Chapter 911 (2/2)
Bao Zixuan said with a smile, ”this is a software developed by heiyun. Most aircraft in the world have technical parameters and shapes. As long as we want it, we can easily tune it out from the database. However, this computer is not linked to the central computer cluster and can only be used as a stand-alone computer at present. Therefore, the ability is limited, but it can also meet the requirements of senior students. ”
I heard that the black cloud database already has the data of most models in the world, and engineers can call it out at any time. Old William was shocked again. He had led McDonnell Douglas and even American aircraft manufacturing companies in terms of work efficiency alone.
At present, major aircraft manufacturing enterprises in the United States still use manual drawing. Xiangjiang company in the industrial desert actually uses computer graphics. You know, the computer was invented by Americans, but now it is carried forward in the hands of Xiangjiang people. This is simply an irony. Major American universities, scientific research structures and high-tech companies should really reflect on it.
Old William: ”as you said, the nose should adopt diamond structure. The circular radar reflector is too large, which is not conducive to stealth. ”
After saying that, I saw baozixuan operating on the computer. The three were stunned; At this time, not only Debbie Dickinson and old William, but also Janice Dickinson joined the small circle after taking good care of little MacDonald.
Baozixuan's hand speed is so fast that several people can't see clearly.
In less than a minute, the diamond nose has been designed.
See so quickly, and there is no trace of the previous image. Old William felt incredible that McDonnell Douglas must get this software and pay a price.
But now is not the time. First, we need to make a comprehensive understanding of the specific performance of the software and make a decision.
Old William: ”the fuselage should adopt flat integration, while the wing adopts diamond structure; And use a tilted tail. ”
At the request of old William, baozixuan manipulated the computer again.
After a while, according to the requirements of old William, the basic model of the aircraft has been designed.
After that, they began to build the aircraft around the details and began to continuously improve the structure and function of the whole aircraft.
Seeing a plane designed like this, the Dickinson sisters began to see little stars in their eyes. It turned out that Polytechnic men were so charming that they were really ignorant before.
When the basic details of the aircraft have been built, the aircraft is displayed on the computer screen.
After seeing the plane, baozixuan remembered a classic model that had not been in service in his previous life - yf23; Black widow.
Yf-23 fighter, nicknamed black widow, is a test fighter model jointly designed by Northrop and McDonnell Douglas in the 1990s to bid for the Advanced Tactical Fighter (ATF) contract. Later, because the US Air Force announced that the YF-22 was the winner. Yf-23 fighter has produced only two prototypes, and they are no longer flying.
The first prototype of the previous yf-23 left the factory on June 23, 1990 and conducted its first test flight on August 27. The first YF-22 will not leave the factory until August 29; The first test flight was conducted on September 29. On the 5th test flight on September 18, yf-23 achieved a supersonic cruise record of Mach 1.43 without afterburner, while YF-22 reached Mach 1.58 on November 3. The second prototype of yf-23 was delivered on September 29; The two prototypes use different engines: the first prototype uses Pratt & Whitney yf119, and the second prototype is Ge yf120, which is just upside down with YF-22.
The design concept of yf-23 prototype is very different from that of YF-22. In addition to using many existing components, the flight test plan of yf-23 does not include the test firing of air-to-air missile and the verification of high angle of attack flight capability. Most of the data are collected and verified by wind tunnel test. According to the test results, yf-23 has no angle of attack limit, and the aircraft can easily resume stable flight from any spiral. It will be difficult only when the missile cabin door is open.
Yf-23 conducted a total of 50 flight tests for 65 hours. The maximum flight speed reached Mach 1.5, the maximum load reached 7g and the maximum angle of attack reached 25 degrees.
Compared with YF-22, yf-23 has a longer fuselage. It adopts a single wing. The front and rear edges of the wing sweep back and forward 40 degrees respectively, similar to a diamond. There is no horizontal control plane behind the fuselage, and two vertical control planes inclined outward by 50 degrees are used to replace them.
The air inlet is located below the fuselage near the leading edge of the wing. Both the air inlet and the air inlet adopt fixed structure and have no movable part, which can not only reduce the weight, but also avoid increasing the front radar reflection cross-sectional area. The air inlet bends upward inside the fuselage and is connected with the engine on the back of the aircraft. The nozzle is located in the middle of the outward inclined vertical control surface. The nozzle can not be seen directly from the rear and lower, which reduces the intensity of the infrared signal and limits the feasibility of installing the vector nozzle.
It seems that old William must have participated in the design of yf-23 in his previous life, otherwise it would be impossible to design the aircraft like this. Only because the performance is too advanced, or to balance the needs, it finally lost the election. It may be a pity, which is why the old man is not widely known.