Bengaluru-based Prime Toolings has developed and unveiled India’s first indigenous Rotating Detonation Engine (RDE) prototype, representing a significant advancement in missile propulsion technology. The engine operates using continuous supersonic detonation waves, providing up to 25% better fuel efficiency and higher thrust with a lighter, more compact design without moving parts. The RDE prototype is in the 1–12 kilonewton thrust class and is intended for short-range tactical missiles with operational ranges of approximately 300 to 500 kilometers. It features an annular combustion chamber with advanced fuel injection and materials engineered to withstand extreme thermal and pressure conditions. Prime Toolings has utilized advanced manufacturing techniques such as additive manufacturing (3D printing) for critical components to ensure durability and thermal resilience. Initial ground tests have demonstrated stable detonation cycles and consistent thrust output, with further testing planned to validate performance under various conditions. This achievement aligns with India’s Atmanirbhar Bharat initiative, supporting self-reliance in defense technology and reducing dependence on foreign suppliers. Claims about the engine’s price or commercialization remain unverified and are excluded from this summary. This indigenous RDE development places India among a select group of nations pioneering next-generation propulsion systems for tactical missile applications and future aerospace technologies.