Chapter 1440

Having nuclear power does not mean that the engine is no longer needed, but the turbojet engine behind it will be redesigned. What provides power for combustion is no longer fuel, but nuclear reactor.

This reactor is naturally a fission reactor.

"Does it have any advantages? How long can it fly if it is fueled once?" Jiang Yanhai asked the key question.

Although nuclear power is known to use a small amount of fuel, the nuclear power itself is a very small reactor, which means that its key core can not hold too much nuclear fuel even if it is placed.

"It's about 100000 kilometers to refuel once," Professor Hu gave a specific figure.

Jiang Yanhai took a deep breath, 100000 kilometers. This number is extremely terrible. The circle around the equator of the earth is only more than 40000 kilometers. This means that you can circle the earth more than twice.

This is no longer a matter of operational radius, which means that it can even fly without changing fuel for a long time. As long as its tail turbojet engine life can be maintained, it can even be in the sky all the time.

"Can it go into space?" Jiang Yanhai re estimated its data in his heart. Whether he can go into space mainly depends on how high its air utilization rate is. If the utilization rate is high enough, although the air will become very thin after the plane leaves the ground at a certain height, it should not be a big problem at that time as long as the power is strong enough.

"It's difficult at present, but this is our goal. However, according to our current data, although it can't fly into space, its maximum flight altitude can reach an ultra-high altitude of about 60000 meters."

60000 meters, that is, 60 kilometers from the ground. This altitude has exceeded the flight altitude of all existing fighters. Even some intercontinental missiles have the ability to fly above this altitude. Ordinary interceptor missiles, air defense missiles and air-to-air missiles do not have this ability.

Jiang Yanhai estimated it in his heart. In fact, if all the parameters are corrected according to the data analysis system, it can barely fly to space. However, after flying to space, its internal fuel will be basically exhausted. This landing must be a problem.

But compared with the previous aircraft, this is really a great progress.

"What about the speed of the plane?"

"If the new composite material is adopted, the cruise speed can reach Mach 4.5 and the maximum speed can reach Mach 6, but it needs to be achieved at super high altitude," Professor Hu gave a number.

"Have you found the materials to solve the thermal barrier?" Jiang Yanhai was really a little surprised this time. Human fighters have never been able to break through Mach 3 or above. Before the phantom came out, it was because the thermal barrier was not so easy to solve.

When the blackbird reconnaissance aircraft broke Mach 3, its overall length could even increase by more than 20 cm. It can be imagined how terrible the thermal expansion and cold contraction of materials are.

The phantom solves this problem because the expensive ultra-high temperature resistant conforming materials on the fuselage have reached a certain level of resistance to high temperature, so that after reaching such a high cruise speed, the thermal expansion of the fuselage is controlled within a certain range, and the parts will not produce too much deformation.

However, after exceeding Mach 3, it can be said that when the speed increases by Mach 1, the temperature increases more violently. At least the original material of the phantom can not bear the cruise speed of Mach 4.5 and the limit speed of Mach 6.

"I found it. Speaking of this, I have to say, Xiao Jiang, you are this." Professor Hu gave Jiang Yanhai a thumbs up directly.

Several other professors looked at Jiang Yanhai with admiration. "In fact, we found this material before. It is a composite material combined with new materials from Daqin and Hongxing. We found that it has strong high temperature resistance, and the coefficient of thermal expansion is infinitely close to zero like some ceramic materials."

"Of course, these two points are not enough. It also needs to have other characteristics that can become fighter materials."

"However, we have never found the most suitable formula, because there are too many new materials. New materials are found almost every day, and the data recorded by the materials research institute in this regard, the new data in the last month exceeds the data they added in the previous year."

"If it's not Pangu system, it's estimated that we don't know how long it will take to find it."

"Because of the existence of Pangu system, we have solved the problem of this new material in a very short time, so we have these demonstrative next-generation phantom upgrade plans," Professor Hu said.

Jiang Yanhai shook his head with a smile and said, "I just provided tools, but in fact, what is really completed is you. Even without us, you will still complete it in a very short time."

"But before I came, I heard Professor Liu say that you have other upgrade plans?" Jiang Yanhai was curious.

There are two upgrade plans for the next generation of phantom, which can be said to be one of two.

Before he came, Jiang Yanhai didn't know the two plans.

"Yes, the second plan is still conventional power." Professor Hu nodded, "but thanks to the application of new materials, we have upgraded the phantom engine."

"It mainly improves its fuel efficiency. Under the condition that the current fuel loading of phantom does not become, its range has been increased by more than 50%, and the turbojet efficiency is higher, and the output power in a short time is higher. In addition, we have also overpressured its compression chamber." Professor Hu said quickly.

"Now it has smaller volume and smaller nozzle, but it has more power."

Jiang Yanhai immediately gave Professor Hu a thumbs up. Generally speaking, when the gas speed through the tail nozzle of a fighter engine is certain, the larger the nozzle diameter, the greater the thrust.

Of course, the nozzle diameter can be adjusted. Different flight postures use different nozzle diameters, and now they have made smaller nozzle diameters in this regard.

In fact, to put it bluntly, the reason why we can do this is that in the past, our materials failed, but now our materials have passed, and even the material properties have great redundancy, so we can squeeze the ultimate performance of the materials.

The air is compressed harder. Even if the diameter of the nozzle is reduced, the jet speed is faster than before! The thrust will also increase naturally!

The basis of all this is materials... Without strong enough materials, nothing can be done.