Russia’s Su-35 is a loud aircraft in the only way that matters in modern air combat: it is easy to see on radar. In the case of a jet which sells itself as the razor edge of an established design pattern, that one quality influences all others, what the jet must do, what it is safe to do, why its capabilities are often more impressive on paper than in the sky under the surveillance of the present-day sensors and surface-to-air missiles.
The Su-35 is an extreme development of the Su-27 line, with the goal of extending an otherwise-venerable airplane into the territory of the so-called “4.5-generation” marketing even as Russia is still lagging in its actual fifth-generation development program. It retains the Flanker formula: a critical fighter with long legs, a heavy weapons load, and flight performance oriented to the domination in the medium and low speeds. With thrust-vectoring engines, it can produce extreme nose authority and high-energy maneuvering that continues to make heads turn to this day on demonstrations.
It is not that agility is the issue. The issue is that survivability is no more something that can be regained by a pilot by making a tighter turn. The size and shape of the Su-35 give it a large radar cross-section, and its design priorities, including the importance of kinematics, range, payload and a powerful mechanically scanned radar do not alter this fact. The Su-35 is best on a day when it can see first, remain connected, and attack the target outside the threat envelope because of the performance of passive sensors, cooperative targeting networks, and modern fighter radars against its opponents. Those are precisely the domains where Russian tactical aviation is assessed to lag behind the Western one and the most advanced in Asia, in particular, in sensor fusion and robust networking.
Critiques of reference have obsessed itself with Irbis-E radar Su-35 and the disparity between the headline detect numbers and the range and situations that are significant in combat use. A technical account widely spread says that the advertised long-range values are conditional on restricted searches and that those ranges in normal scans are restricted, as well as constraints on tracking capability “in normal volume search that range shrinks down to 200 km” in normal volume search- on a given benchmark target. Assuming that all figures may, or may not be cross-configurationally applicable, the overall theme is the same; the jet is designed to launch missiles far, and the contemporary battle rewards any platform which can quietly generate a clear track picture, as it is actively contested on both flanks with jamming, decoys and offboard cueing.
The tradeoffs are more difficult to overlook since the program has a strategic context. Russia previously indicated an intention to deploy 76 Su-57s by 20272028, but estimated quantities in the literature indicate that it has approximately 32 including prototypes on the fleet, with deliveries in 2025 being described as insignificant. The same industrial and supply-chain stresses decelerating the Su-57, in particular sanctions against high-end electronics and materials, also impose constraints on the quantity of advanced Flankers which can be manufactured, upgraded, and maintained. Even favorable reports of the Su-35 production numbers do not leave a lot of leeway when attrition, training lines, and other delivery obligations are all competing off the same limited base.
When combined, the Su-35 is less of an answer to an airpower fifth generation development, rather than a very capable missile carrier, which requires choreography. It has the ability to threaten non-stealth aircraft, patrol, and use ground-based radar cueing. However, with no low observability, and with state-of-the-art fusion and networking, it must be pushed into the standoff strategy and into risk-managed routing as an operational posture that underscores precisely what the aircraft is, and what the fighter transition in Russia has not yet turned into.
