(Something happened at home, and the 22nd explosion couldn't be done, I'm sorry brothers, that's all there is to do today.) Pen, fun, pavilion www. biquge。 infoWait until the matter is dealt with, and then choose the time to explode! ）

"How much money is missing?" Liu Yijiu asked directly. "When will the experiments be carried out after the funding is in place? In addition, the Americans are using a hard-pipe refueling system, which is technically difficult and complex in structure, and we can produce it? ”

Every question Liu Yijiu asks is the key.

He still knows a lot about tankers.

Otherwise, he wouldn't have been without any urging.

"At present, the imitation of the Americans' hard-tube refueling system, due to our lack of processing capacity and design capabilities, so we do not use the hard-tube refueling system that comes with Boeing, but the hose refueling system with less technical difficulty......" Seeing Liu Yijiu's brows furrowed, he quickly explained, "Of course, the work of imitating the hard-pipe refueling system has also been carried out." ”

"How far has it go?" Liu Yijiu didn't care about the hose refueling system at all. "The hose refueling system, although it is easy to operate and simple in technology, is too slow to refuel, and can only be used for fighter refueling with high maneuverability and small refueling volume. At present, our bombers have a short range, a small combat radius, and transport planes, etc., the range is not long enough, and if we want to carry out long-range operations, we also have to carry out in-flight refueling......"

What Liu Yijiu said is indeed the truth.

The Republic does not currently have long-range bombers, and even if long-range bombers, as in the Anglo-Afghan War, Vulcan with a combat radius of only more than 3,000 kilometers, are used to bomb Argentina, it still needs a larger number of Vulcan modified air tankers to refuel in order to carry out aerial bombing of Argentina.

The Republic's H-6, after not being improved, is not even able to reach the combat radius of Vulcan.

"Not only that, but we also need to have helicopters, large transport planes, etc. The use of hose refueling is simply not suitable! ”

Since the world's first air tanker was born in the United States in 1923, the role of air tankers has become more and more important, especially for aircraft to perform long-range and ultra-long-range missions.

The hose refueling system was originally born, and it is used by all major powers in the world as an air refueling method. Although the technical structure is simple and easy to disassemble and assemble, each unit can transport 1,600 liters of fuel per minute, and several sets can be installed on one tanker, which can refuel several aircraft at the same time. However, the hose will flutter due to the air flow during refueling, and the fuel transfer efficiency is low, so it can only be used for fighter refueling.

Hard-tube refueling system, the refueling tube is hard, with good stability and easy docking, suitable for in-flight refueling of any type of aircraft, with a maximum refueling capacity of 6,500 liters per minute. However, due to the complex technical structure and the fact that only one tanker can be refueled at the same time, it is mainly used for large air tankers.

And the hard-pipe refueling system is only mastered by the United States.

Typically, the highest efficiency is achieved when two refueling systems are mixed on a dispenser.

"Director Liu, we also know, but under the current situation, our technical foundation is ......weak," Sun Daoqian said with some embarrassment.

Why didn't he know which way of refueling was more appropriate?

The problem is that there is simply not the slightest technical reserve in the country.

Even if there is an air tanker modified from the American Boeing-707, it is also because there is only one such one, and the processing technology and control technology cannot be achieved, so they dare not completely dismantle the entire air refueling system......

With Chinese technology, once it is disassembled, it cannot be installed back at all.

Even, a lot of surveying and mapping work cannot be done because there is no suitable high-precision measurement equipment.

"At the moment, we still have time. Moreover, in the case that the Yun-10 has been flying for so many years, there is no need for us to use the H-6 as a carrier. Boom six, it's too small! If the American air refueling system were to be disassembled, mapped, and then reprocessed, how long would it take to successfully produce it? Liu Yijiu asked Sun Daoqian.

"We don't have a coordinate measuring machine, and we have negotiated with foreign countries several times, but they have not been provided to us, and they are not exported at all. There are also some top-level five-axis machining centers, and the five-axis machining centers produced by the Ninth Academy are also unable to achieve accuracy...... "Sun Daoqian told him about the difficulties he has encountered so far.

Liu Yijiu's brows suddenly furrowed, "Don't we already have a coordinate measuring instrument in China?" The five-axis CNC machining center of the Ninth Academy cannot meet the accuracy requirements? Isn't that going to be? ”

"If it's machining, it's fine, the key is the five-axis grinding machine. Many parts are processed with special-shaped surface parts......"

