Chapter 1552 Improved Engine Continued

This engine, from the inside to the outside, from the turbine impeller to the tiniest screw, including the control chip, is all domestically produced. More importantly, all materials, from the turbine shaft material to the one-piece impeller material, are all domestically produced. Even all the designs were optimized by domestic technicians on the basis of the Black Hawk engine. Except for the most basic principles, they have already been changed completely differently.

It can be said that this is a purely domestic product. In formal language, this is a domestic turboshaft engine with completely independent intellectual property rights.

More importantly, the design performance of this engine is so excellent, people are full of unlimited expectations.

The Black Hawk engine itself is the leading helicopter engine, with excellent plateau performance. Not only is it equipped with the Black Hawk series of helicopters, but it is also the core power of the Apache gunship. Compared with the T700-GE-701C Black Hawk helicopter, the power of this engine is 50% higher than that of the 1341 kW, the weight is reduced by 20%, the fuel is saved by 25%, and more than 50 sub-components are reduced. .

Intuitively, using this engine on a Black Hawk helicopter increases range by 161%. Payload more than doubled. Likewise, the Apache's improvements are equally jaw-dropping, with the new engine increasing its range by 115%. Ultimately, the new engine could mean 10 more fighters or 93 more shells on the Black Hawk, and 79 minutes more flight time on the Apache.

It can be said that the performance of this engine will surpass all the existing engines in the world by leaps and bounds, and it is no exception to describe it as the world's number one with the same specification. If our Wuzhi 10 can use this engine, I am afraid we have to face an embarrassing situation, that is, the design performance of the helicopter itself is far from being able to give full play to the performance of this engine, so we have to redesign it, or design another one. A better gunship or utility helicopter.

However, these are expected performances, all of which are based on the fact that the engine successfully meets the design performance requirements. The success of ignition is the basis of all this. Now that the ignition is successful once, it means that the most important step has been taken.

Everyone was excited, and their eyes were all focused on the engine that seemed to be running normally, watching without blinking, and no one wanted to look away.

The engine runs smoothly without changing the power, without any abnormality. It was not until 30 minutes later that Zhao Yanyan closed it again.

The overall test is a rigorous and complicated process, which is very cumbersome. You must know that the stable operation of the engine is related to the performance and safety of the helicopter in the sky, and no one can be careless.

For this test, in addition to the hard work of Guo Tailai and Zhao Yanyan, the entire design team, test team and maintenance team started preparations a few months ago to ensure that the engine can be ignited on the ground test platform as soon as it arrives.

The test steps are very cumbersome, normal ignition, smooth operation, whether there will be any problems with increasing or decreasing the "throttle", whether it can support ten minutes, thirty minutes, one hour, three hours or even longer. After each test, a full maintenance inspection is required to see if there is any deformation of the turbine shaft, whether there are cracks in the impeller, whether the creep during operation is reasonable, and whether it has affected the overall performance. Every step must be very careful and strict. for inspection.

This is still a test run on the ground. In addition to testing the stability of the engine, a performance calibration test is also required to test the continuous power, intermediate power, emergency power, maximum continuous fuel consumption rate, intermediate fuel consumption rate, and power-to-weight ratio. , turbine inlet temperature and a series of parameters.

During the engine test run, various emergencies such as engine turbine blade breakage, blade breakdown through the casing, engine oil leakage, and test circuit failure may also occur. All of these require on-site adaptability and quick response, and a strong maintenance team is also very necessary. Fortunately, this team has started to practice with models a long time ago, and they can stand up at any time.

Possible failures also require a large test space and a sufficient safety distance. This is also one of the main reasons why Guo Tailai's studio cannot be used as a testing place.

In addition, for each inspection test, the accumulated life should be recorded. Although the material has been tested for a long time, the cumulative service life can reach thousands or even tens of thousands of hours without any problems, but in practical applications, it is still necessary to record the cumulative service life. This test cannot be calculated and estimated. 10,000 hours, then you have to rely on 10,000 hours of operation to draw a conclusion. No other calculations and estimates are as convincing as this one. Of course, it is usually determined by the long-term test program, the bench and the field 1:1 hours. There are other methods, but they all require a long test to calibrate.

This alone shows the gap with foreign countries. The cumulative service life test of 10,000 hours, even if it is turned up and down, will take more than 400 days. But is it possible? It is obviously impossible. Each test is at most a few hours and dozens of tests. After the test, it will stop and enter the half-disassembled maintenance and inspection state. Even if the average test is three hours a day, it will take three thousand three hundred and thirty-three days to get the result. This conclusion, more than nine years. Or double the test time, six hours or even ten hours of high-intensity tests a day, it will take at least three years.

That is to say, to launch a new engine, which claims to have a lifespan of 10,000 hours, it will take several years from the beginning of the engine's operation to the conclusion of its lifespan. Why do foreign aero-engines have advantages over domestic ones? They have several decades more start-up time than us, and the stable operating life alone needs to catch up.

"Sixty minutes of continuous running time!"

"Continuous power less than 30 minutes, 2000 kilowatts!"

"Continuous power, 1860 kW!"

"Emergency power, 2170 kilowatts!"

"Continuous fuel consumption rate..."

...

After maintaining the half-disassembled machine and checking that everything is normal, install it again and start it up, start connecting the test instrument for testing, and the data of each item will start to be released. With each piece of data released, the enthusiasm in the hearts of design and testing personnel will increase by one point, which also means that the distance from success will be one point closer.

The things Guo Tailai made with his own hands were really extraordinary. At the beginning, everyone was cautious, but after two days of careful testing with simple materials and component test reports, everyone found that this engine was really powerful. After a simple communication between Zhao Yanyan and Guo Tailai, they decided to increase the intensity of the test and extend the test time every day, trying to get the data of the ground test car as soon as possible, and then enter the field installation test stage as soon as possible.

A week later, the test data of the preliminary ground test bench has been released. Except that the operating life has not yet been calibrated, it has completed three consecutive 15-hour trouble-free operations.

The preliminary test report was sent to the General Assembly General Chu at the first time. After seeing this report, General Chu couldn't sit still immediately.