Airshow China 2012. J-31 and its performance characteristics (full article Aviation Week)

Airshow China 2012. J-31 and its performance characteristics (full article Aviation Week)

Presented at the International air show in Zhuhai model stealth fighter actually similar recently promulgated J-31, is «cheap» and is intended for «the global arms market,» said representatives of the Chinese State Aircraft Corporation AVIC, says Aviation Week on November 19.
Were presented its main performance characteristics. This is a single twin-engine fighter with a high-wing, two-keel vertical tail with all-moving horizontal stabilizer. Normal take-off weight of 17.5 tons, length 16,9 m, height 4.8 m, 11.5 m wingspan aircraft has an internal compartment guns and aims to fill the niche of cheap stealth fighter in the world military aviation market.
J-31, which made the first flight on October 31, resettled with 2 RD-93 turbofans Russian production, which project engineers are not considered as important because they are not sufficiently strong cravings. These engines are installed on single-engine light fighters JF-17 (FC-1) competitor Chengdu Aircraft, have thrust 19,000 pounds (8300 kg). It is reported that the developer of J-31 Shenyang Aircraft company needs Chinese engines of development and production, so as not to depend on Russian exports fighters. Judging from the photos the layout on this plane can be installed engines larger diameter than the RD-93. May become a promising candidate WS-13A Taishan development AVIC Engine (factory Guchzhou).
In infy placed on a board, it is reported that the J-31 has a combat radius of 1,250 km (on internal fuel) or 2,000 km (with external fuel tanks). The highest rate of 1.8 M, the takeoff distance of 400 m, 600 m landing

J-31, as you know, the company developed in Shenyang Aircraft. In the past year, the company showed a similar pattern with the designation of the fighter F-60, on the plane of swirling under the tarp (presumably real glider) was transported by truck from Shenyang to Xian, where the Flight Test Center Air Force.
Designation «J-31″ may be less feasible as «J-20″ (heavy fighter development Chengdu Aircraft). From time to time J-31, also for unknown reasons, refer to as J-21. Layout J-20 was found at the end of 2010 and made the first flight in January 2011. But he was not shown in Zhuhai.

Airshow China 2012. J-31 and its performance characteristics (full article Aviation Week)

Airshow China 2012. J-31 and its performance characteristics (full article Aviation Week)

And this is the main piece of evidence on the status of J-31 — J-20 was not in Zhuhai, as this plane is not intended for export, and this is why China longs not open about it a lot of information. J-20 is designed for the Chinese Air Force.
In contrast, J-31 was exhibited in Zhuhai and is positioned as an export product, of course, the Chinese Air Force does not plan to take the plane into service. This niche already has Chengdu J-10 — middle-class fighter.
Why, then, J-31 was developed in Shenyang? There are a few guesses. This can be a technology demonstrator, funded by the Air Force, and the company believes in the long term that can develop it to the level of operational fighter for the PLA air force.
Maybe so that the J-31 is a development activities for the export market because Shenyang Aircraft implies. that not all countries can have access to the modern Western fighters. J-31 will be the main rival the Russian fighters, although Shenyang Aircraft, maybe also expects that some buyers Western fighters will be required to cross at J-31, because certain South American and European fighters come out of the mass production during this decade or later. Important to note that Chinese fighter jet should be a cheap, as the JF-17, but having a «prestigious» stealth technology.
Shenyang Aircraft working on building naval fighter, possibly in the future J-31 entered service carrier «Liaoning» and his successors. If so, then perhaps deck option will not be exposed to extensive review, as well as J-20 for the Air Force.
The difference in size between the J-20 and J-31 indicates that they may not have been created for performing the same requirements.

While the layout or technology demonstrator J-31 flies, the main question is how significant progress has been made in the development of stealth technology. Another problem for the Shenyang Aircraft and its suppliers is to develop avionics indicator merging with the picture from different sensors to form a complete picture of situational awareness for the pilot. AVIC statement that the ability of J-31 in this area is «almost equivalent» F-35, says that she has already done some work in this direction.
And yet, there is a big difference between the way the fighter looks, and the fact, that this fighter really had all the skill-set of operational combat vehicle. The F-35 entered service after almost 20 years as a technology demonstrator X-35 completed the first flight. Likewise, the same can wait and J-31, in other words, it will need a huge time before reincarnate «naked plane» at the export product, but this time the Pakistan Air Force will operate the JF-17.
Immaturity avionics may be a prerequisite that the J-31 is exposed as a promising export plane, although it looks like the size of the J-10’s successor and as more affordable addition to the park for future J-20. But the PLA Air Force fully may decide that the Chinese industry has quite the modernization of the J-10 and integrate systems for J-20. But another prerequisite may be that in Shenyang or Chengdu prepare something more promising than the J-31. If there is no exact answer reappears question: why the Chinese Air Force unwilling J-31?
Configuration Overview J-31 indicates that the designers may develop stealth aircraft, but do not lose sight of its configuration as a function of ordinary fighter with guns outer suspension, and did not aim to achieve supersonic cruise flight mode nonafterburning both the F-22 . Configuration dvuhkilevoe chamfered vertical tail stabilizer and shape shows that designers want to connect a low ESR requirement merits huge aircraft angle of attack that is difficult to achieve equilibrium configuration with front canards («duck»).
The rear part of the aircraft is close to the center of mass, perhaps it makes it easier to design the inner compartment and assists those guns versatility. The model has a moderate wing sweep on the front edge. To minimize reflections of radar signals vozduhopoglotiteli engines do not have adjustment plate boundary layer. Volume bow small, it is possible to place the antenna radar small diameter.
For all own regular Chinese military secrecy in Zhuhai for the first time showed two types of attack helicopters.
1st — Z-10 (or WZ-10), which was characterized as the Chinese media crotch size car compared with the Eurocopter Tiger and Boeing AH-64 Apache. This helicopter is a product of the helicopter department Avicopter of AVIC.
2nd — Z-19 (Z-9 adaptation and, ultimately, a copy of Eurocopter AS352 Dauphin, but with a new fuselage and tandem pilots) must have take-off weight of 4-5 tonnes, slightly less than the Z-10. Harbin Aircraft (also part Avicopter), builds helicopters AS352 Dauphin. These helicopters were performed under license, which expired during the act, they say representatives of Eurocopter.
Both types of attack helicopters designed for Chinese engines, but it is clear that very little, some of them — Z-10, in the development process was equipped with foreign engines.
Helicopter Plant in Harbin also developed an assault version Z-9, which has kept its «bulky» base cab cars (placing pilots shoulder to shoulder). In July, the Chinese army showed rare pictures of the last version of the machine Z-9WZ.
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