Defence Research and Development Laboratory (DRDL), Hyderabad, has achieved a major milestone in India’s hypersonic weapons programme by successfully conducting a long-duration ground test of an Actively Cooled Scramjet Full Scale Combustor. The test ran for over 12 minutes at the Scramjet Connect Pipe Test (SCPT) facility, marking step towards the development of hypersonic cruise missiles. The achievement builds on an earlier subscale test and strengthens India’s advanced aerospace and missile capabilities.
Key Development
The full-scale combustor test validated the performance of the scramjet design under extended operating conditions. It also demonstrated the effectiveness of the actively cooled combustor technology, which is essential for sustaining very high temperatures during hypersonic flight. The test is considered a critical milestone in the development of air-breathing propulsion systems for future missiles.
What Is a Scramjet?
A scramjet, or supersonic combustion ramjet, is an air-breathing engine designed for hypersonic speeds. It allows combustion to take place while air flows through the engine at supersonic speed. Such engines are vital for hypersonic cruise missiles, which can travel at more than five times the speed of sound, or above 6,100 km/hr.
Importance of the Test Facility
The SCPT facility was designed and developed by DRDL and realised with industry partners. The facility enables long-duration ground testing of advanced combustor systems. Successful testing at this facility confirms both the design of the combustor and the capability of the test infrastructure.
Significance for India
The milestone supports India’s Hypersonic Cruise Missile Development Programme. It places the country among the leading nations working on advanced hypersonic propulsion technologies. The achievement also reflects growing collaboration between DRDO, industry, and academia in strategic defence research.
Last Modified: April 25, 2026