Shenyang FC-31 / J-31 Fighter Demonstrator

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Air Force Brat

Brigadier
Super Moderator
but the j31 dont use the external weapon stations evertime?!

is the J-31 on the technical level of the F-35?

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No, but it likely will have external hardpoints like most modern fighter aircraft, they are removable.

No, the F-35 is the most advanced fighter aircraft ever designed, in fact too advanced, but that's water under the bridge, the J-31 is built to be the equivalent of the F-16, F-18 class aircraft. They have made a decision to "fill that gap" with a capable, but not overly complex aircraft, by choosing this class of aircraft, they are NOT in competition with the J-20 which will be very expensive, (think F-22), but will be much cheaper to "develop" and acquire in numbers, what they must do is produce a viable and capable aircraft to fill that gap!
 

Jeff Head

General
Registered Member
Hi ... and I try to be polite: I have some problems to understand You correctly. :confused:

Anyway, there are no WS - at least no Chinese WS-series engines - on any of these two fighters: The J-20 is powered by a version of the Russian AL-31FN (maybe series III) and the J-31 uses RD-93. (Or maybe You simply meant WS in the maening of "turbofan engine" !??).

Deino
I think he meant WS to stand for "Weapons Stations". At least that was how I read it.
 
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vesicles

Colonel
No, but it likely will have external hardpoints like most modern fighter aircraft, they are removable.

No, the F-35 is the most advanced fighter aircraft ever designed, in fact too advanced, but that's water under the bridge, the J-31 is built to be the equivalent of the F-16, F-18 class aircraft. They have made a decision to "fill that gap" with a capable, but not overly complex aircraft, by choosing this class of aircraft, they are NOT in competition with the J-20 which will be very expensive, (think F-22), but will be much cheaper to "develop" and acquire in numbers, what they must do is produce a viable and capable aircraft to fill that gap!

I still think the F-22 is the most advanced, way better than the F-35.
 

Jeff Head

General
Registered Member
I still think the F-22 is the most advanced, way better than the F-35.
As with all modern aircraft (including the J-20 and J-31) it depends on what you are talking about.

When it comes to air superiority, including all of the huge advanategs the F-22 brings to the table like it's BVR capabilities, its own manuverability, its IR and Radar Stealth, Supercruise, etc. well, in those conditions) then yes, there is no doubt that it is.

However, when it comes to situational awareness, network-centricity, newer, more modern electronics, its attack capabilites, etc. then the F-35 takes the upper hand, whioe also bringing (as a result of those things and its own weapons) a very decent VBR and close-in air-to-air fighting capaility.

All of these can be used by either aircraft to great advanatge. For example, imagine a future large strike package that the US Air Force might launch against an adversary that consists of say, twenty-four F-35s escorted by eight F-22s. That would be a very, very difficult threat to deal with.

I suspect, should the J-31 be brought to production for the PLAAF, that a future package of similar size consisting of J-31s and J-20s would also be an extremely difficult threat to deal with.

Anyhow, just some thoughts.
 

Air Force Brat

Brigadier
Super Moderator
I still think the F-22 is the most advanced, way better than the F-35.

Of course you are correct, the F-22 will remain the worlds foremost air superiority for the foreseeable future, in fact rather than pursue a sixth gen, we should use the lessons of JSF to upgrade the Raptor for the second half of the next century, as it could be vastly improved by simplification and upgraded avionics. In my personal opinion, Shenyang is following this tactic with the J-31, a kind of 7/8 reproduction of the basic Raptor airframe, utilizing "mass centralization" and a sufficiently robust airframe to move it to the head of the class in Air to Air maneuverability. What many miss is that relaxed stability is a fine tool for the first pitch transition, maybe for the second or third, but mass centralization, light weight and small size will translated into a very agile airplane.

