Chapter 1845: Yak-141 metal prototype

They are now in need of double insurance. For the time being, they will design according to the lift engine. At the same time, they will develop a branch to demonstrate the feasibility of this lift fan.
Dongdukov nodded: "I am also very interested. I believe that this is the best way for our fighter to develop successfully."
In this way, Qin Guan came to the Yakleev Design Bureau and achieved a pre-planned goal, to establish a relationship with the researchers here. When the Xiong State is disintegrated, it will be easier to have a good relationship with each other. Brought them over. Now, Qin Guan has paved several channels at the same time. In the future, as soon as Xiong State is disintegrated and the researchers can't survive, all come to Han, Han welcomes you!
"Now, can you introduce the Yak-141 fighter to us?" Qin Guan asked.
They did not intend to introduce Qin Guan and others to Qin Guan and others, but now, the two sides have reached a consensus and can cooperate on the modification of the fighter. In this case, Qin Guan and others can naturally see this fighter, anyway. The MiG-29 can be sold to Han, not to mention this kind of vertical take-off and landing fighter that is not loved by parents.
"Let's go, let's take a look at the all-metal prototype." Shuchikov said.
In the development of fighter aircraft, although computer design can already be used, after all, the fighter aircraft designed on the computer does not seem intuitive. Therefore, an intermediate step in the design of fighter aircraft is to manufacture a prototype.
Ordinary prototypes are generally made of wood, which is fast after all, and the processing of wood is very simple and can be processed into corresponding shapes.
At least the domestically produced fighters have gone through this stage. The J-8, J-10, Xiaolong, and Flying Leopard have all built wooden prototypes. Now, Xiong Guoren has also built prototypes, but Xiong Guoren’s are more advanced. What they came up with was an all-metal prototype, using metal to create the prototype, which made it more textured.
As a result, everyone entered the interior of the Yakerev Design Bureau together, where everyone was surprised to look at the beautiful fighter plane in front of them.
The full metal prototype of Yak-141!
This is completely built on a one-to-one basis. It can be seen that this aircraft is much larger than the Yak-38!
Yak-38 is only 15 meters long and has a wingspan of 7 meters, while Yak-141 has been enlarged to 18 meters long and has a wingspan of 10 meters. If it weren’t for taking care of the aircraft carrier’s lift area, it might have been made larger. .
Now, this fighter aircraft looks more modern. Its shape is prepared for supersonic flight. The large rectangular air inlet looks a bit like MiG-25, and the tail has become a double vertical tail. It is prepared by installing the round rotatable nozzle in the middle.
The outsiders watch the excitement, the insiders watch the doorways, Chen Rui and others have already begun to speculate on the layout of this fighter, where the engine is, where the fuel tank is, how to recycle the landing gear, how to design the air inlet of the fighter, and so on.
Everyone first turned to the tail, where is the biggest secret.
How to control the jet of the engine to spray downward? The simplest way is to use the baffle to change the direction of the airflow directly similar to the vector nozzle of the F-22. When the F-35 was first developed, Lockheed did the same. They designed a duality Single-incline expansion tail nozzle, there are two upper and lower baffles behind the nozzle, of which the upper baffle is much longer than the lower baffle, so that the upper baffle can be deflected downward by 90 degrees to make the jet flow vertically downward.
But soon, they found that this simple approach would bring unacceptable shortcomings, the most important of which was the serious thrust loss caused by air separation.
At the same time, the weight of this nozzle is too large, the tightness is not easy to solve, and the operating structure is quite large.
Later, they thought of the Yak-141 of the Yakerev Design Bureau, and decided to bring in their technology. This is a peculiar way of rotating, in the scientific name, it is called a three-bearing rotating nozzle.
Specifically, the tail nozzle is divided into three sections, and the joints are all at a certain angle. The circle is long on one side and short on the other, and is connected by three sealed circular bearings. Normally, connect horizontally. The long end of the first section is just next to the short end of the second section. In this way, when the three sections are connected, the entire nozzle is horizontal. When needed, just use an external motor to drive the middle one. One segment rotates the gears on the segment so that the front and back segments remain stationary, only the middle segment rotates 180 degrees. The long ends of the three sections will all be combined, and in this way, a structure that is bent down ninety degrees is formed.
The brain of an engineer is always the most ingenious!
Now, on this metal model, everyone sees such a nozzle, which is completely different from the previous Yak-38. The main engine of Yak-38 is divided into two sides. A large circle is divided into two small circles, facing both sides. The jet, right now, is just a big circle, and it turns the nozzle over as soon as it turns.
Very clever scheme.
Of course, this thing has a lifespan. According to the standards of the bear country, a thousand cycles is already very high. It can be used twice for one take-off and landing, and it can use 500 sorties, which is enough for several years of flying.
It is estimated that the nozzle has not reached the end of its life, and the engine is almost at the end of its life.
Qin Guan circled the plane, and then spoke again. How could he miss a chance if he had a chance?
"Chief Shuchikov, have you considered the stealth of the fighter?" Qin Guan asked.
In this era, when it comes to stealth, it is absolutely advanced. For the whole people, it will not be known how terrifying the stealth fighter plane is until the F-117 of the Eagle nation shows its power.
However, the current Qin Guan has always been promoting this matter. Under Qin Guan’s promotion, at least in the aviation industry, stealth is already a very trendy word. Back then, Qin Guan led a team to participate in the air show and once launched The invisible model is quite advanced.
As for the navy, the stealth catamaran guided missile boats produced by Han have already been on sale around the world. They seem to be ridiculous in appearance and inexpensive, so many navies have taken a fancy to them and ordered a batch.
"I've heard of it." Shuchikov said: "You have done a good job of stealth."
"I think that this fighter aircraft can greatly improve its stealth ability with a slight modification." Qin Guan said: "I think we may be able to cooperate in this area."
If improvements are made in the shape of the fighter, then there must be more cooperation with oneself. Qin Guan knows that if the Yakerev Design Bureau wants to survive, it will be able to boldly accept new ideas and adopt new technologies. For example, in the history of parallel time and space, they had modified the appearance of Yak-141, which was called Yak-143 with stealth ability. Later, thinking that it was not enough to bluff people, they changed it to Yak-201. , But it has never been sold.
Now, if we work together, there will be more cooperation content.