Chapter 916

The technology of ground effect aircraft can not be said to be very advanced, and the Soviet Union, China, Saudi Arabia and other countries will soon master it. We can exchange some good things with Americans while there is still a little value.

With the scientific and technological strength of Americans, people are not unable to develop it. However, at present, the major companies in the United States have not eliminated their differences and can not concentrate their efforts together. Of course, they are all private enterprises, which has a lot to do with the difficulty of integration. The United States is an immigrant country with too many camps.

This is also the reason why several technology towns have not been fully formed in the United States. It is estimated that the final result will not be very good, or even become a joke.

F-15 fighter; Nickname: American Eagle, is the third generation supersonic jet fighter of the US air force.

The F-15 fighter adopts a tandem two seater swept wing aerodynamic layout and is equipped with two turbofan engines, with high maneuverability. The aircraft has perfect all-weather combat capability, can use advanced medium range air-to-air missiles to destroy enemy aircraft, mainly carry out air superiority combat tasks, and develop air-to-ground combat modifications.

The F-15 fighter was developed by McDonnell Douglas and developed from the F-X program launched in 1962. It won the bid by McDonnell Douglas in 1969. It was first tested in July 1972. In 1974, the first mass-produced fighter was delivered to the U.S. air force. It has been in service for more than 40 years, with a total production of more than 1200, dozens of modifications and exported to six countries. Took part in more than 100 wars and shot down more than 100 enemy aircraft. In the early 21st century, it was successively replaced by F-22 fighters.

Even in later generations, the F-15 is the most successful heavy air superiority fighter. The height matching of F-15 Eagle and F-16 Falcon fighters is very successful, which can be said to be the guarantee of the United States' foreign air control.

McDonnell Douglas has so many excellent military aircraft such as F-15, F-18 and C-17 that it was finally acquired by Boeing. I don't know what little MacDonald did. It's understandable to say that he is the first loser in the United States.

At this time, for Americans, the status of the F-15 is very important and it is difficult to get it.

Based on its high price, in addition to the United States, only Israel, Japan, Saudi Arabia and other countries used it in the early stage, followed by Singapore and other countries. In addition, there is the f-15k sold to Korea based on the F-15E, which is the first F-15 using GE engine. Before that, the F-15 used Pratt Whitney engine.

At this time, little MacDonald acted as a commentator and said to Bao Zixuan, "the fuselage of F-15 fighter is an all metal semi hard shell structure, which is composed of front, middle and rear sections. The front section includes the head radome, cockpit and electronic equipment cabin, and the main structural material is aluminum alloy. The middle section is connected with the wing, and some titanium alloy parts are used to bear heavy load, accounting for about 20.4% of the weight of this section. The first three frames are aluminum alloy structure and the last three are titanium alloy structure. The rear section is a titanium alloy engine compartment. The flat tail of the serrated leading edge is a fully moving flat tail with a large area, which can meet the needs of high-speed flight and maneuver. "

"The wing design adopts a truncated triangular wing shape, which can improve the wing structure and increase the internal volume of the aircraft. At the same time, it can make the increase of the aircraft's resistance in the transonic region more gentle, and the movement of the aircraft's focus in the transonic region is also small, reducing the trim resistance."

"This is definitely the most advanced fighter in the world, and there is no one. As for the F-14 panda fighter produced by Grumman, it is still far from him. "

"However, this is an absolute secret of the US air force. As a manufacturer, I dare not easily promise anything. I hope you can understand."

The American Eagle is not barking in vain, which is why old William would rather provide black cloud with some production processes and details of F-18 fighters than mention F-15.

Bao Zixuan said with a smile, "every company has its own difficulties. Moreover, military products have never been decided by a company."

"Coming to McDonnell Douglas this time is really an eye opener. It seems that heiyun group still has a long way to go."

Little MacDonald replied, "I can't say that. Black clouds are much better. At least the government won't intervene excessively."

In fact, this is true. The British would never have thought that the development of Xiangjiang black cloud group would be so fast. I can't believe it. At the same time, it doesn't seem so real.

According to the bill signed before, Xiangjiang has strong autonomy in the commercial field and is a famous international trade free port.

But that's just for ordinary goods, which also applies in Britain. Who would have thought that there could be such an adverse company as black cloud in Xiangjiang desert of science and technology. Before the bill is amended, the black cloud group can only sell weapons and equipment to any country in the world.

