Beyond BrahMos: India Tests Engine for Next Generation Hypersonic Cruise Missiles

India has taken a major step toward developing a new generation of hypersonic cruise missiles , with the Defence Research and Development Organisation successfully testing a full scale, actively cooled scramjet combustor for more than 1200 seconds at its Hyderabad facility.

The test, conducted by DRDO’s Defence Research and Development Laboratory at the Scramjet Connect Pipe Test facility on May 9 , builds on an earlier successful run of over 700 seconds in January. The Ministry of Defence said the long duration ground test validated the design of the advanced combustor, its active cooling system, indigenous endothermic liquid hydrocarbon fuel, thermal barrier coating and advanced manufacturing processes.

The importance of the test lies in where it can take India’s missile programme next. India already has a mature ballistic missile family, including Agni and Prithvi , which are rocket powered missiles that rise high, follow a ballistic arc and re-enter the atmosphere at extremely high speeds. It also has BrahMos , a ramjet powered supersonic cruise missile that flies within the atmosphere at around Mach 2 to Mach 3 .

A scramjet opens a different path. Unlike a ballistic missile, a scramjet powered weapon would not simply climb and fall along a high arc. It would fly through the atmosphere like a cruise missile, but at hypersonic speeds above Mach 5 . That makes it technologically far more demanding than BrahMos. At those speeds, the engine must burn fuel in supersonic airflow while surviving extreme heat, which is why the success of the actively cooled combustor is significant.

The technology could eventually support either a future hypersonic BrahMos type missile , often discussed as a next generation BrahMos concept, or an entirely new indigenous hypersonic cruise missile class . It would not be a simple upgrade of the existing BrahMos, because a ramjet powered supersonic missile and a scramjet powered hypersonic missile require very different engine, materials, fuel and thermal protection systems.

The closest Russian comparison to India’s current direction is Zircon , described as a scramjet propelled hypersonic cruise missile. Russia’s Oniks , from which BrahMos draws its lineage, is closer to BrahMos as a supersonic cruise missile. Russia’s Iskander and Kinzhal , meanwhile, are ballistic or quasi ballistic systems that reach hypersonic speeds, but are not scramjet powered cruise missiles in the same category.

The United States remains the world’s strongest military power overall, backed by unmatched naval reach, air power, satellites, logistics, alliances, technology depth and economic strength. But in the specific field of fielded conventional hypersonic weapons, it has lagged Russia and China, while India has built a strong supersonic cruise missile base through BrahMos and is now moving deeper into hypersonic propulsion. Washington is developing systems such as Dark Eagle , Conventional Prompt Strike and the Hypersonic Attack Cruise Missile , but several programmes have faced delays and restructuring.

Defence Minister Rajnath Singh congratulated DRDO, industry partners and academia, calling the test a solid foundation for India’s hypersonic cruise missile development programme. DRDO Chairman Dr Samir V Kamat also praised the teams involved.

For India, the achievement is not just another laboratory milestone. It signals a transition from being a country with ballistic missiles and supersonic cruise missiles to one preparing for the next frontier: sustained, air breathing, hypersonic cruise flight.