Shenyang FC-31 / J-31 Fighter Demonstrator

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Blitzo

Lieutenant General
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That would indeed by the case if you want the two planes to have similar performance. However, if you were willing to accept lower performance, having one engine instead of two in the same sized airframe would leave you greater remaining internal volume for other things like fuel and bomb bays etc.

OH, so we're talking a twin engine sized fighter with only one engine? Hmm that changes things, I thought we were talking about a F-35 sized single engine striker.

The point I was making was that do you really need your stealth striker to be able to heft 10 tons of ordiance when it can only carry 2-3 tons internally?

The US needs that because they are going full stealth and will have nothing else to use as bomb trucks once the enemy's defenses have been taken out.

I actually didn't consider that, but I was more advocating the twin engine approach because of the greater range, size/volume it offered, along with potential for supercruise (see below) rather than the total payload it could haul.

However, since I do not think the PLAAF will want to go all fifth gen, why not lower the design requirements for the stealth striker to internal load only? Without needing to worry about massive external loads and cutting-edge dogfighting capabilities, it should be possible to get very decent range out of such a plane. It will be screwed if it ran into an F22 or superflanker in WVR, but then so would an F35 so are you really loosing that much? Besides, with the cost savings as a result of the relaxed requirements, you could afford more J20s to ride shotgun and go take care of any enemy planes that post a threat to you strikers.

Ah I just realized I forgot the fact that my vision of a twin engined striker would have supercruise as well -- commonality with the J-20 in engines, but less capable A2A avionics.
Maybe I've been taking carlo kopp too seriously but I feel a striker, if it's to be used for first day door breaking, penetrative strikes, should have supercruise to increase survivability and lower response time. To futureproof it, design a large internal volume to carry larger radii weapons than a couple of FT series bombs would be beneficial as well, not to mention the plane could (and should) be used for hard to crack anti ship missions as well.

Think of this as a modern F117+ in that it will only fly with internal loads, but could also have modest AA and supersonic capabilities.

The PLAAF could get a decent number of them without breaking the bank for first day of war, and high risk missions, and once the stealth striker has cracked open an enemy's defenses, the likes of the MKK and JH7A can move in with the heavy loads and really start to pound them.


That is pretty much what I was thinking in terms of mission. But I question the need for a heavy, top performance expensive plane. Range you need, but that could be achieved by cutting the weapons load requirements as mentioned before. With modern weapons becoming ever more compact, you no longer need a massive weapons load to take out a lot of targets.

Hmm that makes sense, but I remain reluctant, mostly because even though the less capable striker (I'm gonna call J-2X) may be cheaper and able to be purchased in large numbers, they're still individual 5th generation planes with the maintenance problems 5th generation fighters come with. If J-2X has a similar stealth coating to "J-19" the costs of having twice or three times as many numbers of proposed J-2X for J-19 could quickly add up in terms of maintenance, specialized basing etc.


With war, there will also be the inevitable losses you need to deal with.

If you have one plane going after one target, loosing a plane before it can launch weapons means one enemy target not hit. If you have one plane going after several and the same thing happened, that is several enemy targets you wanted dead still alive and kicking, and that will pose a much bigger threat of your follow-on assets and overall battle plan.

With a small number of heavy strikers, each loss will also hurt a lot more than if you had more cheaper strikers.

That is true, but what if you invested more into each heavy striker than a cheap striker to make them more survivable so it'll be harder to lose them in the first place? Give them the necessary engines and fuel load for long supercruise transit.

I do see the benefit of larger numbers of less capable strikers compared to smaller numbers of more capable strikers and vice versa.

I know it goes against the grain a little when multi-role is all the vogue these days, but the PLAAF is one of the few remaining air forces that could afford speciality, and I feel that cutting some largely redundent or non-critical requirements would allow you to build a far more capable and effective overall air force with the same amount of money instead of wanting top-of-the-line for everything.

