SOURCE: RAUNAK KUNDE / NEWS BEAT / IDRW.ORG
Rosoboronexport, Russia’s state-owned arms exporter, has expressed concerns regarding India’s decision to exclude the AL-41F-1S engine from its Su-30MKI “Super-30” upgrade program planned for 80 odd aircraft. Speaking to idrw.org, Rosoboronexport officals argue that the AL-41F-1S engine offers significant advantages over the existing powerplants in the Indian Su-30MKI fleet. The AL-41F-1S, also known as article 117S, is a modern modular two-shaft turbofan engine featuring thrust vector control and integrated digital control.
A key selling point for the AL-41F-1S is its compatibility with existing Su-30MKI airframes. Sharing the same geometry and attachment points as the AL-31FP version currently used in the Su-30MKI, the AL-41F-1S could be integrated with minimal modifications to engine nacelles and equipment. This compatibility would streamline the upgrade process and potentially lower costs.
Rosoboronexport highlights the improved performance of the AL-41F-1S compared to its predecessors. The engine boasts an 18% increase in thrust generation (144kN compared to 122kN) due to a new low-pressure compressor with increased airflow and efficiency, along with a new turbine with an enhanced blade cooling system. This translates to improved power, acceleration, and overall manoeuvrability for the Su-30MKI.
Rosoboronexport further emphasizes the successful application of the AL-41F-1S in the Russian Su-30SM2 fighter program. The shared airframe between the Su-30MKI and Su-30SM2 suggests that the Indian Su-30MKI fleet could benefit significantly from adopting the same engine technology.
While Rosoboronexport presents a compelling case for the AL-41F-1S, India’s decision-makers have decided to stick with the Modernized AL-31FP version engine that will now include the installation of a FADEC-type digital control system, which provides improved acceleration capability and efficiency (an analogue hydro-mechanical system was used previously). The process to stick with the e AL-31FP version also likely involved a broader range of factors beyond just engine performance. Cost, potential technology transfer opportunities, and local supply chain in India all played a role in the selection process.
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