Chapter 1843

You can't have both fish and bear's paw. It's certainly impossible to be comprehensive and advanced in all aspects. Unless the super abnormal Eagle Technology of later generations can produce an engine with a thrust weight ratio of 10 and super fuel economy, even so, the eagle F-35 vertical take-off and landing fighter still has frequent failures for so long, Project costs are also constantly overspending.

In today's xiongguo, the engine already consumes oil and the thrust weight ratio is not high. It is very difficult to reach the level of later generations.

According to their design, the Jacques-141 fighter has a maximum range of 1500 kilometers in the state of vertical take-off and landing, which is much better than the mast guard. If it is a short-range take-off with auxiliary fuel tank, it can reach 2100 kilometers. However, even if it is only a light-weight F-16 fighter, the range is often 3000 kilometers or even 4000 kilometers, so, The range of Jacques-141 is still quite short.

Now, Qin Guan actually said that the shortcomings of the voyage could be changed. Immediately, the people present were excited. At this time, everyone was in front of the jacques-38 model. Facing this model, they were waiting for Qin Guan's explanation.

How can we increase the maximum range?

"Our VTOL fighter adopts the layout scheme of the rear main engine and the front lift engine. This method is very mature, the thrust layout is perfect and easy to control. However, at the same time, it also leads to more units of the whole power system, wasting space and increasing fuel consumption. Moreover, the tail flame is too large and the problem of ablation of the deck cannot be solved."

The staff of yaklev Design Bureau secretly admire Qin Guan. Qin Guan is a genius. He sees the key to the problem at a glance and makes it clear!

Yes, this is the main problem faced by jacques-38 and even Jacques-141, especially the lift engine in front, which is directly placed vertically, facing the lower deck, and the thousands of degrees of tail flame sprayed directly facing the deck. Nothing can stand it!

When the Han state was faced with problems, it was still the local law that laid a layer of refractory bricks directly below. At that time, Chen Rui thought of it.

Now, Chen Rui is quietly listening to Qin Guan's analysis. He knows that his brother-in-law must be able to give a perfect solution.

Why doesn't the Harrier have the problem of melting the deck? It's because the sea harrier doesn't have a lift engine. People directly use an engine, which draws air from the compressor in front.

"Then, Mr. Qin, how do you think this problem should be solved?" Dong dukov opened his eyes and looked at Qin Guan. He knew that Qin Guan would give a perfect answer.

"The solution to this problem is actually very simple. Why do we have to put a special lift engine in front of us? Let's put a lift fan in front of us, and it will be solved?" Qin Guan said.

The lift engine is a small jet engine placed vertically, which ejects hot gas downward. Now, the lift fan is just a large electric fan, blowing down. In this way, it blows out cold air, and the problem of burning the deck can be easily solved.

"President Qin, it's not that simple." when Qin Guan said this, dongdukov took up the conversation, because he happened to be in charge of this part. After all, Qin Guan is a layman. It's too simple to think about the problem: "We are now placing two lift engines in front of us. The thrust of a single engine is 41 kn and the thrust of two engines is 82 kn. If we change the way of becoming lift fans, what fans do we have that can provide such strong thrust? This idea is possible. In engineering, it is unrealistic. What system should we use to promote this fan?"

The fan has to be powered to turn, doesn't it?

In fact, it is also possible to use a single lift engine. After all, its empty weight is only 11 tons, and the main thrust comes from the rear. However, they go to two engines for insurance!

"As long as you use your brain, there will be a way." Qin Guan continued: "We can connect a transmission shaft from the rear main engine. This transmission shaft can drive the front fan. Isn't this power enough? Moreover, the biggest advantage of doing so is that it can save fuel. It is equivalent to the external culvert of turbofan engine. It can achieve the maximum effect by consuming very little fuel."

Now all the engines in the world have transitioned to turbofan engines. Compared with turbojet, it is to add an external culvert outside, use the rotating shaft of the engine to drive several large fans to blow backward, and directly provide thrust backward. In this way, a lot of additional thrust is added, and fuel can be saved.

Now, directly build a lift fan and take the power from the back, so it's all solved.

On the one hand, fuel saving. You have two lift engines, both of which are turbojet. It costs a lot of oil. Now it's a big fan, and fuel saving is absolute. On the other hand, the wind blown by the fan is cold, and the problem of burning the deck can be solved.

Qin Guan said this, of course, is the idea of the F-35. The vertical take-off and landing model of the F-35 refers to the Jacques-141. However, people changed the front lift engine into a lift fan, which perfectly avoided the shortcomings of the Jacques vertical take-off and landing fighter.

Now that Qin Guan's words have been finished, he paused for a while, leaving others time to think and react. If you can smoke here, light a cigarette and wait silently. It's enough to pretend to be forced.

Qin Guan's words, of course, brought them a huge shock. They had never considered it before. Yes, if they did, the problem could be solved. Lead a transmission shaft to transform the front lift engine into a lift fan!

The lift fan will certainly be lighter than the lift engine. After all, it is only equivalent to the compressor part of the engine. The self weight is reduced, and the extra weight can then put fuel. At the same time, it can also save fuel. You know, the most fuel consuming time of vertical takeoff and landing fighter is the takeoff and landing stage. It's not worth burning 20 or 30% of the fuel, Now we can save half of the fuel in the aircraft, and the range of fuel in the aircraft may be expanded from fifteen to two thousand?

Moreover, the problem of melting the deck has been solved. This is the most perfect fighter!

But is it easy to implement?

Dongshe KOV first thought of this question. He asked Qin Guan, "do you know how much power this transmission shaft wants to transmit?"