long, all kinds of equipment in the room had been started. At the same time, all kinds of windows in the commissioning workshop began to close with the help of electric equipment and covered with a cover plate.


    Finally, the lights in the workshop began to darken, and soon the workshop became very dark. However, due to the darkening of the workshop, various data and lines on the transparent glass in front of Wang Bin''s room became unusually clear.


    "Mr. Wang! Can we start the test run?" when Wang Bin looked at the data on the front glass, the professor poked at Wang Bin and asked him.


    "Let''s start!" Wang Bin nodded to Professor poke and said!


    After listening to Wang Bin''s words, Professor poke said to the controller: "Xiao Jia! Start the test drive!"


    "OK! Poke Professor!" with that, the young man named Xiao Jia immediately pressed the test start button.


    With Xiao Jia''s action, the engine on the test bench began to start slowly.


    Of course, all the professionals present except Wang Bin naturally know that this is not the engine itself rotating, but the power equipment on the test bench is driving the engine to rotate and accelerate the engine to a certain speed so that the engine can ignite.


    With the passage of time, the engine speed on the test bench gradually becomes faster, and there is no abnormal data in the detection data of the display screen.


    At this time, several young testers who really observed the engine data began to report the test run.


    "The test run starts normally and the engine turns normally."


    "Engine rotation data is normal!"


    "Engine vibration data is normal!"


    "... normal!"


    "... normal!"


    With the report from the tester, Wang Bin, Professor Zhang and others looked very good. Although it was said that it was only the test bench to drive the test, there was no doubt that this was the first step to success. If even this step could not pass or there were problems, let alone the later. Fortunately, everything is normal now, which relieved everyone.


    "Start fuel input to the commissioning target."


    After the test bench report, Professor Zhang ordered again.


    Although the sound of the engine test run is very loud, in general, even face-to-face, you may not be able to hear each other''s speech.


    But it is different in this room. Since this room has considered this problem at the beginning of construction, although the sound of the engine can be heard in this room, it is not very big.


    "Fuel input normal!"


    "The target is running normally!"


    "Target speed is normal!"


    "Target internal normal!"


    With the sound of the engine running report, soon, Professor poke finally gave the order to ignite.


    "Fire!"


    "I see! Fire!"


    With Professor Zhang''s order, the operator of the test bench immediately pressed the ignition switch, and a low scream came from the engine on the test bench. Even in this room that has been strictly soundproofed, it can be heard.


    "The target enters the idle state! The operation is normal!"


    "The target speed is 20%, accelerating, and the speed is normal!"


    "The target output power is 2%, slowly increasing, and the power output is normal"


    With the gradual increase of the engine speed, the engine output power soon reached 5% of the theoretical maximum output power and began to maintain at this speed!


    In this way, after the engine was stably maintained at 5% thrust for more than ten minutes, Professor poke found that there was no problem, and then he said again: "increase the speed and enter the cruise working state."


    "Yes!"


    “.....”


    With the almost perfect passing of each process of the test run, the faces of Wang Bin, Professor poke and others were full of smiles.


    Although the first test run of the engine at this time is not over, anyway, the engine test run can come here, which has proved that the design of this engine has no fatal defects, at least it is feasible.


    Of course, whether the specific performance of the engine can meet the design requirements depends on the subsequent test run and more test runs in the future!


    With the engine test items going on one by one, finally after a series of test runs, the test reached the final test. If the final test items are normal, today''s test can be said to be perfect. At the same time, the final test is also a major test for the aeroengine on the test bench.


    Because the final test is the maximum working state test of the aeroengine, that is, the afterburner working state of the aircraft during flight. This working state is a great test for the state of various components of the aeroengine, and it can even be said to test the limits of various components of the engine.


    Of course, under the maximum working state, the combustion temperature inside the engine will continue to rise until it reaches the limit that the engine can withstand. At the same time, the pressure inside the engine will also reach the limit that the blade can withstand. This is why Professor poke said that their special high-temperature resistant glass of Tiangong technology, The reason why it can''t be used on turbine blades.


    Although the special high-temperature resistant glass of Tiangong technology also has very strong high-temperature and high-pressure resistance, the high-pressure resistance at high temperature is not the professional attribute of this high-temperature resistant special glass.


    If it is feasible to use special high-temperature resistant glass under normal circumstances, that is, under the cruising state of the engine, their special high-temperature resistant glass can never bear under high temperature and high pressure.


    As the engine enters the maximum working state, the sound of the engine becomes more and more sharp. At the same time, Wang Bin and they can clearly see Mach rings on the flame emitted by the engine.


    At the same time, on the transparent display screen in front, the thrust of the engine was also rising rapidly, and soon exceeded the maximum thrust on the original drawing, that is, the thrust of 120 kn, and finally stopped at the maximum thrust of about 139 kn.


    However, just when Wang Bin and others were happy and thought that the test run was about to be successfully completed, they suddenly found that there was a new change in the thrust data of the engine, that is, the thrust of the engine fluctuated greatly.


    Seeing this situation, both Wang Bin himself and Professor poke and others are worried. Wang Bin and Professor poke and others know something bad. There must be a problem inside the engine. Otherwise, the thrust of the engine will not happen.


    So Professor poke immediately made a quick decision and shouted, "stop now!"


    When the controller heard what Professor poked, he didn''t dare to be careless. He immediately pressed the stop button. Just after the controller pressed the stop button, the flame behind the engine also disappeared, and the sound of the engine began to change.


    After the controller pressed the stop button, it took five or six minutes for the engine to stop completely.


    After the engine stopped running, there was no sound in the control room for a long time. Even Professor poke and others lowered their heads, thinking about what problems had occurred in this test.


    After all, this is the first test run of their first aeroengine manufactured by Tiangong technology, but now! Now there was a problem during the first test run, and the mood of everyone in the control room can be imagined.


    Just when everyone was feeling a little depressed, Professor poke raised his head and said to the controller on the side, "we have replayed the video of the monitoring record of the last maximum power test just now."


    As Professor Zhang''s words fell, the picture of the maximum power test of the engine just now reappeared on the front transparent display screen, and all the engine data also appeared on the display screen. At this time, everyone did not pay attention to the picture of the engine, but focused on the test data on the display screen.


    As the time went by, everything in front was very normal. Soon, the screen reached about three minutes and sixteen seconds to start the maximum output power test, that is, about ten seconds before the thrust fluctuation.


    At this time, Professor Zhang found from the data on the screen that the temperature of the front bearing of the engine turbine has reached a very high level, far exceeding the level at the normal maximum output power.


    Seeing this, the professor has made a general judgment that there should be a problem with the engine bearing or cooling system.