Chapter 479

"Don't talk nonsense. If you want to be savage, go home to find your mother-in-law at night. It's close to the maximum power. Be steady for me."

As soon as the pilot's words were finished, song Changzheng took them back. Although Qian Qiang, who paid attention to the test flight, was used to it, he still had the impulse to cover his face and pretend he didn't know the old man.

Song Changzheng, a naval technical expert and deputy director of the aviation equipment technology research institute, is usually approachable and always smiling. When he joined the army, he was like a new man, tearing off the mask of a scholar, and being like a ringleader who occupied the top of the mountain. As long as it wasn't a regular match, it was common for me to be long and short.

All kinds of perfumes, little meat jokes and loud voice were the real daily life of the old song dynasty.

so that Qian Qiang saw every time he saw the song Changzheng in the pile of soldiers and soldiers, holding the large tea pot filled with Baijiu, and even scolding the noisy heir and the various kinds of crazy people.

"It's really worth mentioning. I think the spare power of the engine is quite enough. Unlike the ai-24t of the Soviet Union, although it has the maximum horsepower of 2820, it will boom when taking off with full oil and full load. When it comes to 2500 horsepower in level flight, it will weaken severely, and it can't make it strong at all."

Qian Qiang is still thinking wildly. The pilot's words came again through the radio. Song Changzheng frowned and thought, but he didn't dare to make up his mind, because the maximum power of the d-46ml turboprop engine provided by Tengfei aviation power is 2051kw, which is 2788hp.

Judging from the specific data, it is not as good as the original ai-24t turboprop engine of the Soviet Union, because the power of the Soviet product is 2074kw, equivalent to 2820hp.

It seems to be slightly better than the d-46ml turboprop engine.

But in fact, it is not easy for ai-24t turboprop engine to reach its maximum power. Unless the engine life declines and the fuel consumption regardless of the cost, even so, the maximum power of ai-24t turboprop engine can only be maintained for a few minutes, because over a long period of time, the oil carried by the aircraft will not be enough, and it is easy to cause friction in the inner bearing of the engine Falling off, causing an in-flight stop.

Therefore, unless the engine is full of fuel and full load, in order to accelerate the take-off, the pilot will increase the throttle and boom at the maximum power of ai-24t turboprop engine to assist the take-off. Generally, the take-off power of an-26 is about 2500 horsepower.

In this way, the d-46ml turboprop engine is better than the original ai-24t turboprop engine of the Soviet Union.

Because the d-46ml turboprop engine is 2788 horsepower, that is 2788 horsepower, there will be no discount at all, but in terms of the stability of power output, the d-46ml turboprop engine can fully meet the general requirements of an-26.

As for full oil and full load, although the maximum horsepower output is not as large as that of ai-24t turboprop engine, the weight of d-46ml is only 500kg, which is 100kg lower than that of ai-24t 600kg. In addition, a series of optimizations have been made for the internal lubricating oil, oil pipeline rate and deicing system. In addition, a six blade variable pitch composite propeller has been used, which makes the whole engine more stable Compared with ai-24t, the structure is more compact, lighter and more efficient.

Because of this, although it is slightly inferior to the ai-24t in maximum power, it can not be detected at all in practical application. On the contrary, it feels that it is much better than the ai-24t in some aspects.

Because the power output of the d-46ml is more stable and the fluency is better, especially the new six blade variable pitch propeller made of composite materials can improve the lift of an-26 immediately. Therefore, even if an-26 takes off with full oil and full load after the replacement, the d-46ml does not need any effort or even spare force.

In this respect, the pilot of the sky test flight can see it better than anyone else. It's 2612 horsepower, but the engine is in a very good state. In this case, the pilot, like the racing driver driving a sports car, wants to experience a strong sense of pushing the back.

However, the pilot wanted to have a good time, but song Changzheng was very cautious. Although he was careless with the officers and soldiers below, he was just like a loud horse leader. It was just a small way to get together with the officers and soldiers.

In fact, song Changzheng's head is very clear. If not, how could he become a member of Harbin military industry, and how could he become a naval aviation equipment expert step by step? Therefore, he is still a little resistant to the pilot's attempt to cruise with high power.

After all, the new an-26 showed excellent performance during the test flight. Thanks to the technical exploration of Tengfei aviation power in fuel saving, the fuel consumption rate of d-46ml reached 0.294 kgkwh, which was 35% lower than that of the original ai-24t of the Soviet Union.

Combined with the more efficient six blade composite variable pitch propeller, the fuel economy is further improved, and the overall fuel consumption is reduced by 46.27% compared with that before the replacement.

In other words, in the case of inconvenient overall structure, the maximum range of an-26 increased by 46.27% by simply replacing the engine, from 2500 km to 3656 km now. If additional fuel tanks were added inside the aircraft, the range could be further increased to 4000 km.Today, the South China Sea, the most vast of the sea frontiers, is only 2000 kilometers long from north to south. An-26, with a range of 4000 kilometers, can cruise from south to North in the South China Sea.

This is too important and precious for a navy that lacks air support.

The reason is that in addition to the yun-8 sea patrol aircraft, the h-6-d bomber is the type of aircraft in the Navy that can carry out this kind of long-distance flight. The problem is that the number of the two types of aircraft is not only small, but also they often have to switch back and forth between the three fleets. They can not be stationed in one direction for a long time. Needless to say, the operating cost is extremely high.

It is the limitations of the yun-8 maritime patrol aircraft and the hong-6 Ding bomber that highlight the value of the an-26 with the d-46ml.

Because of this, when the Navy headquarters learned about the flight test after the replacement of an-26, it immediately asked song Changzheng to complete the flight test work with both quality and quantity, and strive to formally equip the army and carry out adaptive training before the end of the year.

Others don't know the urgency of the Navy headquarters. How can song Changzheng, the leader in charge of flight test, not be as blind as others? If something goes wrong and affects the planning of the headquarters, he will be guilty.

So he frowned and thought for a long time, but still couldn't make up his mind. Finally, he turned his head to Qian Qiang and asked, "how long can your d-46ml last at maximum power?"

"At least 1800 hours." Qian Qiang answered without hesitation.

Song Changzheng was stunned for a moment, immediately grinned, then picked up the phone and said: "keep a good posture, control the direction, you can be barbaric, but don't go too far."