Chapter 2797

Turboshaft engine is a special jet engine. The power of ordinary jet engine mainly comes from the exhaust gas and flies forward through reaction force. The turboshaft engine connects the power through the output shaft, which is mainly used to transmit power.

If the internal structure is compared, it is actually to increase the turbine so that all the exhaust gas can be used to drive the turbine to do work and convert it into mechanical energy.

In fact, marine gas turbine can also be regarded as a deformation of turboshaft engine.

Compared with the piston engine, the turboshaft engine is small in size and powerful in power. Therefore, it naturally becomes the best engine for helicopters. It doesn't occupy the space inside the fuselage. It's enough to place the engine on the top of the fuselage. The wide cabin is what you want to do.

In recent years, domestic imitation helicopters and self-made helicopters have failed. The first successful model is the light helicopter developed by introducing swallow technology from noodle country.

Then, after the introduction of Black Hawk, he made great efforts and finally copied the Black Hawk helicopter for surveying and mapping, which was produced in the factory here in the porcelain capital.

The performance of this helicopter is quite outstanding. The engine used has also been imitated under the vigorous research in China. The T700 engine of Black Hawk has been inversely mapped, and the power has been further increased to 1600 kW. It is precisely because of the successful research and development of this power that ten ton helicopters have come out in China, not just general helicopters, Heavy armed helicopters also have reliable engines. It can be said that one engine is enough to support most of the sky of the helicopter.

Now, this engine has also supported the tilt rotor aircraft developed by China.

Listening to Xiao Xu's introduction, Qin Guan began to look at the engines on the short wings on both sides. This kind of aircraft looks particularly wonderful.

The engine compartment is arranged at the ends of the short wings on both sides, just like two big fists waved by two arms. Compared with the short wings, the engine compartment is very large, so it looks particularly uncoordinated.

What is more incongruous is its propeller.

Due to the need for vertical take-off and landing, the propeller must be large to blow enough air flow to promote the vertical take-off of the aircraft. In this way, the radius of the propeller must be large. However, it is different from the rotor of a helicopter.

The rotor of the helicopter has hinge structures such as swing hinge, swing hinge and pitch hinge, which can keep the rotor stable, but the tilt rotor does not. It is more like a propeller like an ordinary turboprop engine, which is rigidly connected. When it flies horizontally, the two large turntables on both sides seem to have a special feeling, so, In many comics, I like to give this kind of plane to Cos.

"The engine power of our mapping plane is 6000 horsepower," said Xu "Our existing power system is less than half of it, so the imitated products can only be like this. If we want to get the same carrying capacity, we have to have the same engine. Moreover, if the power can be further enhanced, there will be more benefits."

The structure of this aircraft is quite complex. On the surface, one engine drives one propeller. In fact, there are special transmission shafts inside. In this way, once one engine fails, the other engine can work at full power to maintain the rotation of the propellers on both sides. Otherwise, it can be imagined that the aircraft will be driven by one side of the screw The thrust of the oar was turned over.

Moreover, this aircraft should still be designed for warships. Therefore, the wings can also be turned over to reduce the volume and facilitate deployment on the aircraft carrier. In this way, the internal mechanism is more complex.

If the engine drives two propellers when necessary, the greater the power reserve, the better.

This is not all the technical problems. Another is that the efficiency of the propeller is not high. Therefore, although the same engine is used, its takeoff weight is far less than that of the Black Hawk.

Compared with the helicopter rotor, the torsion angle of the propeller rotor is relatively large, that is, it seems that the propeller is more inclined than the propeller surface, which is similar to the fan blade of the electric fan. This is to ensure that the blade root can produce large tension in the forward flight state. However, there are gains and losses. The result is that the working efficiency will be greatly reduced in the hovering state, because the engine A large part of the available power transmitted has been lost.

In fact, inside the Institute, many people are questioning this thing. It's better to study a larger helicopter. Even if the three engines are complete, isn't this the design of the Super Hornet helicopter?

Why do you want to make such a nondescript guy? Is this the only one in the world?

After hearing these introductions, Qin Guan nodded seriously: "yes, there are too many technical problems here. However, we have no choice but to overcome them all. After all, the speed of this aircraft in horizontal flight is unmatched by ordinary helicopters, which can make our army dispatch faster."

It has so many problems. Why do we keep developing it? It has a great advantage. It is fast in the horizontal state!

Ordinary helicopters, blocked by large plates on the top, don't fly fast. Generally speaking, many can fly less than 300 kilometers per hour. In contrast, today's aircraft can easily break through 500 kilometers per hour.

Moreover, Qin Guan firmly believed that these problems could be overcome.

"Now, let's start the development of this level of engine." Qin Guan said: "we can ask relevant departments to provide help to overcome various technical difficulties and achieve a significant improvement in power. At the same time, on the other hand, we should also find ways to reduce the weight of the aircraft. For example, using composite materials to reduce the weight of the aircraft and achieve better flight performance."

As long as Qin Guan makes a decision, everything will be easy. Start this engine project immediately and develop it as soon as possible! Everyone has been waiting for this sentence for a long time. Now when Qin Guan said it, everyone was excited.

Moreover, due to our own technical reserves, the development of this engine will not be delayed for too long. The main thing is the project approval of the model. After that, it can also be used for other equipment. It can be said that it is a lot of work.

Looking forward to the stars, looking forward to the moon, and finally looking forward to President Qin's inspection here!