J-XX Fighter Aircraft

Re: J-xx

I'm still not that sure if TVC makes canards redundant and therefore useless. TVC just pushes the tail down to achieve high AoAs wich results in high turn rates. These high AoAs should negatively affect your kinetic energy. While on the other hand canards make for a high turn rate through additional lift.

I find it a somewhat strange idea that they must build a bigger fighter because they can't achieve the same amount of stealth. And the F-22 is in the same class as an F-15 anyway. Then again, if one is to compensate the lack of stealth with additional avonic power, it may make sense.
So J-xx should be even bigger that the Raptor to get the bigger radar and EW suite packed for the lack of "power density"?
That'll mean Flanker size at least. But SAC should have gained experiance building aircraft that size.

So the J-10 may evolve a little further, but not to the point of beeing a light stealth fighter. I guess resources would be a little hard pressed to develop another one.

Re: J-xx

Canards and TVC both improve maneuverability, but they offer different things.

Look at the demonstration videos of the Su-47 and Su-37. The TVC allows the aircraft to turn very fast. But the canards, in combination with the tailplanes, can keep the aircraft moving in one direction, while facing another.

Thats how they can do impossible maneuvers like the somersault and the spiral.

Chinese satellites and stealth planes

Dear friends,

Recently we read news on Chinese launching satellites or lunar orbiter, etc. We haven't seen anything about radar.
Can you use satellites to track the opponent stealth planes? If yes, then, why do they still need ground-based radar or Electronic Spy Plane?
If the Chinese can see everything above the ground from their satellites, then they don't have to worry about inventing an anti-stealth radar, do they?

Please advise

Re: J-xx

SAR are typically low orbit, which means they don't hover over a position, but rather move around the earth. This means if you want constant coverage, you need a lot of them.
Even though stealth aircraft may be more reflective from above, satellites are much farther than a ground radar or airborne radar may be, making them not so good just because of the sheer distance involved.

Re: J-xx

Thanks RedMercury
Then my question becomes: What is Spy Satellite? If you cannot Not move, you have to move all the time (orbital movement), how can you SPY on something 24 hours?
Please advise

Re: J-xx

The sats achieve continuous coverage through numbers.

Re: J-xx

Not too sure about balance's real question.

I guess, if you are rich enough, therotically you can launch many big SAts with radars. Each one may need to have a nuke power station to drive the radar, and a reliable high speed data communication device with the ground air defense network. Of course, you also need several spaceship to send maintanence workers around.

In real life, most of the spy SATs only provide information up to 30 mins I think, whereas radar can track flying objects up to a 100th second.

Well, at least China has not reached the stage to deploy space borne air defense(detection) system. Currently China's aim is to build ICBM early warning SATs system. Against planes? Too good to be true.

Re: J-xx

actually, satellites DO move -- if it does not move, it will fall into earth. At GEO (geosynchronous orbit), a satellite move once per day around the earth, so it appears to be at same place at same time daily when observed from earth. At LEO (lower earth orbit), a satellite circles earth every 90 minutes.

A spy sat will be somewhere between LEO and GEO -- fast enough to cover most ground, but slow enough to take the pictures.

Re: J-xx

Several sats are in orbit not just one...when one moves from its field of coverage another one in orbit should be in its place...by this the images and videos of the sats are retransfered bouncing back the signal to the ground and combining it into one image or video...but anyway J-XX if it is just the same league as the Su-30 & F-15 than thats really nothing to brag about...though from the current operational aircrafts and expertise that China has...
my prediction is that it wont be as stealthy as the F-22 or F-35...but with performances execeeding F-35...seems that they are more interested in wanting the J-XX to be intellegience gathering, foward AWAC platform for C4ISR

Re: J-xx

Or the JXX could be taking the path of the J-8. First put out a production model, then radically modify the airframe like the J-8II.