The long wait for indigenous engines
We must acquire or purchase arcane technologies from wherever available, regardless of cost
Updated At : 02:59 AM Feb 16, 2026 IST
A major dampener on India’s enthusiastic claims of
Atmanirbharta (self-reliance) has been the persistent absence of domestically designed and manufactured “prime movers” — the engines that power major military platforms. Whether installed on Indian-built fighters, destroyers, submarines or tanks, none of these critical power plants — gas turbines, diesel engines or electric motors — are fully indigenous.
A long-awaited breakthrough has been the DRDO’s recent development, in collaboration with Bharat Earthmovers Ltd, of a 1,500-horsepower diesel engine. While this may pave the way for India’s future tanks and armoured vehicles to be powered by an indigenous engine, the failure to develop families of aviation and marine gas turbine engines will severely limit its military aviation and naval capabilities. The consequences are serious: heavy dependence on foreign suppliers and heightened operational vulnerability during times of conflict.
All aircraft in the IAF’s current inventory — fighters, transports or helicopters — are powered by aero-engines that are either imported or built/assembled by Hindustan Aeronautics Ltd under foreign licences. Of greater concern is the fact that all versions of the indigenous Tejas fighter as well as future projects like the Advanced Medium Combat Aircraft (AMCA) are currently tethered to US-built engines.
In the Indian Navy (IN), smaller warships and submarines are driven by diesel engines, but all frontline destroyers, frigates and (one) aircraft carrier are now powered by gas turbines. While marine diesel engines are built in India under French, German and US licences, all gas turbine engines are imported from just two sources; Ukraine and the US. Since Ukraine’s reliability as a supplier has been seriously diminished by the ongoing conflict with Russia, the US may become the sole source of gas turbines for future IN warships.
This abject reliance on foreign sources represents a critical Achilles’ heel for India’s strategic autonomy. In the context of indigenous R&D, a brief review of the DRDO’s Kaveri aero-engine project should serve as a sobering case study.
In 1986, the DRDO’s Gas Turbine Research Establishment (GTRE) was tasked to initiate the GTX-35VS Kaveri aero-engine project, meant to power the Tejas Light Combat Aircraft (LCA). Full-scale development began in 1989 with 17 prototype engines budgeted at $55 million. The first engine was tested in 1996, but a 2004 airborne trial on a Russian flying testbed yielded disappointing results — a thrust shortfall as well as overheating issues.
While the GTRE was still struggling with Kaveri’s design and engineering challenges, the prototype Tejas urgently needed an engine, and the choice fell in 2004 on the US-made General Electric F-404 turbofan. As this engine was duly installed and successfully flown on the Tejas in 2008, the project became inexorably committed to the US F-404 engine family.
Reports in 2014-15 indicated that the DRDO, having spent over Rs 2,100 crore without attaining performance targets, had decided to close the Kaveri project. All this while, reports had been circulating about the GTRE’s opaque and unsuccessful quest for obtaining technical consultancy from French and British engine manufacturers. Talks reportedly collapsed over costs and quantum of technology transfer being sought/offered. The MoD and service HQs remained silent observers throughout.
At one point, the IN had proposed a marine derivative of the Kaveri to power its future warships. After a brief consideration, this proposal was rejected, and in 2016, the DRDO decided to revive the project in the form of a less powerful version for powering the indigenous Ghatak unmanned aerial vehicle. A glimmer of hope has emerged from recent reports that the IN has revived a project for the design and development of a marine gas turbine engine, to be taken up by a consortium of DRDO laboratories and private sector firms. While this vital initiative is unlikely to deliver results in less than a decade, it would be a case of “better late than never”.
The failed Kaveri project bears an interesting comparison with China’s achievements in the field of aero-engines. Recognising their pivotal role in military aviation, Chairman Deng Xiaoping initiated a jet engine project in 1986. China managed to transform its military-industrial complex (from a 1950s industrial baseline, akin to India’s) through a long-term, visionary campaign, encompassing a reverse engineering programme, unhampered by regard for intellectual property rights.
After spending billions and encountering many failures, China’s WS-10 aero-engine project, based on the licence-produced French-American CFM-56 engine, was crowned with success. The WS-10 and subsequent versions now power the bulk of the People’s Liberation Army Air Force’s current fighter fleet, and more powerful types are on the way.
So, what lessons should India learn from the dismal Kaveri saga, especially when placed alongside China’s reported success? In my opinion, this unhappy situation can be attributed to a number of institutional shortcomings that need to be addressed on priority.
Firstly, there has been insufficient appreciation at the political level of the vital importance of R&D as well as the long gestational periods involved and heavy funding demanded by military-industrial projects. This is manifest in political indifference towards vital projects like Tejas, Kaveri and the Arjun battle tank, which were allowed to drift for decades. Secondly, there has been failure on the part of DRDO scientists to show long-term vision and pursue, with resolve, engine-related R&D for military platform projects like fighters, ships, submarines and tanks. Thirdly, the military’s leadership has consistently failed to take “ownership” of such projects and impart necessary impetus to their urgent pursuit.
Fourthly, as a nation, we need to face the fact that arcane technologies are hard to come by, and it may be more cost-effective, in national interest, to acquire or purchase them from wherever available — regardless of cost — rather than to struggle ineffectively, wasting time. Finally, it is time to shed our embedded bias against the private sector, and force R&D out of the “silo” of DRDO labs and into a collaborative model with private industry in the larger national interest.
Without mastering the technology of military “prime movers”, India’s claims of self-reliance will remain hollow, rendering its strategic autonomy hostage to foreign powers.
The dismal Kaveri saga can be attributed to institutional shortcomings that need to be addressed on priority.
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