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Green Aero Propulsion Private Limited has successfully tested a sub-kN liquid-fuelled aero engine that utilizes airblast atomiser technology, aimed at powering high-speed drones and Collaborative Combat Aircraft. The recent test validated various subsystems, including turbomachinery and fuel injection.

The engine supports multiple fuels and features an electric start system and advanced cooling mechanisms. Manufactured with metal additive technology, it reduces part counts by nearly 70%. The propulsion unit targets the 20 kgf to 100 kgf thrust range.

Additionally, Green Aero has created a hydrogen-capable engine core called 'Blue Dragon'. The company raised USD 1.6 million in July 2025 and is establishing a propulsion test cell while recruiting engineers for further development.