Why Russia’s Su-57 Stealth Fighter Is Being Used as a Standoff Cruise-Missile Truck, Not a Homeland Defender

The Su-57 Felon has not pivoted to homeland air defense. Available evidence shows the opposite trajectory: Russia’s only fifth-generation fighter is being used almost exclusively as a standoff cruise-missile launch platform, while the country’s air defense crisis is managed separately through ground-based systems and a new policy allowing private businesses to buy their own counter-drone equipment.

External Pylons vs. Internal Carriage: The Stealth Trade-Off

The Su-57’s design includes two tandem ventral bays for primary strike weapons and smaller side bays — with bulged triangular fairings near the wing root — that can carry short-range R-74/R-74M2 air-to-air missiles . At the Dubai Airshow 2025, Russia publicly demonstrated the side-bay deployment sequence for the first time, showing how the fighter can combine stealthy internal strike weapons with a fast-reaction self-defense capability .

Yet the aircraft has been repeatedly observed carrying stores externally in combat, undermining its low-observability profile.

• SEAD loadout: In March 2026, a Su-57 was shown with two Kh-58UShK anti-radiation missiles internally and two R-74M2 short-range AAMs on external hardpoints — a mixed configuration that preserves stealth for the primary SEAD mission but sacrifices low-observability for self-defense weapons .
• Cruise-missile trucking: Starting in October 2024 and continuing through 2025–2026, Su-57s have been filmed and reported carrying Kh-59M2 and Kh-59 cruise missiles on external wing pylons, which completely negates the aircraft’s stealth advantage for those sorties . The Kh-59 series lacks radar-reduction features, while newer munitions like the Kh-69 are designed for internal carriage .

The trade-off is stark. Internal carriage preserves the 0.1 m² frontal RCS critical for penetrating contested airspace . External pylons boost weapons load and allow the Su-57 to employ larger legacy munitions, but they dramatically increase radar visibility. Russia appears willing to accept this penalty for two reasons: (a) the Su-57 is operating from standoff ranges where enemy air defenses are less dense, and (b) the internal bays are size-limited — Kh-59-class missiles do not fit in the ventral bays .

Standoff Strike, Not Homeland Air Defense

Contrary to any notion of a homeland-defense pivot, the dominant operational pattern in 2026 is standoff cruise-missile launch from sanctuary zones.

By May 2026, Ukrainian air-monitoring channels had recorded more than ten separate Su-57 cruise missile launch incidents across the Kursk border region, the Azov Sea, and occupied Crimea . The aircraft launches Kh-59 and Kh-69 missiles from protected positions far behind the front line and never crosses into Ukrainian-held airspace . Euromaidan Press reports that Russia keeps the Su-57 flying "mostly in standoff roles from Russian airspace and occupied territory" after early combat appearances over Ukraine failed to produce air-to-air kills .

There is no credible evidence in the available sources that the Su-57 has been tasked with intercepting Ukrainian drones or cruise missiles over Russian territory. That mission remains with ground-based S-400/S-300 systems, Pantsir-S1, and — increasingly — private-sector counter-drone systems.

Broader Air Defense Pressures in 2026

Russia’s ground-based air-defense network is under severe and growing strain, but the Su-57 is not being used to patch those gaps.

Ukraine has been striking Moscow with drones daily since January 2026, with Russia reporting 437 drones downed over Moscow in just the first four days of the year . By June 2026, CNN described a strategy of overwhelming Russian air defenses with drone swarms, while Ukraine simultaneously targets air-defense launchers and radar systems . In response, Russia began allowing private businesses to purchase their own air defense and counter-drone systems in May 2026, offloading costs to non-federal entities .

Ukrainian long-range drones struck Shagol airbase in the Chelyabinsk region (near the Urals) in April 2026, destroying at least two Su-57 fighters and a Su-34 — proving that even rear-area bases are no longer sanctuaries .

Su-57 Upgrades in 2026: A Widening Offensive Mission Portfolio

Russia is pressing ahead with production and upgrades, but the focus is on strike, drone control, and electronic warfare — not air defense.

• New technical configuration (February 2026): UAC delivered a batch of Su-57s with upgraded onboard systems, an improved aviation weapons suite, and expanded mission range, formally signaling doctrinal evolution beyond air superiority toward precision strike, EW, and deep penetration .
• Su-57D twin-seat variant (May 2026): First flight of a two-seat version designed as an airborne command platform to control S-70 Okhotnik combat drones and coordinate complex strike packages . The extra crew could also enable long-range air defense and strike missions .
• Distributed Aperture System (DAS): New Su-57s are being fitted with an F-35-style DAS for 360-degree situational awareness, potentially paired with the S-71 stealth drone .
• Su-57M program (Megapolis): Under development with improved mission systems, electromechanical actuators, and the new Izdeliye 30 engine (Type 30) for supercruise .

Key caveat: Production numbers remain very small — only about 30–40 operational airframes — and Russia continues to rely on a few front-line bases. The Shagol strike demonstrated that Ukraine’s deep-strike drones can reach even those limited operating locations .

Bottom Line

The Su-57 is not evolving toward homeland air defense. It is being adapted as a standoff cruise-missile carrier that trades stealth for payload when necessary, while the ground-based air defense network — under severe drone pressure — handles the homeland mission separately. Russia’s 2026 upgrades focus on strike reach, drone command (Su-57D), and sensor fusion — widening the aircraft’s offensive toolkit rather than reorienting it for defensive counter-air over Russia.