Chapter 2797: Still a drag on the engine

A turboshaft engine is a special jet engine. The power of an ordinary jet engine mainly comes from the discharged exhaust gas, and it flies forward through the reaction force. The turboshaft engine connects the power through the output shaft and mainly uses this output shaft to transmit power.
If you compare the internal structure, you actually increase the turbine so that all the exhaust gas is used to drive the turbine to do work and convert it into mechanical energy.
In fact, marine gas turbines can also be regarded as a deformation of turboshaft engines.
Compared with the piston engine, the turboshaft engine is small in size, but the power is quite powerful. Therefore, it naturally becomes the best engine for helicopters. It does not occupy the space inside the fuselage, as long as the engine is placed on the top of the fuselage. Enough, big cabin, what do you want to do.
In the past few years in China, a model of imitation helicopters and self-made helicopters have failed. The first successful model was a light helicopter developed by introducing swallow technology from Noodle Country.
Then, after the introduction of the Black Hawk, I made great efforts and finally imitated the Black Hawk helicopter for surveying and mapping, which was produced in the factory here in the capital of China.
The performance of this helicopter is quite outstanding. The engine used has also been imitated under domestic efforts. The reverse mapping of the Black Hawk’s T700 engine has also further increased its power to 1,600 kilowatts. It is precisely because of this power. Successful research and development has led to the emergence of domestic 10-ton helicopters. Not only are general-purpose helicopters, but heavy-duty armed helicopters also have reliable engines. It can be said that one engine is enough to support most of the helicopter's sky.
And now, this engine also supports the domestic self-developed tilt-rotor aircraft.
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 looked particularly weird.
The engine compartment, arranged at the end of the short wings on both sides, is like two big fists with two arms swinging out. Compared with the short wings, this engine compartment is very large, so it looks extremely uncoordinated. .
What's more uncoordinated is its propeller.
Because of the vertical take-off and landing, the propeller must be large to blow enough airflow to push the aircraft to take off vertically. In this way, the radius of the propeller must be large, but it is not the same as the rotor of a helicopter.
The helicopter's rotor has hinge structures such as swing hinges, swing hinges, and pitch hinges, which can keep the rotor stable, but the tilt rotor aircraft does not. It is more like an ordinary turboprop, and is rigidly connected. , And when it is flying horizontally, the two large turntables on both sides seem to have a special feeling of cuteness. Therefore, in many comics, I like to give this kind of aircraft to cos.
"Our surveying and mapping aircraft has an engine power of 6,000 horsepower." Xiao Xu said: "Our existing power system is less than half of it, so the imitation product can only be like this. If we want to get the same carrying capacity, we have to have the same engine, and if the power can be further enhanced, the benefits will be even greater."
The structure of this kind of aircraft is quite complicated. On the surface, one engine drives one propeller. In fact, there is a special transmission shaft inside. In this way, if one engine fails, the other engine It can work at full power and maintain the rotation of the propellers on both sides. Otherwise, the result can be imagined that the aircraft will be overturned by the thrust of the propeller on one side.
Moreover, this aircraft should still be designed for warships, so the wings can also be flipped to reduce the size and facilitate deployment on the aircraft carrier. In this way, the internal mechanism is more complicated.
If the engine is allowed to drive two propellers when necessary, the power reserve is naturally the greater the better.
This is not the entire technical problem. Another is that the efficiency of the propeller is not high. Therefore, although the same engine is used, its take-off weight is far smaller than the Black Hawk.
Compared with the helicopter rotor, the torsion angle of the propeller rotor is relatively large, which means that the propeller is more inclined than the propeller surface, which is similar to the blade of an electric fan. This is to ensure that the root of the propeller can be produced in the forward flight state. Larger pulling force. But there are gains and losses. The result of this is that work efficiency will be greatly reduced when hovering, because a large part of the available power delivered by the engine is lost.
In fact, many people within the institute are questioning this. Why don't you study a larger helicopter, even with three engines, the Super Hornet helicopter, isn't it this design?
Why does one want to engage in such a nondescript fellow? Is this the only one in the world?
Hearing these introductions, Qin Guan nodded earnestly: "Yes, there are too many technical problems here, but we have no choice but to overcome them all. After all, the speed of this aircraft in a horizontal flight state It’s hard to match with ordinary helicopters, and it allows our army to dispatch more efficiently."
It has so many problems, why continue to research and develop, because it has a big advantage, it is fast in a horizontal state!
Ordinary helicopters, blocked by the large plate on the top, make it fly at a slow speed. Generally speaking, many of them can fly less than 300 kilometers per hour. In contrast, the current aircraft can easily break through five. 100 kilometers per hour.
Moreover, Qin Guan is determined that these problems can be overcome.
"Now, let's start the development of this level of engine." Qin Guan said: "You can ask relevant departments to provide help to overcome various technical difficulties and achieve a substantial increase in power. At the same time, on the other hand, we must also Think of 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 decides, everything will be easy. Start this kind of engine project immediately and develop it as soon as possible! Everyone had been waiting for these words, and now that Qin Guan said, everyone was cheered up.
Moreover, since we already have technical reserves, the development of this kind of engine will not be delayed for too long. The main reason is the establishment of the model. After it is available, it can be used for other equipment, which can be said to be more work.
Hope for the stars and moon, and finally look forward to President Qin's visit to his side!