Russia is testing stand-alone elements of its sixth-generation fighter on fifth generation PAK-FA fighter jets.

Concern Radio-Electronic Technologies (KRET) is currently working on electronic warfare systems for the sixth-generation warplane. "Standalone solutions that will be applied in the sixth-generation fighter are now being tested on the fifth-generation jet as well as on the ground-based equipment. Separate elements of the flight and navigation system have already been installed on PAK FA", Vladimir Mikheyev, advisor to the First Deputy Director General, KRET was quoted as saying by Tass in an interview Monday.

According to him, the sixth-generation fighters will be fitted with a unified electronic warfare system, which will serve as radar, an electronic warfare system, a data transmission system and as communications equipment. Additionally, it will function as a navigation system and as an IFF transponder.

"The PAK FA radar station should operate both as a locator and reconnaissance system, and the electronic warfare system for its part should engage in radio detection and location. That is, integration and redistribution of functions on the PAK FA is already happening," the KRET representative said.

According to him, the use of integrated avionics is tested on many aircraft. As an example, he cited the US fifth-generation fighter, the F-35.

Back in early March reports stated that work on the sixth-generation fighter aircraft had begun, with the fighter’s manned and unmanned versions under development. The fighter prototype is expected to perform its maiden flight prior to 2025.