(Something happened at home, and I couldn’t do it on the 22nd. Sorry, brothers, I’ll just have these two updates today. When the matter is processed, choose the time update!)

"How much money is missing?" Liu Yijiu asked directly. "When can the experiment be carried out after the funds are in place? In addition, Americans use hard-tube refueling systems. This refueling system is technically difficult and has a complex structure. Can we produce it?"

Every question asked by Liu Yijiu is the key.

He still has a lot of knowledge about the tanker.

Otherwise, he would not have been without any urging.

"At present, because we lack the processing and design capabilities of Americans, we use the hard pipe refueling system that is built on Boeing, but the hose refueling system with less technical difficulty..." Seeing Liu Yijiu's brow frowned, he quickly explained, "Of course, we are also doing the work of imitating the hard pipe refueling system."

"How far has it been done?" Liu Yijiu didn't care about the hose refueling system at all. "Although the hose refueling system is convenient to operate and simple to use, the refueling speed is too slow. It can only be used for refueling fighter jets with high maneuverability and low refueling. At present, our bomber H-6 has a short range and a small combat radius, and has transport aircraft, and the range is not long enough. If you want to carry out long-range operations, you also have to refuel in the air..."

What Liu Yijiu said is indeed true.

The Republic currently does not have long-range bombers. Even long-range bombers, like the British-Arab War, Vulcan, which had a combat radius of only more than 3,000 kilometers, was used to bomb Argentina, and it also required more than aerial tankers modified by Vulcan to refuel before they could carry out air bombing on Argentina.

The H-6 of the Republic, even the combat radius of Vulcan could not be reached without improvement.

"Not only that, we need to refuel, we also need helicopters, large transport aircraft, etc. It is simply inappropriate to use hose refueling!"

Since the world's first aerial refueling machine and its birth in the United States in 1923, the role of aerial refueling machine has become increasingly important, especially when aircraft performing long-range and ultra-long-range missions, it is even more important and unparalleled.

The hose refueling system was originally born, and this kind of air refueling method is adopted in major powers in the world. Although the technical structure is simple and easy to disassemble and assemble, each set of devices can transport 1,600 liters of oil per minute, and a refueling machine can be installed several sets, which can refuel several aircraft at the same time. However, when refueling, the hose will float due to the influence of the airflow in the air, and the oil transfer efficiency is low, and it can only be used for refueling fighter jets.

Hard pipe refueling system, the refueling pipe is hard, has good stability and easy docking. It is suitable for air refueling for any type of aircraft. The maximum refueling can reach 6,500 liters per minute. However, due to the complex technical structure and only one oil receiver can be refueled at the same time, it is mainly used for large aerial refueling machines.

The hard tube refueling system is only mastered by the United States.

Generally speaking, when two refueling systems are used in a mixed operation on the tanker, the efficiency is the highest.

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

He also knows which way to cheer for the better?

The problem is that there is no technical reserve in China at all.

Even if the aerial refueling engine transformed by the American Boeing-707 is also not afraid to completely remove the entire aerial refueling system because there is only one such aircraft, processing technology and control technology cannot be achieved...

With Chinese technology, once it is disassembled, it will not be able to be installed at all.

Even many surveying and mapping work cannot be done because there is no suitable high-precision measurement equipment.

"At present, we still have time. Moreover, after the Y-10 has been flying for so many years, there is no need for us to use the H-6 as the carrier. The H-6 is too small! If the US aerial refueling system is disassembled, drawn, and then reprocessed, how long will it take to successfully produce it?" Liu Yijiu asked Sun Daogan.

"We don't have a three-coordinate measuring instrument. We have negotiated with foreign countries several times, but have not provided it to us and are not exported at all. There are also some top five-axis machining centers, and the five-axis machining centers produced by the Ninth Institute cannot achieve the accuracy..." Sun Daogan told the difficulties he has encountered at present.

Liu Yijiu's brows frowned immediately, "Don't we already have a three-coordinate measuring instrument in our country? The five-axis CNC machining center of the Ninth Academy cannot meet the accuracy requirements? Isn't this the case?"

"If it is machining, there is no problem. The key is a five-axis grinder. Many parts are processed by special curved parts..."

Five-axis CNC grinder, this is the top-level equipment of CNC machining center.

The Ninth Hospital has just begun research on this aspect.

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

Without equipment, the Ninth Hospital can also be produced, but the working hours are required.

"Handle the parts that need to be finished with a five-axis grinder to the high-precision processing workshop of the Ninth Hospital. In addition, a three-coordinate measuring instrument was mobilized from the Ninth Hospital. Is there any problem?" Liu Yijiu thought for a while and said that the aerial refueling machine must not be missed.

And there must be progress.

"This is no problem. If we can provide parts and three-coordinate measuring instruments, we can get them out within half a year!" Sun Daogan looked excited, "I can issue a military order!"

"I don't need you to issue a military order, I just need to see the results. Moreover, I need to be able to refuel at least six fighter jets at a time..." Thinking that when H-6 could only refuel two fighter jets at one time, Liu Yijiu felt so sad. "A hard pipe refueling system is installed at the tail of the refueling aircraft, and a hose refueling system is installed on the wings and belly of the aircraft. It is possible to refuel several fighter jets at the same time. In this way, as long as our air refueling aircraft is equipped with enough fuel, one can be provided to a squadron's fighter jet in the air..."

"This..." At the beginning, Sun Daogan and others had never thought about such a problem.

Even Hao Hongfei and others were confused.

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

"At present, the development direction of refueling machines in various countries in the world is mainly to overcome the impact of wing vibration, gusts and air vortex on the stability of the oil pipeline; to convert it into an aircraft with two refueling equipment; to improve the freight-speed refueling control system. These are also issues you need to consider. Only by using a hybrid aerial refueling method can you adapt to various tasks more flexibly."

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

"How difficult is it? Hasn't the hose refueling system been developed? There is also a hard pipe system, which doesn't take long. Just integrate the two systems. Although I know it's much easier to say than to do, if we don't do it, can we solve the problem if we don't do it?" Liu Yijiu said a little unhappy.

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

What else can you achieve if you are timid before you do it?

"Director Liu, this is not very suitable. You also said that we also need customer service to influence the vibration of the wings to make the performance of the oil pipeline more stable, and at the same time, we must improve the telex refueling operating system. Will the two operating systems on an aircraft occupy too much space and load? Even if the refueling engine can carry one ton of fuel, it sometimes plays a very important role!" Zhao Yunhai also frowned and asked Liu Yijiu.

The world's development trend is said to be like this, but it is just the US military that did it.

The Soviet Union did not consider this aspect. Their aerial refueling machines mainly used hose refueling systems, and did not have much impact.

After all, air refueling aircraft are mainly used for air refueling of fighter jets.

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

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

Whether it is China's fighter jets or bombers, the combat radius is really not enough, but there are no air tankers.

Logically speaking, China has higher requirements for air refueling aircraft.

However, China's foundation is too poor. It is not easy to make it aerial refueling engine with more powerful strength and advanced performance.

Even the matter of transforming a tanker from HVAC has not been solved for so many years. Now, it is obviously a bit inappropriate to think about this.

"So, we must consider the performance of our tanker, rather than just solving the problem of being and not being." Liu Yijiu emphasized. "As long as we create advanced technology, it doesn't matter even if it takes a little time to avoid it."

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

Hao Hongfei reminded Liu Yijiu.

To do this, time doesn’t matter, what’s important is that they need more funds.

...
Chapter completed!