(DEFENCE SECURITY ASIA) — Russia has delivered another batch of Su-35S multirole fighters to the Russian Aerospace Forces, marking the third confirmed handover of 2026 and underscoring Moscow’s continuing ability to replenish high-end combat aviation despite wartime attrition and Western sanctions.

The August 27 delivery follows Su-35S batches announced in April and May, establishing a sustained production rhythm that carries strategic significance because Russia simultaneously requires replacement aircraft for combat losses, operational expansion, export commitments and continuing modernization of its tactical aviation fleet.

Built at the Yuri Gagarin Aviation Plant in Komsomolsk-on-Amur, the newly delivered aircraft completed factory testing across multiple operating regimes before flying directly to their assigned airbase, demonstrating an established industrial-to-operational pipeline for reinforcing frontline Russian airpower.

The exact number remains undisclosed, creating an important intelligence gap, although imagery released around the handover reportedly shows at least two aircraft and corresponds with the two-to-four-aircraft batches that have characterized recent Su-35S production cycles.

That opacity means any assessment of Russia’s actual Su-35S inventory must distinguish confirmed handovers from estimated production, particularly because Moscow does not publish comprehensive annual figures covering combat losses, replacement rates, operational availability or the distribution of newly manufactured fighters.

A Russian Aerospace Forces Su-35S pilot described the aircraft as performing reliably across long-range interception, strike-group protection, UAV destruction, precision attacks and reconnaissance, illustrating how Moscow increasingly employs the Flanker derivative as a multi-mission platform rather than exclusively an air-superiority fighter.

Operationally, that versatility matters because every additional Su-35S potentially strengthens several mission sets simultaneously, including defensive counter-air, combat air patrols, strike escort, suppression of enemy air defences and long-range missile engagements against aircraft operating behind contested frontlines.

The strategic question therefore extends beyond how many aircraft arrived in August, because the more consequential indicator is whether Russia’s aerospace-industrial base can manufacture advanced tactical aircraft faster than battlefield losses, maintenance demands and export commitments remove them from domestic availability.

Available production estimates indicate that manufacturing has so far exceeded visually confirmed Su-35S attrition, enabling Moscow to preserve a sizeable high-end fighter force while simultaneously sustaining intensive operations and maintaining deliveries from an industrial base operating under extensive external restrictions.

This production resilience becomes more significant because the same Komsomolsk-on-Amur industrial ecosystem also supports the Su-57 programme, forcing Russia to balance immediate requirements for proven Su-35S capacity against longer-term efforts to expand its smaller fifth-generation fighter force.

Iran’s reported 48-aircraft Su-35 commitment adds another pressure point because export production potentially competes directly with Russian Aerospace Forces requirements, transforming manufacturing capacity at Komsomolsk-on-Amur into a strategic resource linking Russian force regeneration with Moscow’s expanding defence relationships abroad.

The latest delivery consequently represents more than another routine aircraft handover: it demonstrates how industrial throughput, replacement capacity, long-range weapons, operational survivability and export obligations are converging around the Su-35S as Russia attempts to sustain credible high-end tactical airpower.

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Wartime Su-35S Production Is Outpacing Confirmed Combat Attrition

Serial Su-35S production began in 2012 following an initial 2009 contract for 48 aircraft, followed by another 50-aircraft agreement in 2015 and a subsequent order for approximately 30 fighters around 2020, progressively expanding Russia’s planned fleet.

Additional wartime orders subsequently pushed domestic requirements beyond earlier programme expectations, while estimates place cumulative Russian production broadly between 150 and more than 180 aircraft, although discrepancies between available assessments prevent any definitive inventory calculation.

Production accelerated visibly during recent years, with four batches estimated at approximately 10–15 aircraft during 2024 before seven announced deliveries during 2025 potentially produced between 17 and 21 fighters, representing the programme’s strongest publicly observed annual tempo.

Three deliveries have now been announced during 2026, potentially representing at least six to nine aircraft depending upon batch composition, although undisclosed quantities make extrapolation inherently uncertain and prevent firm conclusions regarding Russia’s eventual year-end production total.

Since February 2022, approximately 16 Su-35S deliveries have been announced, suggesting potentially 32–48 newly manufactured aircraft if average batches contained two or three fighters, although that calculation remains an estimate rather than an officially confirmed production figure.

The strategic importance is the apparent relationship between production and attrition, because visually documented Russian Su-35S losses remain substantially below estimated wartime deliveries, meaning manufacturing has apparently generated enough replacement capacity to offset confirmed aircraft destroyed during combat operations.

At least eight Su-35S losses had been visually documented by early 2026, while another aircraft was reported lost near the Luhansk front during July, although competing explanations involving Ukrainian interception capabilities illustrate continuing uncertainty surrounding individual combat-loss circumstances.

Ukrainian official claims have been considerably higher, while broader assessments covering both Su-35S and Su-30SM2 losses or serious damage produce different totals, reinforcing why confirmed imagery, official claims and analytical estimates must remain separate when evaluating Russian force regeneration.