Five-axis CNC grinding machine, which is the top equipment of CNC machining center.

The Ninth Academy has just begun research in this area.

Some of the core parts of the pressure equipment need to show that the finish is indeed very high, which requires superb processing technology.

Without equipment, the Ninth Institute can also produce and manufacture, but it will require more man-hours.

"Is there any problem with handing over the parts that need a five-axis grinding machine for finishing to the high-precision machining workshop of the Ninth Academy, and in addition, the three-coordinate measuring machine, and mobilizing one from the Ninth Academy?" Liu Yijiu thought for a while, air tankers, this is absolutely indispensable.

And there has to be progress.

"There's no problem with that. If we can provide parts and coordinate measuring machines, we will be able to get them out in half a year! Sun Daoqian's face was excited, "I can make a military order!" ”

"I don't need you to make a military order, I just need to see the results. Moreover, I need to be able to refuel at least six fighters in the air at a time......" Thinking that the bomb six could only refuel two fighters at one time, Liu Yijiu was so painful that he didn't want it. "Installing a hard-tube refueling system at the tail of the tanker, and a hose refueling system on the wings and belly, can completely refuel several fighters at the same time. In this way, as long as our air tankers carry enough fuel, each can provide a squadron of fighters with air refueling......"

"This ......" At the beginning, Sun Daoqian and others really didn't think about such a problem.

Even Hao Hongfei and the others were confused.

It is really unimaginable that Liu Yijiu would make such a request.

"At present, the development direction of tanker aircraft in various countries in the world is mainly to overcome the influence of wing vibration, gusts of wind and air vortex on the stability of oil pipelines; converted into an aircraft with two types of refueling equipment; Improve the fly-by-wire refueling control system. These are also questions that you need to take into account. Only with a hybrid approach to in-flight refueling can it be more flexible to suit a wide range of tasks. ”

"But in this case, our project will be much more difficult!" Hao Hongfei finally found a chance to speak.

"How much more difficult can it be? Hasn't the hose refueling system been worked out? There is also a hard pipe system, it will not take long, as long as the two systems are integrated. Although I know that it is much easier said than done, but if we don't do it, can we solve the problem? Liu Yijiu said with some unhappiness.

For him, it doesn't matter how difficult it is, but whether the project team has the determination to do it.

If you haven't done it yet, what else can you achieve?

"Director Liu, this is not very suitable. You also said that we also need to serve the influence of wing vibration and other factors to make the performance of the fuel pipeline more stable, and at the same time, we also need to improve the fly-by-wire refueling operating system. Even if the fuel dispenser can carry an extra ton of fuel, sometimes it will have a very important role! Zhao Yunhai also asked Liu Yijiu with a frown.

The trend of world development is that this is the case, but it is only the US military that has done so.

The Soviets did not take this aspect into account, and their air tankers mainly used hose refueling systems, which did not have much impact.

After all, air tankers are mainly used for in-flight refueling of fighters.

"The United States has long-range strategic bombers like the B-52 and B-2, and the Soviet Union has super strategic bombers like the Tu-95 and Tu-160, so their requirements for air tankers are not too high. Also, they have a huge number of warplanes, deployed throughout the country, and what about us? We only have the H-6 fighters with a combat radius of less than 3,000 kilometers, and apart from the J-10 and J-11, what is the combat radius of other fighters? Even if our J-10 and J-11 have a combat radius of more than 1,200 kilometers, or even 1,400 kilometers, how much can our country's national strength be equipped? Liu Yijiu's words made Zhao Yunhai and the others speechless.

The United States and the Soviet Union did not need too powerful air tankers at all, but they were still developing air tankers.

Whether it is a Chinese fighter or a bomber, the combat radius is really not enough, but there are no air tankers.

It stands to reason that China's requirements for air tankers are higher and greater.

However, China's foundation is too poor, and it is not easy to make it a larger, more powerful, and advanced air tanker.

I haven't even done the transformation of the tanker from the H-6 for so many years, and now thinking about this, it is obviously a little inappropriate.

"So, we have to think about the performance of our tankers, not just the yes and no." Liu Yijiu emphasized. "As long as you get the most technologically advanced, even if it takes a little time, it doesn't matter."

"Director Liu, this requires more funding......

Hao Hongfei reminded Liu Yijiu.

To do this, time is not important, what matters is that they need more money.

(To be continued.) )