India Shifts Loitering Munition Strategy from Propellers to Turbojets for Enhanced Performance

India's Loitering Munition Sector Sees Major Upgrade with Turbojet Engines

The Indian defence sector is witnessing a significant shift in its loitering munition capabilities, moving away from traditional propeller-driven systems and towards more advanced, compact turbojet engines. This upgrade promises to enhance the range, speed, and reaction time of these munitions, making them more formidable against enemy air-defence systems.

The Limitations of Traditional Propeller-Driven Systems

Traditionally, loitering munitions have relied on electric motors or small internal combustion engines with propellers. While these systems offer benefits such as limited logistics, endurance, and low operating costs, they also come with significant limitations. The slow speed of these munitions can give defenders ample time to detect, classify, and engage them, rendering them ineffective.

The Advantages of Turbojet Engines

The advent of lightweight turbojet propulsion has revolutionized the loitering munition sector. Compact expendable turbojet engines can propel these munitions to speeds of up to 300-400km/h, significantly reducing the time available for defenders to respond. This makes the munitions more akin to a middle-ground between tactical drones and cruise missiles, offering a unique combination of speed, range, and precision.

The Divyastra Mk3: A Pioneer in Turbojet-Propelled Loitering Munitions

The Divyastra Mk3, developed by Uttar Pradesh-based Kawa UAV or HoverIt, is a prime example of India's private defence manufacturing industry's growing involvement in developing advanced, independent strike systems. The programme has progressed at an unprecedented pace, with the first flight scheduled for August 2026, just eight months after the initial concept was conceived.

Key Features of the Divyastra Mk3

The Divyastra Mk3 boasts a locally designed airframe, powered by a custom-made turbojet engine developed by DG Propulsion. The propulsion architecture is noteworthy, with the engine emerging as a crucial technology enabler for high-speed, autonomous strike ordnance. The claimed performance space of the Divyastra Mk3 is impressive, with a range of around 500km, high subsonic dash, and swarming capabilities enabled by AI.

The Rise of India's Home-Grown Propulsion Business

The development of the Divyastra Mk3 showcases the growing significance of India's home-grown propulsion business. The airframe has long been the most obvious component of an unmanned system, while engines have been reliant on imported technologies. The emergence of small turbojet producers in the country could change this paradigm, enabling the development of more sophisticated, indigenous propulsion systems.

DRDO's Research into Loitering Munition Concepts

Sources at DRDO labs have revealed that they are working on developing a stealth-based loitering munition with an indigenous 350-kg-thrust expendable turbojet. This project aims to create a system with a range of around 500km, further expanding India's capabilities in the loitering munition sector.

The Future of Loitering Munitions in India

The evolution of loitering munitions in India is expected to create a series of independent strike weapons, ranging from cheaply operated electrically powered weapons on the battlefield to more capable turbojet-powered weapons capable of breaching more strongly defended regions. While propeller-driven loitering munitions will continue to play a crucial role in certain missions, turbojet propulsion is poised to offer a new layer of capabilities, particularly in scenarios where speed and minimization of engagement time are critical.

Key Takeaways

• India's loitering munition sector is undergoing a significant upgrade, with the adoption of compact turbojet engines offering enhanced range, speed, and reaction time.
• The Divyastra Mk3, developed by Kawa UAV or HoverIt, is a pioneering example of India's private defence manufacturing industry's growing involvement in developing advanced, independent strike systems.
• The development of indigenous turbojet engines is a crucial enabler for high-speed, autonomous strike ordnance, and is expected to play a key role in shaping India's future loitering munition capabilities.
• The evolution of loitering munitions in India is expected to create a series of independent strike weapons, ranging from electrically powered to turbojet-powered systems, each with unique capabilities and applications.