Even with those uncertainties, continued deliveries indicate that combat attrition has not yet broken the Su-35S production-replacement cycle, allowing Russia to retain a substantial fleet while distributing operational burden across newly manufactured aircraft and surviving pre-war airframes.

For NATO planners, the relevant strategic indicator is therefore not individual losses but Russia’s replacement ratio, because sustained manufacturing reduces the cumulative effectiveness of attrition unless destruction rates consistently exceed the industrial system’s capacity to regenerate combat-ready aircraft.

Irbis-E and R-37M Give Russia a Long-Range Air-Combat Architecture

The Su-35S remains Russia’s principal high-end 4++ generation air-superiority fighter, combining the aerodynamic foundation of the Su-27 Flanker with substantially improved propulsion, sensors, electronic warfare capabilities, fuel capacity and weapons integration designed primarily around long-range air combat.

Its N035 Irbis-E X-band passive electronically scanned array radar uses a mechanically steerable antenna combined with electronic scanning, providing an unusually broad field of regard and manufacturer-claimed detection distances approaching 350–400 kilometres under favourable narrow-sector conditions.

Those headline figures require caution because detection range changes substantially with radar cross-section, geometry, electronic countermeasures and search parameters, while practical performance against manoeuvring fighters would generally be lower than maximum figures obtained against favourable target presentations.

The radar can reportedly track as many as 30 airborne targets and engage eight simultaneously, giving the Su-35S considerable multi-target management capacity when operating within an integrated battlespace supported by ground radars, airborne surveillance and tactical data links.

Its OLS-35 infrared search-and-track system adds a passive detection channel incorporating infrared, television and laser-ranging functions, potentially allowing pilots to search for targets without continuously transmitting radar energy that could expose their position through hostile electronic-support measures.

The aircraft’s most consequential air-to-air weapon is the R-37M, a very-long-range missile reportedly capable of approximately Mach 6 and advertised engagement distances reaching 300–400 kilometres against suitable high-altitude targets, particularly large surveillance, tanker or support aircraft.

Combined with Irbis-E, the R-37M allows Su-35S formations to create long-range engagement zones without approaching the densest enemy air-defence envelopes, forcing opposing pilots to account for missile threats well before traditional medium-range fighter engagements would normally begin.

Medium-range R-77-1 missiles and short-range R-73 or R-74 weapons provide additional engagement layers, enabling the fighter to transition from long-distance interception into progressively shorter combat geometries while maintaining substantial aerodynamic performance and high-off-boresight engagement capability.

This layered missile architecture explains why the Su-35S remains tactically relevant despite lacking stealth, because Russia can exploit range, altitude, speed and external targeting information to launch weapons while minimizing exposure to surface-to-air missiles and opposing fighters.

Against peer opponents equipped with modern AESA radars, advanced radar-warning receivers, electronic warfare systems and networked targeting, however, advertised detection and engagement ranges would probably contract, making battlespace integration increasingly decisive compared with isolated platform specifications.

Ukraine Has Turned the Su-35S Into a Standoff Air-Superiority Workhorse

Combat operations over Ukraine have demonstrated how Russia employs the Su-35S primarily from comparatively protected airspace, using altitude, powerful sensors and long-range missiles to pressure Ukrainian aviation without routinely exposing expensive fighters to the densest surface-to-air missile environments.

High-altitude combat air patrols allow Su-35S crews to exploit radar horizon and missile kinematics while providing protective coverage for other Russian aircraft, particularly Su-34 strike fighters conducting stand-off attacks and glide-bomb operations against Ukrainian positions.

This division of labour gives the Su-35S strategic importance beyond direct kills because its presence can constrain hostile aircraft movement, protect strike packages and complicate interception planning, effectively influencing airspace even when no missile is ultimately launched.

The aircraft has additionally undertaken UAV interception, reconnaissance and precision attack missions, reflecting Russia’s effort to extract maximum operational utility from a heavy fighter possessing substantial fuel, payload and sensor capacity across air-to-air and air-to-surface roles.

Its 12 external hardpoints can accommodate approximately 8,000 kilograms of stores, including Kh-31 anti-radiation weapons, Kh-29, Kh-38 and Kh-59-family missiles, guided bombs and anti-ship weapons alongside its principal air-to-air missile inventory.

Such payload flexibility permits mission commanders to configure Su-35S formations for mixed threat environments, potentially combining long-range air-to-air missiles with suppression-of-enemy-air-defence weapons rather than dedicating every aircraft exclusively to a single combat function.

The fighter’s combat radius exceeding approximately 1,500 kilometres also reduces dependence upon forward basing for many missions, expanding operational flexibility while complicating adversary attempts to suppress Russian tactical aviation solely by attacking airfields nearest the battlespace.

Nevertheless, the Su-35S remains a large, non-stealthy aircraft whose radar and infrared signatures create significant vulnerabilities whenever operations bring it within effective engagement geometry of advanced surface-to-air missile systems such as Patriot.

Confirmed combat losses demonstrate that superior kinematics cannot eliminate those vulnerabilities, particularly within a battlespace increasingly dominated by distributed sensors, long-range surface-to-air missiles, electronic surveillance and networked targeting capable of generating engagements beyond traditional visual awareness.

