Chapter 2079: Power system test

Qin Guan's proposal opened up a new way of thinking for them. If they can perfectly solve the problem of the molten deck and greatly increase the range, what are the shortcomings of their VTOL aircraft?
Thanks to the people of Han, their research on vertical take-off and landing aircraft is so thorough, even better than their own! Shuchikov looked at Mr. Gu and the others around him and admired them with a thumbs up, really amazing.
The attainments of the Han people are very deep.
Now, everyone is heading towards the workshop of the test car. At this time, Dongdukov has begun to give a brief introduction.
"Now, our two teams have worked together to create a new power system, and the final experiment is in progress. If there is no problem with the experiment, it will be installed on the plane and flight test." Dongdukov's voice , And soon was drowned in the roar of the engine.
If nothing changes, the Yak 141 has already undergone a prototype test flight, but the improvement of the entire power system has delayed its test flight.
Now, when he walked into the test workshop, Qin Guan's eyes suddenly brightened. This thing is very similar to the F-35's power chain!
Behind is the main engine, the R79 engine developed by Xiong Guo. The thrust-to-weight ratio of this engine is not very high, but its power is very strong. After all, this is 150 kN power!
Later, when the country of Xiong disintegrated, it was discovered that there was no suitable engine when developing a new aircraft. At that time, some people wondered why not use this R79 engine!
Its thrust is close to that of AL41, and AL41 has not been successfully developed at all. It can only come up with an engine like 117S that uses AL41 technology to improve AL31, so why not use R79 directly?
There are of course many reasons. Although this engine has strong thrust, it also has a large weight. It is said that the thrust-to-weight ratio is less than 7, which is not as good as the third-generation engine, not to mention the power of the fourth-generation machine. It's an engine with a thrust-to-weight ratio of 10.
Another aspect is the competition of the engine design bureau. In the end, only Saturn won. After all, they have the basis for the export of Su-27. Al31 engines are in short supply. Other engine design bureaus can only eat dirt. It was merged and became a consortium. According to their plan, of course, it was their own Saturn project first. Other, useless projects should be thrown away.
As for Han Guo using R79 technology to research the turbofan-15, that's what everyone says. No matter what new project in Han Guo, there are always people who want to find a copy of them. It's like the J-10 is a copy of David. The same is true of human lion fighter jets, this kind of statement, as long as you understand the military aircraft development process, you know that it is impossible.
Now, behind is this R79 engine with vectoring nozzles, and in front is a vertical fan, which is connected by a shaft in the middle. At this time, the shaft is rotating at high speed, transmitting huge power roaringly. .
"It has been in continuous operation for more than 50 hours, and it proves that there is no problem with the processing of this drive shaft." Mr. Gu said on the side: "We used the equipment of the Northern Heavy Truck Factory to process with materials provided by Xiong Guo. It perfectly meets the design requirements."
At the beginning, everyone was worried about the processing of this drive shaft. After all, this thing needs to transmit tens of thousands of horsepower. It needs to be fine and high in accuracy. Xiong Guoren himself cannot do it.
However, Xiongguo's high-strength materials, coupled with Han's high-precision processing capabilities, have been made.
"Under the large thrust test, the rear can provide 14.5 tons of thrust, and the front can provide about 7.5 tons of thrust." Shuchikov followed and introduced: "This way, it is completely enough for our Yak 141 test. As long as the current power After the system is verified, it can be installed on our plane."
They also have to hurry up. When the new aircraft carrier is built, how many times will they fly up. What if they are caught by the navy?
After all, the Navy now has a group of pilots flying the Yak 38. If you change to this Yak 141, you will definitely be familiar with it.
According to the original plan, the rear engine provides 15 tons of thrust, and the front two lift engines provide 8 tons of thrust. Now, this engine directly drives the front lift fan, resulting in power loss of the main engine. Reduced to 14.5 tons, plus the 7.5 tons of the front lift fan, this seems to lose a ton of thrust compared to the original design, but at the same time, after adopting this design, it also greatly reduces its own weight. The two lift engines Replaced by a lift fan, the weight is reduced by half a ton, plus it can save a lot of fuel, which is definitely affordable.
Originally, two RD-41 lift engines were used, each with a thrust of 8 tons, and two were used. At the same time, the weight of this thing is only 290 kg, which is the dry mass. So, if you put it together, the thrust of this engine Compared to the 14 which is against the sky, it is simply a black technology, even the F22 engine is not so high.
Of course, this is at the expense of life. The life of this engine is only tens of hours. Of course, the lift engine is only used during take-off and landing, and each time is a few minutes, so the life span of these tens of hours, It's been enough to fly for a few years.
There is not much savings in weight. The main savings are structural weight, fuel weight, etc., and it can perfectly solve the problem of smelting decks. This is the most critical.
"Separation test." Dongdukov shouted, this kind of continuous operation does not make much sense. It will change once in three minutes, separation or combination. This is more important, and it is also the focus of another test.
"Wow." At this moment, I heard a shaking inside the gear box inside, and then someone shouted: "No, separation failed!"
The previous dozens of experiments went smoothly, but now, when Qin Guan came here to inspect, the power chain here was malfunctioning.
In addition to the drive shaft, this gearbox and clutch are also an important point. If they cannot be separated or combined normally, it is definitely a tragedy!
The roar of the engine disappeared. The R79 engine seemed to be exhausted after a long period of operation, and finally stopped. Some people could not wait to take the tools and start to disassemble the hot gearbox.
President Gu and the others also looked embarrassed. It was not easy for President Qin to come here once, to see the results, why is there a problem now!