Available information says the Russians have built at least 6 prototype T-50 PAK FAs for their Air Force and Navy; the Chinese conducted a maiden test flight of its J-31 in 2012. 

An F-35 Joint Strike Fighter would be able to use its sensors, weapons and computer technology to destroy Russian and Chinese 5th-Generation Stealth fighters in a high-end combat fight, service officials said.

“There is nothing that I have seen from maneuvering an F-35 in a tactical environment that leads me to assume that there is any other airplane I would rather be in. I feel completely comfortable and confident in taking that airplane into any combat environment,” Lt. Col. Matt Hayden, 56th Fighter Wing, Chief of Safety, Luke AFB, Arizona, told Scout Warrior in a special pilot interview.

Furthermore, several F-35 pilots have been clear in their resolve that the multi-role fighter is able to outperform any other platform in existence.

(This first appeared in Scout Warrior here back in 2016.)  

While Hayden was clear to point out he has not, as of yet, flown simulated combat missions against the emerging Russian Sukhoi T-50 PAK FA 5th-Generation stealth fighter now in development or the Chinese Shenyang J-31 5th Generation Stealth aircraft. While he was clear to point out he did not personally know all of the technologies and capabilities of these Russian and Chinese aircraft, he was unambiguous in his assertion regarding confidence in the F-35. In addition, many Air Force officials have cited a strong belief that the F-35 is the best fighter in the world.

Available information says the Russians have built at least 6 prototype T-50 PAK FAs for their Air Force and Navy; the Chinese conducted a maiden test flight of its J-31 in 2012. In addition, China is in pre-production with its J-20 5th-Generation stealth fighter. This fighter, called the Chengdu J-20, made its first flight in 2011, and is expected to be operational by 2018, according to publicly available information and various news reports.

While Hayden did not elaborate on aspects of the J-20, he did say he would be confident flying the F-35 against any aircraft in the world.

“All those other countries (Russia and China) are trying to develop airplanes that are technologically capable as well -- from an F-35 perspective. We are no less capable than any airplane and any fighters out there,” Hayden described.

In addition to leveraging the best available technologies on a fighter jet, winning a dog-fight or combat engagement would depend just as much on the air-tactics and decisions made by a pilot, Hayden explained.

“I have not flown against some of those aircraft. When you fight against an airplane, it depends upon the airspeed. If I maximize the effectiveness of an F-35, I can exploit the weaknesses of any other aircraft,” he said.

Many analysts have made the assessment that the J-20 does appear to be closely modelled after the F-35.

In fact, a Defense Science Board report, cited in a 2014 Congressional assessment of the Chinese military, (US-China Economic Security and Review Commission) makes reference to specific developmental information and specs of numerous U.S. weapons systems believed to be stolen by Chinese computer hackers; design specs and technologies for the F-35 were among those compromised by Chinese cyber-theft, according to the report.

Chinese 5th-Generation:

An AIN Online report from the Singapore Air Show in February of this year catalogues a number of J-20 features and technologies – including those believed to be quite similar to the F-35.​

From the Report:  Original AIN Online Report HERE

“The J-20 is a large multi-role fighter with stealthy features similar to those found in the American F-22 and F-35. Although very little is known about its intended purpose, the aircraft appears to offer capability in a number of roles, including long-range interception and precision attack.

In terms of weapon carriage the J-20 has a similar arrangement to that of the Lockheed Martin F-22, comprising two lateral bays for small air-to-air missiles such as the agile, imaging-infrared PL-10, and a large under-fuselage bay for accommodating larger missiles and precision-guided surface attack weapons. The 607 Institute’s new PL-15 active-radar missile is thought to be the primary long-range air-to-air weapon, reportedly having been test-fired from a Shenyang J-16 platform last year. The PL-21, a ramjet-powered weapon in the same class as the MBDA Meteor, is another possibility for the J-20.

