Russia’s UAC Completes Maiden Flight of Su-57D Two-Seat Fighter

This article is based on an official press release from United Aircraft Corporation (UAC), supplemented by industry research and analysis.

On May 19, 2026, Russia’s United Aircraft Corporation (UAC), a subsidiary of the Rostec State Corporation, successfully completed the maiden flight of the Su-57D. According to an official company press release, this new military aircraft is a two-seat, multirole fifth-generation fighter designed to expand the operational scope of the baseline Su-57 platform.

The prototype was piloted by Sergei Bogdan, Sukhoi Design Bureau Chief Test Pilot and Hero of Russia. Industry data confirms the flight took place at the Gromov Flight Research Institute airfield in Zhukovsky, near Moscow, lasting approximately 40 minutes.

UAC and Rostec officials highlighted that the flight proceeded in accordance with mission requirements, evaluating the stability and handling characteristics of the modified airframe. The introduction of the twin-seat variant marks a significant milestone, introducing a platform intended for combat, advanced training, and airborne command and control.

Technical Specifications and Airframe Origins

According to defense analysts and open-source intelligence cited in our research, the prototype, carrying the side number “055 Blue”, was not a clean-sheet build. Instead, it was converted from an existing single-seat airframe, specifically the T-50-5R. Industry records indicate this original airframe first flew in 2013, suffered an engine fire in 2014, and was subsequently rebuilt.

During the maiden flight, Pilot Sergey Bogdan reported that the aircraft’s performance, stability, and controllability were broadly consistent with the single-seat variant, and all onboard systems operated normally.

Cockpit Configuration and Design

The Su-57D features an elongated cockpit canopy to accommodate a tandem two-seat configuration. Similar to the design philosophy seen in the Su-30 Flanker family, the rear seat is positioned significantly higher than the front seat, providing the second crew member with adequate forward visibility. UAC officially registered the patent for this two-seat design in November 2023, outlining its technical specifications and intended role as an aerial command center.

Strategic Roles: Manned-Unmanned Teaming and Training

The official press release outlines three primary operational roles for the Su-57D: command and control, combat training, and multirole combat. A key function of the second crew member will be to manage mixed groups of manned and unmanned aircraft.

“The two-seat version of the Su-57… can be used not only for pilot training but also for organizing and managing combat operations of a joint group of manned and unmanned aircraft, creating a unified information and control space,” stated Rostec in the official release.

The “Loyal Wingman” Concept

Defense analysts note that this command-and-control capability aligns closely with Russia’s ongoing development of the S-70 Okhotnik (“Hunter”) heavy stealth drone. The Su-57D is expected to act as an airborne command center, directing the S-70 as a “loyal wingman” in highly contested airspace.

“This aircraft, developed proactively by our aircraft manufacturers, will not only boast unique combat capabilities but also the capabilities of a combat trainer and combat control aircraft,” noted First Deputy Prime Minister of Russia Denis Manturov in the UAC release.

Like the baseline Su-57, the Su-57D retains its low-observability characteristics and is capable of engaging air, ground, and naval targets around the clock, even in adverse weather and heavy electronic jamming environments.

Export Potential and Global Context

Beyond its tactical applications for the Russian Air-Forces, the Su-57D is heavily geared toward the export market. Historically, Russian twin-seat fighters have been highly sought after by foreign clients, and UAC leadership explicitly linked the new configuration to international sales.

“We continue to work on improving and expanding the functionality of our most advanced fifth-generation aviation system. I am confident that the two-seat version of the aircraft will significantly contribute to its success in international markets,” said Vadim Badekha, CEO of UAC.

Prospective International Clients

Industry reports indicate that India and Algeria are primary prospective buyers. Talks between Russia and India regarding the license production of the Su-57 are reportedly at an advanced technical stage. Sukhoi had previously drafted a two-seat version specifically for an Indian requirement under the now-suspended joint Fifth Generation Fighter Aircraft (FGFA) program.

Globally, the introduction of the Su-57D places Russia alongside China, which has developed the J-20S, a two-seat version of its own fifth-generation stealth fighter. In contrast, the United States currently does not operate a two-seat fifth-generation fighter, as neither the F-22 nor the F-35 features a twin-seat variant.

AirPro News analysis

We observe that converting an existing prototype (Tail 055) rather than manufacturing a new airframe from scratch is a pragmatic, cost-effective practice in military aviation testing. This approach allows UAC to accelerate the aerodynamic and systems testing of the tandem cockpit without the lead time required for a new build. Furthermore, the explicit focus on manned-unmanned teaming underscores a global shift in aerial warfare doctrine, where fifth-generation fighters are increasingly viewed as central nodes in a broader network of autonomous combat vehicles.

Frequently Asked Questions

• When did the Su-57D make its first flight? The maiden flight took place on May 19, 2026, lasting approximately 40 minutes.
• What is the primary purpose of the second seat? The second seat is designed for a crew member to manage manned-unmanned teaming (such as controlling the S-70 Okhotnik drone), as well as for advanced pilot training.
• Is the Su-57D an entirely new aircraft? No. According to industry analysis, the prototype was converted from an existing single-seat T-50-5R airframe.

Sources

• United Aircraft Corporation (UAC) Press Release