Russia’s operational response has therefore emphasized stand-off employment rather than unrestricted penetration, revealing a central lesson from Ukraine: survivability increasingly depends upon weapon reach, sensor networking and tactical geometry rather than spectacular manoeuvrability alone.

Supermaneuverability Remains Powerful, but Stealth and AESA Gaps Matter

Two Saturn AL-41F1S afterburning turbofans provide the Su-35S with approximately 142 kilonewtons of thrust each under afterburner, while independently steerable thrust-vectoring nozzles enable extreme manoeuvrability and rapid nose-pointing across demanding aerodynamic conditions.

The combination produces a thrust-to-weight ratio exceeding 1.0 under appropriate combat conditions and permits limited supercruise, while post-stall manoeuvres demonstrate exceptional aerodynamic control that can remain useful during close combat or rapid energy-state transitions.

Yet modern air warfare increasingly prioritizes beyond-visual-range detection, electronic warfare, low observability and cooperative targeting, meaning manoeuvres such as Pugachev’s Cobra carry considerably less strategic relevance than sensor performance and first-shot opportunities in networked engagements.

The Su-35S consequently represents a different technological philosophy from stealth fighters, emphasizing kinematic performance, large fuel capacity, powerful radar output and substantial weapons carriage rather than minimizing radar signature to penetrate sophisticated integrated air-defence systems.

Its Irbis-E radar remains formidable but employs PESA technology, creating disadvantages relative to modern AESA systems in areas including electronic-agility, resistance to sophisticated jamming and multifunction flexibility, particularly during engagements against technologically comparable adversaries.

Reports have suggested potential AESA developments derived from Su-57 technology, but the operational Su-35S fleet continues using Irbis-E, leaving modernization of its principal radar architecture an important variable affecting the fighter’s longer-term competitiveness.

Electronic warfare equipment, tactical data links and passive infrared sensing partly mitigate those limitations because modern engagements depend upon distributed information rather than one aircraft independently detecting, classifying, tracking and engaging every target through its onboard radar.

The aircraft’s approximately Mach 2.25 maximum speed, 18,000-metre service ceiling and considerable internal fuel capacity provide commanders with substantial kinetic and geographic flexibility, particularly for long-range interception across Russia’s immense airspace and extended operational theatres.

Those characteristics also make the Su-35S suitable for escorting strike formations and repositioning rapidly between sectors, strengthening force posture by allowing fewer aircraft to influence larger geographic areas when supported by adequate basing, maintenance and aerial refuelling infrastructure.

Its strategic value therefore lies not in any single specification but in combining range, weapons, sensors and mature Flanker logistics into an established operational system capable of generating combat sorties while Russia’s more advanced Su-57 fleet expands gradually.

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Iran and Su-57 Production Are Creating a Strategic Capacity Contest

Russia’s ability to maintain domestic Su-35S deliveries will increasingly depend upon industrial allocation because the Komsomolsk-on-Amur production complex must support Russian requirements while accommodating Su-57 manufacturing and substantial foreign commitments competing for skilled labour, components and assembly capacity.

Iran represents the most consequential reported export requirement, with a 48-aircraft Su-35 order potentially absorbing considerable production capacity and reports indicating that approximately 20 Iranian aircraft had already been completed by July 2026.

With remaining Iranian deliveries reportedly extending through 2028, export obligations could slow the rate at which new Su-35S aircraft reach Russian Aerospace Forces units during 2026–2027, although precise production allocation remains impossible to determine from disclosed information.

China previously acquired 24 Su-35 fighters, while additional reported customers including Algeria and Ethiopia have broadened the aircraft’s export footprint, potentially pushing combined international commitments toward approximately 96 aircraft according to available estimates.

These exports carry geopolitical consequences because Su-35 transfers can alter regional airpower calculations while simultaneously extending Russian aerospace relationships, maintenance networks, training dependencies and weapons integration beyond the immediate commercial value of individual aircraft sales.

For Iran specifically, acquiring a heavy long-range fighter would represent a substantial qualitative change from its ageing combat aviation inventory, although aircraft numbers, delivery schedules, operational readiness and weapons packages remain critical variables in assessing the eventual military effect.

Western sanctions targeting electronics and precision components were intended partly to constrain Russia’s defence-industrial capacity, yet continued Su-35S production indicates that domestic substitution, accumulated inventories and alternative procurement mechanisms have prevented a complete disruption of the manufacturing pipeline.

That resilience should not automatically be interpreted as absence of industrial pressure, because continued production alone does not reveal component quality, manufacturing efficiency, maintenance burden, aircraft availability or whether competing programmes are experiencing delays elsewhere.

The decisive indicator through 2027 will therefore be whether Russia can simultaneously sustain Su-35S deliveries, expand Su-57 output, fulfil Iranian commitments and replace combat attrition without forcing significant compromises across production schedules or operational readiness.

For the global battlespace, the August delivery ultimately demonstrates that Russia’s Su-35S challenge is becoming an industrial and force-generation equation: how effectively Moscow can convert manufacturing capacity, long-range weapons and established logistics into sustainable combat power despite continuing wartime pressures.