India has developed its first indigenous expendable turbojet engine in the 350-kg thrust class, delivered on 22 July 2026.
It was designed by DRDO's Gas Turbine Research Establishment (GTRE) and manufactured by Azad Engineering, Hyderabad.
An expendable engine is built for single use, making it suited to missiles and unmanned systems that are not recovered.
The engine was realised in about 24 months, underlining private-sector capability in aerospace.
It is expected to power cruise missiles, loitering munitions and unmanned aerial vehicles.
A turbojet produces thrust by drawing in air, mixing it with fuel, igniting the mixture and expelling the hot gases through a nozzle. An expendable turbojet is deliberately built for a single flight: it powers a missile or drone to its target and is destroyed with it, so it does not need the durability, servicing or reusability of an aircraft engine. That lets designers make it smaller, cheaper and simpler while still delivering reliable, consistent performance for one mission.
Simple Analogy: It is the difference between a car engine, built to run for years, and a firework's motor, built to fire once and be spent.
DRDO laboratory that designs and develops gas turbine propulsion for military platforms; also develops the Kaveri engine
India's premier defence R&D agency under the Ministry of Defence
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The forward force produced by an engine; here rated in the 350-kg class.
A weapon that can circle over an area before striking, sometimes called a suicide or kamikaze drone.
Gas Turbine Research Establishment, the DRDO lab for gas turbine propulsion, based in Bengaluru.