Although Director Feng's tone sounded like criticism, everyone understood that this was criticism, and this was praise.

Wang Dazhi naturally understood, so he touched his head and laughed embarrassedly.

Wang Dazhi smiled, and the other comrades accompanying him also laughed.

When everyone was almost laughing, Director Feng continued: "Xiao Wang, how long do you estimate it will take for your engine to be completely finalized?"

"Director, in fact, many of the technologies of this engine are mature technologies, and all we need now is time," Wang Dazhi hurriedly said: "If everything goes well and develops step by step, it should be about the same in three to five years, that is, before 2008." ”

"That's right," Director Feng nodded when he listened: "I understand what you mean, this is the situation where everything is going well, but what is the main aspect of this unhappiness?"

"This is mainly reflected in the fact that we do not have a suitable engine high-altitude test platform," Wang Dazhi immediately explained to Director Feng: "Director, simulation is simulation after all, but whether the simulation results are correct or not, this still needs to be verified by practice, but the problem now is that we lack an excellent engine high-altitude test platform." ”

Director Feng frowned and turned his head to look at his secretary: "This, I remember that we don't have a high-altitude platform in Qinling?

As early as the 60s, our country developed an engine high-altitude test bench based on the H6 bomber, which was modified from the H6 bomber and made a great contribution to the development of our aero engine, but in 1996, this high-altitude platform was decommissioned.

However, very early on, our country realized the importance of the aero-engine high-altitude simulation platform, and as early as 1965, the country built China's first aero-engine high-altitude simulation test bench in the Qinling Mountains, and the construction of the engine high-altitude simulation test bench was extremely responsible, and it took 30 years until 1995, when the aero-engine high-altitude simulation test bench was built, passed the national acceptance and use.

From the time when this aero-engine high-altitude simulation test bench was put into use, it can be found that the aero-engine high-altitude test bench modified with the H6 bomber was forced until the high-altitude aero engine simulation test bench in Qinling was put into use before it was retired.

As for why there is a high-altitude test bench for aero engines modified from H6 bombers, the country has to spend huge sums of money to build such an aero-engine high-altitude simulation test bench in the Qinling Mountains, and the biggest reason is the lack of performance of the flight platform.

We all know that since it is a platform, the engines that need to be tested on this platform are not one or two, from the medium bypass ratio and large bypass ratio engines used in subsonic transport aircraft and passenger aircraft to the turbojet and turbofan engines used in fighter jets, all of which must be tested on this platform.

However, the flight performance of the high-altitude platform modified from a bomber or transport aircraft is actually very limited, and under normal circumstances, it can only simulate a flight altitude below 11,000 meters. Engine tests with flight speeds in the Mach 0.85 range, but in modern times, fighters equipped with military small-bypass turbofan engines and turbojet engines can usually fly at altitudes of 25,000 meters or even 3,000 meters, while flight speeds can be as high as Mach 2.2 or more, and this performance range is obviously beyond the scope of the platform, that is, there is a test that wants to be part of the high-altitude test bench modified with bombers or transport aircraft.

What to do?

There is only one way, to build an aero-engine high-altitude simulation test bench on the ground, and to test the performance of the engine by simulation on the ground.

Of course, there are many advantages of testing on the ground, one of the biggest benefits is that if a problem is found during the ground test, it can be adjusted quickly, and if there is a problem in the test on the aircraft, it will be a big trouble. If the old engine is tested with a new engine, it will undoubtedly greatly increase the flight danger, and the test pilot will need to take the risk of testing, and the high-altitude platform will not be used.

As for the other benefits, we won't talk about them, but there are many benefits in short.

The high-altitude simulation test bench of aero engines built in Qinling is also very advanced, and the maximum thrust of aero engines below 200 kN can be tested.

Director Feng knew this, so he was a little puzzled by Wang Dazhi's question.

Wang Dazhi explained in a low voice: "Director, actually...... The idea is that we will ourselves retrofit an engine high-altitude test bench with a transport aircraft. ”

Director Feng's eyes widened: "What?!Are you going to build a high-altitude platform?"

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PS: Sorry brothers, please wait a few minutes.

However, the flight performance of the high-altitude platform modified from a bomber or transport aircraft is actually very limited, and under normal circumstances, it can only simulate a flight altitude below 11,000 meters. Engine tests with flight speeds in the Mach 0.85 range, but in modern times, fighters equipped with military small-bypass turbofan engines and turbojet engines can usually fly at altitudes of 25,000 meters or even 3,000 meters, while flight speeds can be as high as Mach 2.2 or more, and this performance range is obviously beyond the scope of the platform, that is, there is a test that wants to be part of the high-altitude test bench modified with bombers or transport aircraft.

What to do?

There is only one way, to build an aero-engine high-altitude simulation test bench on the ground, and to test the performance of the engine by simulation on the ground.

Of course, there are many advantages of testing on the ground, one of the biggest benefits is that if a problem is found during the ground test, it can be adjusted quickly, and if there is a problem in the test on the aircraft, it will be a big trouble. If the old engine is tested with a new engine, it will undoubtedly greatly increase the flight danger, and the test pilot will need to take the risk of testing, and the high-altitude platform will not be used.

As for the other benefits, we won't talk about them, but there are many benefits in short.

The high-altitude simulation test bench of aero engines built in Qinling is also very advanced, and the maximum thrust of aero engines below 200 kN can be tested.

Director Feng knew this, so he was a little puzzled by Wang Dazhi's question.

Wang Dazhi explained in a low voice: "Director, actually...... The idea is that we will ourselves retrofit an engine high-altitude test bench with a transport aircraft. ”

Director Feng's eyes widened: "What?!Are you going to build a high-altitude platform?"