In January 2026, DRDO successfully conducted a long-duration ground test of an Actively Cooled Scramjet Engine for the development of ___________.
Hypersonic cruise missiles
A scramjet (supersonic combustion ramjet) is an air-breathing engine in which combustion takes place in a supersonic airflow. It lets a vehicle keep flying at hypersonic speeds (above Mach 5) for long durations.
In January 2026, DRDO's Defence Research and Development Laboratory (DRDL), Hyderabad, carried out a long-duration ground test of an actively cooled scramjet combustor. 'Actively cooled' means fuel circulates around the engine walls to absorb the extreme heat of sustained hypersonic flight.
This technology is a key step towards India's hypersonic cruise missile programme.
Reusable launch vehicles are space-launch programmes led by ISRO. Unmanned combat aerial vehicles use turbofan or jet engines, not scramjets. Ballistic missile defence relies on interceptor missiles that follow different propulsion routes.
Hence, the answer is Hypersonic cruise missiles.
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