Agreed, and I think both our striker suggestions hold to this.

I'm not sure where the proposal came from, but I know that if I was in charge of SAC, I would drop the failed XXJ proposal and come up with a brand new design.

If the PLAAF already rejected a design, slapping a JH instead of J in front of it and making small changes to make it into a striker instead of a fighter is hardly going to make the PLAAF less inclined to reject it again.

I'm not sure about that. PLAAF may want to give SAC another project to work on beyond their tinkering with flankers -- and I feel SAC isn't the who we should give a single engined medium 5th gen, large order project to. Political considerations aside, SAC could certainly do a good job of turning their failed J-Xx proposal into a striker imho, because they'll be selling it as a striker not the standards PLAAF set for J-XX. If they can convince PLAAF for a need of a striker and CAC is too busy with J-20 and/or unable to produce a variant of J-20 to compete... there's certainly a good chance.
It depends on what kind of force composition we're thinking for PLAAF I suppose. And a J-19 could have potential for carrier variants too especially if it has a more conventional configuration compared to J-20 -- there will be a tender for a heavy 5th gen carrier fighter in due time.

Since the PLAAF has already chosen the J20, then that is where the lion's share of the future fifth gen budget is going. As the old Chinese saying goes, there is no room for two tigers in the same mountain. If the PLAAF is looking for a hi-lo mix for fifth gens, the high end of that equation has already been met, so another high design is likely to get rejected on principle. That means you are playing for a completely different cake, so using the same design approach as that for the XXJ is plain stupid and lazy.

The new top goals are going to be affordability and commonality. You need a plane cheap enough that the PLAAF can afford a useful number with what is left after the J20 has taken it's cut of the budget. That means deep capabilities cuts to meet the cost requirements.

I'm actually thinking of the striker along the lines of FB-22, albeit with slightly greater maneuverability traded for slightly smaller bombload with the J-20 to make up a collective "air superiority and strike" high.
Basically in my mind the PLAAF will not have a hi-lo mix of fifth gens alongside it's massed fourth gen fleet, but a hi low mix of high capability fifth gens and low capability fourth gens.

Think of something with 1000km+ range on internal feul, with all the BVR advantages stealth provides, modest WVR supplemented by HMS and next gen WVRAAMs and able to hold a couple of thousand pound bombs internally, all for the price of a late block F16. I can think of a lot of countries that would be interested if SAC could come up with something like that.

An attractive idea indeed -- but supercruise and replacing those two bombs with ARMs or AShMs would be better. In my mind the future striker would have a role in anti CVBG/SAG/anti ship missions as well. Especially with the way F--35 turned out, I feel like having provision for carrying larger weapons internally is just as important as stealth.

my counter proposal, a fighter with 2000+ km range on internal fuel, BVR advantages of stealth, airframe optimized more for speed than maneuverability, twin WS-15 for supercruise, WVR or BVR missiles with HMS, and able to hold two KD-88/AShM sized missiles internally (a variant with folded wings)/or equivalent number of thousand pounders, SDB + side weapon bays which can hold an A2A missile each. To be acquired in relatively small numbers.

I see the benefit of both proposals, it's a question of quality/quantity if we're forking the same upfront price. though I think a larger fighter leaves more room for growth and would be more flexible and capable too which can make up for the cost of losing one J-19 compared to J-2X. Especially if J-19 has supercruise and is harder to shoot down in the first place. but then again maybe I'm just biased because I like the F-111 and FB-22 too much.


This is all fun speculation, we'll see what SAC offers sometime this year hopefully. I'd like to know whether the source of this single engined SAC fighter has proven reliable in the past. Huitong is currently sticking with his twin engine J-19 theory so hmm yes.
 

hmmwv

Junior Member
A single engine stealth multirole figther is a very bad idea. The weapons load will be very low.
It is strange that all the cgi we are seeing about J-19 show two engine fighter.

