India's long-gestating indigenous Kaveri engine programme has reached a significant milestone, with the dry engine variant successfully completing uninstalled-condition trials and now moving towards installed demonstrations on the Advanced Medium Combat Aircraft (AMCA) and the Ghatak unmanned combat air vehicle (UCAV).
The First Engine To Test (FETT), fitted with a dry engine configuration rather than the originally planned full-afterburner setup, was integrated in July 2025. Since then, testing agencies including the Aeronautical Development Agency (ADA) and the Gas Turbine Research Establishment (GTRE) have carried out extensive ground runs and performance evaluations.
What makes this dry-engine route strategically important is that it allows the programme to bypass some of the complex afterburner development challenges that plagued the earlier full Kaveri project — one of India's most ambitious aerospace efforts, initially conceived in the late 1980s. By focusing on the dry configuration first, engineers can validate core engine performance, thrust characteristics, and control system integration before tackling the afterburner module.
According to sources familiar with the development, the engine has undergone rigorous endurance and mission-cycle validation tests, some conducted domestically and others in Russia, where GTRE has maintained a testing collaboration facility. These tests are critical for certifying that the engine can handle the repeated start-stop cycles, high-G manoeuvres, and sustained operation profiles required by next-generation combat platforms.
With the uninstalled-condition trials — where the engine is tested as a standalone unit on a test bed — now complete, the focus has shifted to the more demanding installed-condition phase. Here, the engine must be demonstrated within the actual airframe, accounting for inlet airflow distortion, thermal management, and structural vibrations. The FETT unit is reportedly being modified or rebuilt to accommodate these installed trials.
The Ghatak UCAV, developed by ADA under the AMCA programme, is expected to be among the first platforms to operate the Kaveri dry engine. The drone is designed as a stealthy, carrier-capable, autonomous strike platform capable of conducting deep-strike missions, suppress-the-air-defence operations, and reconnaissance. Integrating an indigenous engine is seen as vital to ensuring supply-chain sovereignty and reducing dependency on foreign powerplants.
The Kaveri programme itself has a checkered history. Originally launched in 1983 as a joint Indo-French project with Snecma of France, it transitioned to an entirely Indian effort after the partnership dissolved in the early 1990s due to technical disagreements and delays. The original goal was to power the Light Combat Aircraft (LCA) Tejas, but repeated setbacks pushed the timeline by over two decades. Subsequent variants, including the semi-compact and full-afterburner versions, faced developmental hurdles before the current pragmatic dry-engine approach gained traction.
Defence analysts say the successful completion of this latest test phase is a turning point. If installed-condition trials proceed without major issues, the Kaveri dry engine could be flight-qualified within the next 18 to 24 months, potentially entering limited production for the Ghatak by the end of the decade. This would mark India's first fully indigenous military turbine engine to reach operational deployment status.
The Russian collaboration, while not publicly detailed, is understood to involve access to specialized test rigs and high-altitude simulation facilities that complement India's domestic infrastructure at places like the Aero-Engine Test Complex in Bengaluru and the National Airborne Systems Establishment in Nagpur.