The J-31 wing, and fuselage look similarly proportioned to the F-15, F-22, and the lifting body fuselage predict a lighter wing loading than say the F-35 or even the J-20,,,,,, the pragmatic view would ask the question, what changes directions more quickly, a ball or a stick, OVT will NOT be necessary, the real reason that F-15s, F-16s, and F-18s have NOT been retrofitted with OVT. I would remind everyone that the F-16 FBW would NOT allow that aircraft to be flown to its pitch limits, because it would put most pilots to sleep, those limitations have been removed as pilots have been enabled to tolerate higher gs in general.
 

Inst

Captain
Comparing the J-31 to the F-35, the answer is best described as "we don't know". The J-31 is only at its prototype stage, and final specifications for the J-31 have not been disclosed. The rough difference between them, however, is that the J-31 is going to have better aerodynamics, as compared to the F-35, the J-31 will have a smaller wing loading, and if targets for take-off weight are achieved (an amazing 17,500kg, which is much less than that of the F-35's 23,000kg), the J-31 will have a dramatically better thrust-to-weight. Rumors also suggest that the J-31 will opt for TVC, but there's no concrete evidence of that.

The advantage of the F-35, however, will lie in its avionics and sensors. Independent of all other factors, the US is usually at least one generation ahead of the Chinese when it comes to sensors, and the F-35 will probably have a more capable radar than on the J-31, probably with the F-35 using Gallium Nitride AESAs for greater power output while the J-31s will likely be using Gallium Arsenide AESA for quite some time. Beyond that, while China is known to possess EODAS and IRST technology, we've only seen that on the J-20, and there's been no indication that the J-31 will be designed to operate and utilize EODAS and IRST. That's not to say that the final versions of the J-31 couldn't utilize EODAS or IRST; the program is just at a rather early stage and there's been no such indications as of yet.
 

valapak

New Member
mutch people said, that the J-31 is build with hacked us data from Lockheed Martin...
So, when the chinese military hacked the company, they got very "good" informations for a copy of the F-35
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so it probably will be on the level of the F-35 (technical)

perhaps, the J-31 will not be a mass product, because we see how "GOOD" the F-35 is. (very bad stealth coating, bad stealth capabilitys, HMD dont works, not enough fuel, slow speed, problems with the radar, too mutch maintenance need)

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but the J-18 is more similar to the F-35.
J-18

j18.jpg

J-31

China-J-31.jpg

F-35

lockheed-f35-lightning-ii_30.jpg

is somewhere a J-18 Thread??
 

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Inst

Captain
The F-35 is not as bad as advertised; there are some key design flaws with the F-35, for instance, the aircraft layout resulted in two separated weapons bays, which increases the aircraft weight and reduces its payload capability, and the F-35 is not designed for cutting edge maneuverability; it's designed to use a combination of sensors, active, and passive defenses to defeat enemy aircraft in WVR.

The last remaining advantage the J-31 has over the F-35 is that the J-31 has a larger and unitary weapons bay. The F-35, due to its single-engine design, maintains two separate weapons bays with a maximum munitions length of about 4.3 meters. The J-31, on the other hand, maintains a single weapons bay with a bay length of around 4.7 meters, allowing the J-31 to carry not only more, but also more capable munitions than the F-35. For example, with some modification, the Kh-15 Kickback will fit in the J-31. That's a 300 km range missile with a supersonic terminal trajectory. Compare the Joint Strike Missile, which also has 300 km range, but is subsonic throughout its flight path.

==

Also please do note, the J-18 likely does not exist and is a rumor used to make fools out of overly enthusiastic fanboys. Chengdu is working on the J-20 project, while Shenyang is working on the J-31 project. There is no one left to work on the J-18 project, and China doesn't have much to gain from STOVL stealth fighters. Unlike the United States and Japan, China does not have a significant fleet of light carriers from which to operate STOVLs, whereas the United States has more than 9 light carriers and Japan has helicopter carriers that can be converted to operate F-35Bs.
 
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