Maybe Batumi can restrain it, but Xiangjiang is also in the embargo area of Batumi's high-end precision instruments. Is it necessary to let its country not transport precision instruments to Xiangjiang, and at the same time let heiyun group not sell weapons, equipment and mechanical equipment to countries within the scope of the ban. There is no such truth in the world. People can ignore it completely.

Now Batumi is also one head and two big. I don't know what to do. At present, the prohibition bill is being revised to include Xiangjiang in the same treatment as Britain.

Bao Zixuan: "I've seen it and have it. I didn't say that I must take the technical data of this aircraft back to Xiangjiang. And every company has core secrets, which is the capital for the enterprise to settle down. "

"You can look at others. McDonnell Douglas should have a lot of good things!"

A ghost fighter bomber similar to heiyun HH-01 appeared in front of him, which surprised baozixuan. Because according to historical development, this failed model should not appear.

A-12 attack aircraft is a stealth attack aircraft developed by McDonald Douglas and general dynamics. It is the first attack aircraft designed by the U.S. Navy to go deep into the enemy's territory for long-range strike missions. It is also the first stealth carrier based aircraft invested and developed by the U.S. Navy. The U.S. Navy plans to replace the long-serving a-6 intruder attack aircraft, and the U.S. Air Force also plans to purchase to replace the F-111 Aardvark strike fighter that has been in service since the mid-1960s. However, due to budget overruns, excessive body weight and delayed development schedule in the development plan, U.S. Secretary of defense Cheney announced the termination of the whole R & D plan in the 1990s.

The A-12 originally planned to replace the a-6 attack aircraft in the mid-1990s, using stealth technology that is said to be far more advanced than the air force F-117A. At the same time, the payload capacity is far greater than that of the "Nighthawk". Compared with the a-6e, the A-12 is faster, has a longer range, and can carry a large number of weapons in the internal ammunition cabin to reduce drag and maintain a low radar cross-section shape. Like the ATF, the A-12 is expected to be more reliable than existing aircraft while requiring only half the maintenance man hours.

In terms of specific indicators, in addition to good stealth performance, A-12 is also required to have an operational radius 60% larger than a-6e and a bomb load 40% higher. Low altitude horizontal acceleration performance, instantaneous circling angular velocity and maximum circling angular velocity are better than a-6e. Even the maximum circling angular velocity is equivalent to or better than that of f-18c. In the case of ground attack, the area of the target surface based on the 23 mm anti-aircraft gun detonation bomb shall be equivalent to A-10 or only 1 / 12 of a-6e and 1 / 5 of f-18c.

Little MacDonald smiled and said, "McDonnell Douglas and general dynamics started the research and development of stealth aircraft as early as 1981, but they were not so anxious at that time. We didn't speed up the research and development until we saw the great success of the black cloud HH-01 ghost fighter. "

Hearing this, baozixuan fully understood. At the same time, he also knew that it was because heiyun had HH-01 ghost fighter that little MacDonald dared to bring him here. Ordinary partners are worried about the problem of disclosure, and they don't have so many scruples about baozixuan. After all, black cloud has already reached the forefront of the world in terms of stealth bombers, and may be able to put forward some valuable suggestions.

Baozixuan knows that A-12 is troubled by the wide use of composite materials in structure. The composite did not achieve the expected weight reduction effect. Because it could not meet the requirements, some components had to be replaced by heavier metal parts. There are too many openings in the skin of the aircraft abdomen. The two wing beams bear a great load and must be strengthened. The composite materials should also be specially thickened, which requires a lot of improvement. The weight of the aircraft is more than 30 tons, and the aircraft is 3630 kg overweight, 30% heavier than expected, approaching the upper limit of carrier borne aircraft weight. In addition, it also encountered difficulties in the complex inverse synthetic aperture radar system, and the development of advanced avionics has been delayed in an all-round way.

Like the DC-10 three engine airliner, the A-12 project is doomed to failure. However, black cloud already has HH-01, which is enough at present; McDonnell Douglas's A-12 let them play by themselves.

At the same time, I also understand the reason why little MacDonald plays poorly with good cards. With so many failed projects, the F-15 and F-18 don't earn enough money to paste in.

After that, baozixuan visited the production lines of F-18, A-4 and other aircraft, which can be regarded as a comprehensive understanding of McDonnell Douglas; At the same time, he was shocked by the details of American aircraft manufacturing companies.

If an acquired McDonnell Douglas can do so, what will more powerful Boeing, Lockheed, Pratt Whitney and general dynamics look like; I can't imagine.

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