India Successfully Demonstrates SFDR Technology Critical For Development Of Long Range Air-To-Air Missiles by Swarajya Staff - Mar 5, 2021 09:59 AM Flight test of Solid Fuel Ducted Ramjet technology. Snapshot India is currently developing a 160-km range version of the Astra air-to-air missile. Earlier today, the Defence Research and Development Organisation (DRDO) tested its Solid Fueled Ducted Ramjet (SFDR) technology with a demonstration flight from the Integrated Test Range off the coast of Odisha. The test, DRDO said, helped prove many technologies and sub-systems, including the ground booster motor and nozzle less motor. The development of SFDR technology will enable India to make its own long-range air-to-air missile, which could mirror the capabilities of the best missiles in this class, like MBDAâs Meteor, which the Indian Air Force uses on its Rafales.