Following the direction of Qian Qiang's finger, everyone saw that a gas turbine power unit about three meters long, less than one meter high, with scattered surface pipelines and a dark golden luster was being placed on the thick test bench below, which was running surging on the test bench.

Seeing that the others were fine, Li Fang looked at Qian Qiang with a serious face, and asked in a rather serious tone: "Qian Gong, are you sure that the maximum power of your D-50 has reached the level of three thousand kilowatts?"

Not only Li Fang, but Song Changzheng also cast inquiring eyes.

It is no wonder that the two of them are so skeptical, except that the Tengfei plant suddenly rose from D-40 at the 1,000-kilowatt level to D-50 at the 3,000-kilowatt level.

The most important thing is that the two of them, as experts in armament technology of the Navy, have seen the same level of aero engine, that is, the turboprop-6 on the Y-8 maritime patrol aircraft that was just equipped with the Navy a few years ago.

But because of this, the more the two looked at the D-50 on the test bench, the more frowning, the reason is very simple, compared with the turboprop-6 of the same level, the D-50 is one or two times smaller than the turboprop-6 in other aspects, except for the length of the turboprop-6.

It's like two boxing men, tall and short, but the weight difference is one or two levels, but the thin man who should play lightweight says that he has the strength to impact the heavyweight gold belt, and he has to try two pounds with the big fat man in the heavyweight, which makes people feel that the thin man is a little self-conscious.

At this moment, Li Fang and Song Changzheng have a kind of mentality of looking at the lightweight boxing macho when they look at the D-50, and they must know that the power of the aero engine has a lot to do with the air intake, so appropriately increasing the diameter of the engine will help increase the air intake.

The D-50 that can take off aviation power does not seem to have changed in this regard, except for the lengthening of the entire engine and the slight thickening of the complex pipeline on the surface, the overall inner diameter of the D-40 gas turbine power unit parked next to it is not fundamentally different.

It can be said that the D-40 gas turbine power unit is a stretched version of the Lappier gas turbine power unit, but how can such a gas turbine power unit have a power of 3,000 kilowatts? You must know that the turboprop-6 equipped with the Y-8 is based on a similar engine in the Soviet Union, and that is the optimal result determined by the Soviet aviation technology department after rigorous calculations, so how do the two of them think that what Qian Qiang said just now is a bit exaggerated.

Qian Qiang didn't answer, but asked the operator on the side: "Xiao Chen, how much power is it now?"

"Two thousand two. ”

"Add to three thousand. ”

"Okay. ”

Before the voice fell, Xiao Chen slowly pushed the control valve next to him, and the power on the constantly beating display began to jump up, and soon the number reached 3046 kilowatts, Xiao Chen stopped pushing up, and then checked the data on the screen to see if there was any situation after the power went up.

In fact, you don't need to look at the numbers on the screen, you can know from the ever-increasing roar on the test bench that the power of the D-50 is increasing little by little.

Until the cacophony of humming filled the entire console, fortunately the console was soundproofed, otherwise the loud noise emitted by the gas turbine power unit was enough to make the people inside hearing impaired.

However, Li Fang and Song Changzheng didn't care about this, they just looked at each other in disbelief, and they didn't know what to say.

A lightweight boxer really has what it takes to challenge the heavyweight big fat guy.

This is already a miracle in the boxing ring, but if it is put on the gas turbine power plant, it is a miracle of miracles, you must know that the ultimate pursuit of all aviation equipment is to be as lightweight as possible, so as to obtain better adaptability.

The same is true for gas turbine power units, whether they are used as power for aircraft or as power generation devices on the ground, lightweight gas turbine power units can become more flexible and easy to use.

"The mass of your D-50 should be about a ton, right?" After Li Fang and Song Changzheng lowered their heads and exchanged two sentences, Song Changzheng finally opened his mouth to ask a question, and Li Fang on the side also looked at Qian Qiang and waited for an answer.

"One ton? When did the gas turbine power plant be calculated in tons, and we use kilograms for aviation power, but if the troops calculate it this way, our D-50 has a total mass of 0.857 tons. ”

Listening to Qian Qiang's words, Li Fang and Song Changzheng had a big red face, but before they could find a crack in the ground to drill into, they heard the number 0.857 tons, and the two of them were stunned for a moment, and they didn't react for a while, but Li Fang frowned and muttered: "Less than a ton?"

"857 kilograms, it's still far from a ton!" Director Zhao, who had been silent, finally couldn't stand it, Qian Qiang was just about to talk about the navy, and he had to get by, but when Lao Qian came up, he moved the troops out, and a map cannon blew up Director Zhao.

In addition, Li Fang and Song Changzheng didn't understand what 0.857 tons meant for a while, and Director Zhao finally couldn't help it, and reminded him quietly.

However, Li Fang and Song Changzheng ignored Director Zhao's tone of hatred that iron does not become steel, because both of them were shocked by the value of 857 kilograms, you must know that the turboprop-6 is 1,200 kilograms and 1.2 tons of weight, so Song Changzheng will use the unit of tons.

According to the estimates of the two of them, it is already a big technical leap to reduce the weight of 200 kilograms compared with the turboprop-6, and as a result, the D-50 that takes off aviation power not only dropped to less than 1,000 kilograms, but also reached an incredible figure of 857 kilograms.

This made the two not only surprised, but completely shocked, to know that the weight reduction of aviation equipment is a worldwide problem, all aspects of the design, sometimes in order to achieve the weight reduction requirements of a structural part, the technical team is really day and night a gram of weight down a gram of weight.

To achieve the kilogram weight reduction requirements can be said to have a lot of technological progress, 100 kilograms of technical leaps are generally extravagant, but can take off aviation power D-50 is more than 300 kilograms lower than the same level of turboprop - 6, that is not a technical leap, but a technical leap.

Light weight, sufficient power, put on the plane is equivalent to a simple structure, increase in the load, put in other fields also have great potential, so Li Fang and Song Changzheng for the first time showed a strong desire for knowledge, especially Li Fang changed the previous cold temperament, sincerely asked Qian Qiang: "Qian Gong, how did you do it." ”

"Ah~~ simple, the compressor we have increased from the previous six to fourteen, increasing the air compression ratio; the turbine has been expanded from the original two to four, improving the operating efficiency, with the HX-4-1 core machine, in the case of no increase in diameter, the power has increased by three times compared with D-40, which is considered to be the expansion limit of the HX-4-1 core machine......"

Qian Qiang was about to say something more professional about the airflow rate and power conversion between the compressor and the turbine, but Li Fang stretched out his hand to interrupt: "Qian Gong, what I am asking is not the principle of the aero engine, but how do you get to the mass of the whole machine to 857 kilograms? You must know that the turboprop-6 of the same level is 1.2 tons, oh no, it is 1,002 kilograms, and your D-50 is 343 kilograms lower than the turboprop-6." ”

"Oh~~ It turned out to be this. Qian Qiang nodded suddenly: "Of course I used new materials." ”