Does Russia Have Stealth Planes? Assessing The Su-57 Felon Fleet In 2026

As of July 28, 2026, the question of whether Russia possesses stealth aircraft remains a focal point for defense analysts monitoring the ongoing conflict in Eastern Europe and global aerospace developments. Russia’s primary operational stealth platform is the Sukhoi Su-57 (NATO reporting name: Felon), a twin-engine, fifth-generation multirole fighter designed to incorporate low-observability technology, advanced avionics, and supercruise capability. While the Russian Aerospace Forces continue to integrate these units into their operational rotation, questions regarding their mass-production scale and true "stealth" effectiveness compared to Western counterparts persist.

Context and Background: The Evolution of the Felon

The Su-57 was designed to compete directly with the American F-22 Raptor and F-35 Lightning II. Unlike the American platforms, which prioritize all-aspect stealth through highly refined airframe shaping and radar-absorbent materials (RAM), the Su-57 design focuses on a balance of agility and low observability.

By 2026, the United Aircraft Corporation (UAC) has prioritized the transition to the "Izdeliye 30" engine, intended to provide the aircraft with genuine supercruise performance and improved fuel efficiency. Early production models utilized interim engines, which limited the overall performance envelope. While Western intelligence assessments suggest that the radar cross-section (RCS) of the Su-57 is significantly higher than that of the F-35, it remains the only aircraft in the current Russian arsenal that qualifies as a fifth-generation stealth platform.

The industrial challenges remain substantial. Despite efforts to ramp up production throughout 2025 and 2026, the supply chain for advanced microelectronics—impacted by international sanctions—continues to create friction in the rapid fielding of these aircraft. The current fleet size, while growing, is estimated to be in the low dozens rather than the hundreds, forcing the Russian military to employ these jets judiciously.

Impact and Utility in Modern Combat

The strategic utility of the Su-57 in the current geopolitical climate is twofold: tactical capability and regional deterrence. In contested environments, the aircraft is utilized for long-range stand-off strikes and electronic intelligence gathering. Its integration of an active electronically scanned array (AESA) radar allows it to track multiple targets while maintaining a degree of stealth that conventional fourth-generation fighters, such as the Su-35, cannot achieve.

However, the "stealth" label is subject to intense technical debate. Military observers note that the Su-57 features non-stealthy elements, such as external sensor housings and visible rivets, which contribute to a higher radar signature. In the context of modern Integrated Air Defense Systems (IADS), the Su-57’s stealth is likely optimized for specific frontal-sector reduction rather than the true all-aspect invisibility seen in Western designs. As of mid-2026, the primary use of the Su-57 has been to support operations where high-tier, low-observable capabilities provide a localized advantage without risking the entire fleet in high-threat environments.

What's Next: The Future of Russian Low-Observability

As the world heads into the second half of 2026, the defense sector is watching for two major developments. First is the stability of the Izdeliye 30 engine production cycle. A successful, full-scale rollout of this engine would mark a critical milestone, theoretically allowing the Su-57 to meet its original design requirements for speed and stealth.

Second, Russia continues to experiment with the S-70 Okhotnik-B, a heavy stealth unmanned combat aerial vehicle (UCAV) designed to operate in tandem with the Su-57. The "loyal wingman" concept is a cornerstone of Russian aviation strategy for the late 2020s. By pairing the Su-57 with stealthy autonomous drones, the military aims to extend its reach while keeping human pilots out of the most dangerous, high-density radar envelopes. Whether these programs can scale beyond prototype status in the current fiscal environment remains the single biggest variable for Russian air power through the end of the year.