It's essentially a cheaper F35, not meant to carry a large load, it's role is to pave the way for J16. China cannot afford to develop or equip two heavy stealth planes, unlike the F35 I don't believe J19 is designed to replace all conventional PLAAF fighters and attackers, just like the J20 will not replace J10/J11. In a future conflict J19 and J20 will be vanguard of a strike force, hunt down enemy high value aero assets and disable key air defense installations. Once the enemy is suppressed J10/J11 will move in to maintain air superiority while J16/JH7A serve as bomb trucks account for the majority of the strike sorties.
 

CottageLV

Banned Idiot
It is still nothing but a fan-art. Until the spyshots of the prototype comes out, this is just a made-up story.
 

escobar

Brigadier
In a future conflict J19 and J20 will be vanguard of a strike force, hunt down enemy high value aero assets and disable key air defense installations. Once the enemy is suppressed J10/J11 will move in to maintain air superiority while J16/JH7A serve as bomb trucks account for the majority of the strike sorties.

this strategy is perfect against every enemy china could go against in asia but i wonder how well it will work
against USAF/USN with their AirSea Battle Concept?
 

paintgun

Senior Member
if we look into PLAAF aircraft requirements/acquisition strategy in an OPFOR structure aircraft class matchup, we can see :

- J-20 against USAF F-22 (A2A superiority, uncompromised stealth/cost)
- J-10A/B against F-16 (ROKAF, JASDF), F-18 (USN) (legacy, CAP, multirole, force backbone, bread and butter)
- Flankers/J-11 against F-15 (ROKAF, JMSDF, USAF) and Russians (legacy, A2A, strike/multirole, long range, forward operations)
- fighter bombers (JH-7A, J-8, Q-5)
- trainers assortments

so what's the gap needed to be filled?

- KF-X
- F-35
- PAKFA

the best fit would be a multirole aircraft, LO/stealthy enough to hold it's own ground, with reasonable cost, somewhere between medium and heavy weight class (i.e not too light) to retain the edge of aircraft performance, produced in large numbers

or in short something that can handle its own against F-35

the clue i think will again be the engines :
make it cheap and simple, medium-heavy twin engined, 2xWS-10
complicated clean sheet design, lighter fighter (and must wait further) single engined WS-15
 

delft

Brigadier
In this discussion about what I would call JH-XX I miss a consideration of the role of ground launched missiles. No doubt the USAF want to attack everything using aircraft ( manned or unmanned ), but PLA will think of knocking down the door with ballistic missiles and cleaning up with the JH-XX, to be followed by less stealthy aircraft and cruise missiles. That suggests to me a lower bomb/missile load that if everything has to be done by a large JH-XY. This kind of planning is awfully complex and the military staffs and the aircraft and ordnance designers are spending hundreds and thousands of man-years working out a suitable compromise.
 

Equation

Lieutenant General
Hell, it may even be better for SAC to take the JF17 approach and try and find an export customer to co-finance the development of the plane and hope that the PLAAF takes an interest after they get a chance to see what this bird could do.

But alas, I may be asking way too much of SAC for them to be able to pull something like that off.

I thought Pakistan is co-working with China on the JF-17 or do you mean a similar project like it?

---------- Post added at 12:46 PM ---------- Previous post was at 12:43 PM ----------

It is still nothing but a fan-art. Until the spyshots of the prototype comes out, this is just a made-up story.

LOL..didn't the naysayers said about it before the J-20 came out? Then all of a sudden everyone's jaw just drop?
 

SinoSoldier

Colonel
This is the current consensus on the PLAAF fighters:

J-19: shenyang 5th generation fighter: LERX, no DSI, etc
J-2X: single engine variant of J-20
Naval 5th generation fighter: under bid by Shenyang and Chengdu, with their own designs
JH-7B: upgraded JH-7: DSI, internal weapons bays, upgraded avionics, etc

The J-2X will go in direct rivalry with the J-19 for the naval 5th generation fighter bid
 
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