Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Indians talk big about foreign weapons they have.
China actually has its own defense industry.
China can build its own weapons.
india cannot keep up.
that is hurting the huge indian ego.
J20
As far as Chinese industry is concerned we know it manufactures foreign metals... We do the same... the only difference is we do it with an Agreement, and you do it without one...
These two planes look about the same to me.
Weak.
lol, Martian is a middle-aged man, and his archnemesis in this forum is Gambit.
Better stay away from him in a challenging debate.
Otherwise, you will get bullied again.
I.STEALTH
1. Canards
canards are forewings close to the nose of the aircraft that provide maneuverability. According to Mr. Aboulafia, “There’s no better way of guaranteeing a radar reflection and compromise of stealth” than adding canards to the aircraft.canards are generally indicative of a less-than-harmonious design requiring ‘bolt-on’ fixes. And as they add radar-reflecting edges, they’re usually not stealthy.
Now compare it all other 5th gwn fighters they dont have canards or may be the chinese are the 1 step ahead to US & russia in stealth designing
2.engine nozzles
The same goes for the engine nozzles, which were clearly not designed to be stealthy, as well the large overall size of the aircraft.But in a close air combat, thought it has a higher manoeuvrability, it is still vulnerable to heat seeking missiles as the aircraft lacks a stealth design in the nozzle section.
Though, the aft section stealth design doesn’t look satisfactory, the tail boom, fins and the engine with a conventional nozzle compromises further the overall stealth characteristics of the aircraft.
The F-22, B-2 stealth bomber and now-retired F-117 stealth fighter-bomber all have carefully shaped, angular nozzles meant to scatter radar waves. In the F-22, these nozzles can move, ‘vectoring’ the engine thrust to boost manoeuvrability. The apparent absence of stealthy nozzles and thrust-vectoring places a hard limit on the J-20’s ability to evade radar detection from behind.
The design has only two apparent weaknesses, which are the curvature in the slab side shaping, which provides broader reflection lobes than necessary, and the circular exhaust nozzle, a weakness common to the F-35 and T-50.
One type of two dimensional nozzle is a single expansion ramp nozzle referred to as a SERN nozzle. SERN was developed as a variable area non-axisymmetric nozzle with a unique installed performance characteristic of low weight and frictional drag because there is no or a smaller lower cowl. Low observable (LO) exhaust nozzle technology is being developed for current and future fighter/attack aircraft. LO nozzles should be integrated cleanly with the aircraft airframe and not degrade the aircraft's performance due to weight and drag penalties. Exhaust systems for combat aircraft should possess characteristics to enhance aircraft survivability, including high internal performance, reduced radar cross section (RCS), low infrared (IR) signatures, low installed weight, low installation drag and, in some cases, thrust-vectoring capabilities.
I understand that the ventral fins, if applied with RAM, aligned and shaped correctly will have a lower RCS than one having ventral fins that is not.
But clearly a J-20 with ventral wings will have a larger or at least equal RCS than J-20 without, from all aspects. Again, an aircraft with more exposed surfaces (like wings, for example) will have a larger RCS than an aircraft with fewer exposed surfaces.
As for IR... here's an excellent video of last years faranborough air show, taken by both a normal and IR camera. You can see that almost all aircraft have pretty large exhausts trailing behind them (including F-22, typhoon, A400m, and a variety of other commercial airliners). The F-22 minimizes its own a little likely due to its special nozzles, but even that can be quite detectable.
Of course I'm not sure how applicable that would be for a 5th gen SRAAM (AIM-9X, ASRAAM, IRIS-T, PL-10 etc) but I think we can safely say the ventral fins are there primarily for aerodynamics and the slight benefit for IR hiding is more incidental.
so it looks like that the design of t 50 is based on flankersAm I looking at two PAK FAs or two Su-27s?
I can't tell.
Neither of them looks very stealthy. Look at those completely conventional nozzles. So sad.
First...Composite materials does not guarantee absorbance. So the composite materials can be tossed.I've already discussed the stealthiness of the J-20 Mighty Dragon canards on this forum on July 6, 2011. My post (link to post #154 - http://www.defence.pk/forums/china-...neration-aircraft-updates-discussions-11.html):
"I said the J-20 canards were irrelevant for four reasons:
1. Composite material composition
2. RAM coating
3. Curved surface to deflect radar waves
4. Small incremental increase in surface area
You and PtldM3 are ridiculous. Your claim will always be: "Well, we can't know with absolute certainty until we put a J-20 in an anechoic chamber." We don't even know the results of a F-22 in an anechoic chamber. Under your ridiculous standard, you will always make whatever ludicrous claims that the two of you like."
what!! J20 superior to f22Secondly, I recently made a post comparing the J-20 canard winglets to the F-22 horizontal tailplanes. I said the J-20 Mighty Dragon is a superior design, because the placement of winglets in front of the main wings permit both supermaneuverability and stability.
From my August 25, 2011 post:
Tailless J-20 Mighty Dragon is superior to F-22 Raptor canardless design
J-20 Mighty Dragon has canard winglets, but no tailplanes.
F-22 Raptor has no canards, but it has tailplane winglets.
In conclusion, the J-20 Mighty Dragon is a superior evolutionary design of its chronological F-22 predecessor.:
ok lets see that in future ,whether they would develop it or not F-22 type 2D flat engine nozzles.Regarding the J-20 LOAN (i.e. Low Observable Asymmetric Nozzle) engine nozzles, I have already discussed its comparable stealthiness to the F-35 and inferiority to the F-22.
In my subsequent posts, I freely acknowledged the J-20 round engine nozzles are inferior to the F-22 flat nozzles. The technical reason is that the F-22 flat nozzles are a wide-band stealth design. The current J-20 and F-35 LOAN (Low-Observable Asymmetric Nozzle) technology is only narrow-band stealth (in two bands, X and Ku).
From my January 14, 2011 post:
J-20's Low Observable Axisymmetrical Nozzle (i.e. LOAN) technology
Those are refined Low Observable Axisymmetrical Nozzles and first tested on a F-16 for the JSF programme. The LOAN was developed after the F-22 and that's why the Raptor doesn't have them.
[
----------
There is a reasonable expectation that China will ultimately install F-22 type 2D flat nozzles on the J-20 Mighty Dragon. Chinese research into 2D flat engine nozzles has been ongoing since the 1990s.
Since the 1990s, China has been researching its own version of F-22 type 2D flat engine nozzles.
Am I looking at two PAK FAs or two Su-27s?
I can't tell.
Neither of them looks very stealthy. Look at those completely conventional nozzles. So sad.