J-20 5th Gen Fighter Thread VI

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Wakingbake

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How Does China’s Stealth ‘Weilong’ J-20 Warcraft Stack Up to the US F-22 Raptor?
© AP Photo / Kamran Jebreili
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00:52 05.08.2018Get short URL
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China’s new J-20, nicknamed ‘Weilong,’ is one of the world’s most advanced fighter jets. But how does it compare to the American F-22 Raptor? Let’s find out.

In July, the People's Liberation (PLA) Army Air Force, China's aerial warfare service branch, released a video of J-20 nighttime training exercises. The warplane was developed by Chengdu Aerospace and first entered service in 2017. The US F-22 Raptor, which first entered service in 2005, was developed by Lockheed Martin to be used by the US Air Force, the South China Morning Post (SCMP) reported.

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The two planes, both made of advance-alloy materials and weighing some 19,000 kg, are sized similarly. The J-20 is 20.3 meters long and has a 12.9 meter wingspan while the F-22 is 19 meters long and has a 13.6 meter wingspan. However, the J-20's loaded weight is heavier, at around 32,000 kg compared to the F-22's 29,000 kg. The US plane can take off with a maximum weight of 38,000 kg, slightly more more the J-20.

Both planes have a maximum speed faster than the speed of sound at 2,470 kilometers per hour. The F-22 has a shorter combat radius of 800 kilometers, while the J-20 has a combat radius of some 1,100 kilometers thanks to a large internal fuel tank, the SCMP reported.

The F-22 features afterburning turbofan G199-PW-100 engines that include vectoring nozzles which allow the US warplane to carry out maneuvers at speeds above the speed of sound. China did not develop advanced turbofan engines due to production delays, but the J-20 is expected to include a new WS-15 engine next year, will which greatly improve the plane's maneuverability and stealth capacity.

While the J-20's frontal and side stealth capacities are said to be superb, it is believed to be more susceptible to radar from the rear — in comparison to the F-22.

The fighters carry their weapons in internal bats. The J-20 can hold up to six air-to-air missiles and hold longer range missiles or an LS-6 precision-guided bomb. The F-22 can carry eight short or medium-range air-to-air or air-to-ground missiles in addition to an M61 Vulcan gun and four under-wing drop tank points.

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© AP PHOTO / XINHUA, ZHA CHUNMING
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Both fighters have highly-integrated avionics and sensor equipment that include low-observative, active electronically-scanned array (AESA) technology that can detect multiple targets under all weather conditions.

There is, however, a significant difference in cost, as each F-22 costs about $399 million, and each J-20 is reported to cost between $100-110 million.

Military pundits assert that while the two fighters are comparable in design and performance, the F-22 is slightly superior due to its advanced engine, although, with the addition of the new Chinese WS-15 turbofan, power parity may not be far off.
 

Deino

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@Deino, well, we're discussing the J-20, aren't we?

@Others, do we have any listing of Western academic papers for the J-20? There's definitely the Taiwanese study for the J-20's RCS, what we still need is a study for the J-20's drag level.

From what we know, the drag level of the J-20 at Mach 1.35 at 10,000 meters does not exceed 174 kN, since to reach Mach 1 from Mach 0.9 requires more power than to reach Mach 1.35.



NO

IMO surely no longer but to admit, I'm already long out and the discussion now already since #2820 - aka now exactly 149 posts on 15 pages !!!

Guys ??? are You nuts, crazy or is it the head outside???? I already reminded to stay or come back to topic two times and by now I have not the slightest bit of patience nor understanding anymore why you are discussing semantics, academics and most of all whatever, but nothing specifically related to the J-20.

So, option one: I delete all that stuff from page 282 on or move it to the Aerodynamics thread??

Anyway - all of YOU - take this as a warning! No more stuff on "my opinion and academic status is better than yours" ?


By the way ... this is the aircraft mentioned in the topic:

J-20A yellow - 20180731 - 1.jpg
 

Inst

Captain
There's an addendum on SpaceBattles where people are claiming that there was an error in the numbers given; it should have been 二十五 instead of 五十二. It's possible that this retraction is due to opsec, but if it's 25 km per minute, it maps to 1500 km/h or around Mach 1.4 supercruise at 10 km altitude. This roughly maps the "enough power to reach the speed of sound" claim.

Anyways, the drag conversation needs to be in the aerodynamic thread.
 

Blitzo

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There's an addendum on SpaceBattles where people are claiming that there was an error in the numbers given; it should have been 二十五 instead of 五十二. It's possible that this retraction is due to opsec, but if it's 25 km per minute, it maps to 1500 km/h or around Mach 1.4 supercruise at 10 km altitude. This roughly maps the "enough power to reach the speed of sound" claim.

Anyways, the drag conversation needs to be in the aerodynamic thread.

How about everyone just pretends that the 52km in one minute thing never existed so that we don't waste time and effort trying to make sense of a number that doesn't make sense... And end up with another dozen pages of J-20 related aerodynamics debate that settles nothing.
 

latenlazy

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How about everyone just pretends that the 52km in one minute thing never existed so that we don't waste time and effort trying to make sense of a number that doesn't make sense... And end up with another dozen pages of J-20 related aerodynamics debate that settles nothing.
Unless whoever published or made that graphic comes out to revise it themselves I think all this speculation is pretty pointless. We already know how sloppy Chinese content makers can be about this sort of thing. I don’t think we’ll be getting reliable answers about this graphic anytime soon.
 
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