Do not wait too long: Chinese fourth generation fighter passed the final sprint!
not wait too long: Chuan Chinese fourth generation fighter to enter the final sprint!
the authority of the message from the group claimed that the “fourth generation machine,” is about to enter the wind hole pilot phase, and has been developed for some time. From Chinese sources involved in the “fourth generation machine” developed by the time estimated that “good progress” that their corresponding ample funds, the Russian fifth generation fighter aircraft does not appear as difficult financial situation. Meanwhile, the basic concept design completed and ready for or has entered a phase of wind tunnel tests. While those from Western intelligence claims that “fourth generation machine” in the late 1990s it has been approved.
by the existing master of the “fourth generation machine” developed state judge, the aviation industry reform has already led to the development of China’s military machine has entered a new stage. System management approach developed ﹑ close to the U.S. trend. First, the group has been formed within the competition. Design, the concept of wind-tunnel test stage using the plural program evaluation practices. For example, the Shenyang Aircraft company, so far out of a total of two “four-generation machine” stealth program.
China’s fourth generation machine vision chart
in Chengdu Aircraft Company also took out the internal double J10A J10A single stealth stealth ﹑ ﹑ new light stealth fighter program. Even with the Shenyang “heavy fourth generation machine” concept developed by the same, Chengdu’s new fourth generation light stealth machine may also be two options.
from Shenyang, sources claim two kinds of four generations of computers will be invisible wind tunnel tests. The future development of heavy-duty fourth generation machine will further follow the path of the United States YF22 and YF23, also introduced two models of the testing machine until the Air Force flight test phase of the tender is worth further observation.
four generations of machines may be used by the further improved or modified after AL31F WS10A turbofan engines made to determine trends, twin four generations of the Chinese Air Force’s basic dimensions and F22 machines should be close. In other words, taking into account the need for stealth-based, four generations of machines will not have SU27 large size, close to F15 and F22 standards. China open wind tunnel test model of the two also showed that both the size of four generations of machines should be 18 meters long, 5 m level, high-level full-frame 13 m level ﹑ level. Level of 15 tons weight may ﹑ 30 tons total weight.
in the mobility and stealth of the reaction between the prominent concept of mobility in the wing design and so on. Two kinds of Shenyang four generations of machines is very close to the traditional wing, similar to the F15′s fixed-wing plane ﹑ angle triangle shape of the knife. F22 for the butterfly on the wing leading edge sweep angle of 42 degrees, forward-swept trailing edge angle of 17 degrees. Design YF22 once reached 48 degrees leading edge sweep angle, thus further reducing the clear purpose of leading edge sweep angle is to improve the ground radar can not detect, while reducing the resistance, is conducive to mobility.–
YF23 characteristics of butterfly wing on the trailing edge by increasing the angle of forward-swept wing approach reduces the overall area, more obvious stealth characteristics, supersonic cruise capability is doubled. Increased compared to F22′s wingspan 13.56 meters, more than YF23, F22 to increase the aspect ratio of the resulting low-altitude subsonic cruise efficiency ﹑ ﹑ significantly higher in low-speed maneuverability YF23.
U.S. Air Force F22 still choose the reason for this lies more attention to mobility needs. After all, the future after the unsuccessful first strike, F22 still need a strong SU27 with mobility capabilities for close combat. Andrei Chang that the stealth of a better mobility and better YF23 defeated more YF22, a good illustration of four generations of machine development.
two of four generations of Shenyang Machine design is even more emphasis on mobility. Very close to the wing design, leading edge sweep angle of 48 degrees, and the design of the YF22 quite. Forward-swept trailing edge angle of 0 degrees. Aspect ratio is clearly greater than the F22, so, subsonic low-altitude low-speed efficiency of ﹑ may better F22. Symmetrical wing, horizontal tail sweep angle for about 48 degrees, with the wing shape is almost the same.
Shenyang in the fourth-generation stealth machine ﹑ 8000 between mobility and further focus on mobility focuses on the design of the Air Force is clearly with the current stage of China’s overall strategy has a significant relationship, after all, the Chinese Air Force and there is no “global reach “The operational intent, both offensive and defensive thinking is still prominent part of homeland defense. “Attack” just more factors to take into account the need to attack Taiwan. However, four generations of machines have F22 or some invisible features. Including wing integration. Two kinds of four generations of machines are designed with a band edge of the wing inlet, the inlet for the diamond-shaped design.
one of the program’s intake and body maintain a 29-30 degree slope, very basic and F22, so the shape is more close to the F22, this perspective inference, Shenyang, four generations of machines outside of twin vertical tails tilt angle is 30 degrees. F22 twin vertical tails tilt angle 29 degrees outside, twin vertical tails are extended to peace tail behind the engine nozzle to block infrared radiation. Shenyang four generations of machines does not seem to use this layout. Engine nozzle seems to extend to the outside. How to reduce the infrared radiation? Chinese designers are likely still being appropriate.
After all, just open a wind tunnel model. At the same time, four generations of machines will be used in vector technology and F22 propulsion engines are different. F22 nozzle used to promote the implementation of the vector vector 20 degrees up and down adjustment. And China to open new vectoring nozzle 360 ??can be implemented vector adjustment. Therefore, only the engine nozzle extension, at the expense of stealth in exchange for more mobility and strong power system.
At the same time, the J10A development has seen in recent years, China’s aviation breakthrough composite technology has begun. Estimated that four generations of machines in Shenyang will use more composite materials. Not even 24% lower than the overall standard F22. As the weight of broadly similar design F22, the improved AL31F (117S) will reach 15300kgf levels, the Shenyang four generations of machines will be thrust-weight ratio of 1 or more.