The sensor suite includes an electro-optical targeting system (EOTS) and a large-array AESA radar, which was developed by the 14th Institute at Nanjing Research Institute of Electronics Technology (NRIET, 14th Institute), and is possibly designated Type 1475/KLJ-5. Diamond-shaped windows around the fuselage suggest that a distributed aperture infrared vision system is installed.

In the cockpit, the J-20 sports three large color displays, plus other small screens, and a holographic wide-angle head-up display. An advanced datalink has been developed, and a retractable refueling probe is located on the starboard side of the forward fuselage. Much of the avionics suite has been tested by the CFTE (China flight test establishment) aboard a modified Tupolev Tu-204C, in much the same way as the systems of the F-22 were tested in a Boeing 757.”

Russian 5th-Generation:  

Regarding the Russian T-50 PAK FA Stealth fighter, numerous reports suggest the aircraft has numerous technological problems and is a 5th generation plane “in name only.”

The Following is a report on the T-50 PAK FA from Business Insider, also from this year’s Singapore Air Show….Business Insider Report HERE:

“Reporting from the Singapore Airshow 2016, IHS Jane's reports that "Russian industry has consistently referred to the Sukhoi T-50 PAK FA as a fifth-generation aircraft, but a careful look at the program reveals that this is an 'in name only' designation."

This is largely because of a lack of evolutionary technology aboard the plane compared with previous jets that Russia and the US have designed. Indeed, the PAK FA's engines are the same as those aboard Russia's 4++ generation (a bridging generation between fourth- and fifth-generation aircraft) Su-35. Additionally, the PAK FA and the Su-35 share many of the same onboard systems.

And even when the PAK FA's systems are different from the Su-35's, the plane's specifications are still not up to true fifth-generation standards.

RealClearDefense, citing Indian media reports that are familiar with a PAK FA variant being constructed in India, notes that the plane has multiple technological problems. Among these problems are the plane's "engine performance, the reliability of its AESA radar, and poor stealth engineering."

F-35 Sensor Fusion:

Despite various reports about technologies being engineered into the Russian and Chinese 5th-Generation Stealth Fighters, it is in no way clear that either aircraft is in any way comparable to the F-35. Most publicly available information seems to indicate that the F-35 is superior - however, to some extent, the issue remains an open question. More information is likely to emerge once the Russian and Chinese aircraft are operational and deployed.

For example, the Chinese J-20 is cited as having an Electro-Optical targeting system, stealth configuration, datalink, AESA radar and precision weaponry quite similar to the F-35, according to the AIN report.

The computer algorithms woven into the F-35 architecture are designed to leverage early iterations of what could be described as early phases of “artificial intelligence.” Broadly speaking, artificial intelligence refers to fast-evolving computer technology and processors able to gather, assess and integrate information more autonomously in order to help humans make decisions more quickly and efficiently from a position of command-and-control.

“If there is some kind of threat that I need to respond to with the airplane, I don’t have to go look at multiple sensors and multiple displays from multiple locations which could take my time and attention away from something else,” Hayden added.

The F-35 software, which shows images on display screens in the cockpit as well as on a pilot's helmet-mounted-display, is able to merge results from various radar capabilities onto a single screen for the pilot.

“The F-35 takes from multiple sensors around the airplane and combines them together in a way that is much more manageable and accessible -- while not detracting from the other tasks that the pilot is trying to accomplish,” Hayden said.

For instance, the F-35's Electro-Optical Target System, or EOTS, is an infrared sensor able to assist pilots with air and ground targeting at increased standoff ranges while also performing laser designation, laser range-finding and other tasks.

In addition, the plane's Distributed Aperture System, or DAS, is a series of six electro-optical sensors also able to give information to the pilot. The DAS includes precision tracking, fire control capabilities and the ability to warn the pilot of an approaching threat or missile.

The F-35 is also engineered with an Active Electronically Scanned Array Radar, which is able to track a host of electromagnetic signals, including returns from Synthetic Aperture Radar, or SAR. This paints a picture of the contours of the ground or surrounding terrain and, along with Ground Moving Target Indicator, or GMTI, locates something on the move on the ground and airborne objects or threats.