Sukhoi Su-57 fighters with second stage engines will soon be delivered to the Russian Air Force

Russia’s Rostec State Corporation is set to deliver Sukhoi Su-57 fighter aircraft featuring the advanced Izdeliye-30 (Product 30) or Second Stage engine.

Although not confirmed, it is anticipated that all future Su-57s will be outfitted with the Izdeliye-30 (AL-51F-1) engine, marking a crucial step towards fully realizing the stealth capabilities of the Su-57 in serial production.

The Izdeliye-30 engine boasts an afterburning thrust of 18,000 kgf and a maximum thrust of 11,000 kgf, resulting in a 1.2 times increase in the thrust-to-weight ratio. This enhances climb rates to 330-350 m/s and agility during maneuvers. It also elevates the service ceiling and supersonic cruising speed to 2150-2200 km/h, with a maximum speed of 2600-2700 km/h.

The AL-51F-1 (Izdeliye 30) is an advanced turbofan engine featuring a two-shaft, low-bypass, afterburning design. Noteworthy improvements over its predecessor, the AL-41F1, include glass-fiber plastic IGVs and convergent-divergent nozzles with serrated flaps to minimize radar visibility. The AL-51F-1 engine also boasts a 19% increase in thrust-to-weight ratio, a 6.4% enhancement in specific thrust, and a 9% reduction in specific fuel consumption.

In terms of power, this turbofan engine’s thrust reaches 107.9 kN (24,300 lbf) without afterburner and 166.8 kN (37,500 lbf) with afterburner engaged. Equipped with a full authority digital engine control (FADEC) system, the AL-51F-1 ensures reliability across various operational conditions.

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