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Solid Fuel Ducted Ramjet Missile Tested by DRDO

Solid Fuel Ducted Ramjet Missile Tested by DRDO


  • GS3 || Science & Technology || Defence || Military Technology

 Why in news?

  • Defence Research and Development Organisation (DRDO) successfully flight tested the second indigenously developed ‘Solid Fuel Ducted Ramjet (SFDR)’ propulsion based missile system.

 Solid Fuel Ducted Ramjet (SFDR):

  • It is a missile propulsion technology jointly developed by India and Russia.


  • It will help both India’s surface-to-air and air-to-air missiles to perform better and enhance their strike range, making them more lethal.
  • With it, India can have fastest long-range missiles in two categories, providing full-fledged and multi-layered aerial protection from hostile attacks.
  • Its successful use in missiles will mark India’s entry into select club of nations that use next-generation missile technology against manoeuvring targets, compromising effectiveness of conventional missiles. 

What is ramjet?

  • Ramjet is a form of air-breathing jet engine that uses the vehicle’s forward motion to compress incoming air for combustion without a rotating compressor.
  • Fuel is injected in the combustion chamber where it mixes with the hot compressed air and ignites.
  • A ramjet-powered vehicle requires an assisted take-off like a rocket assist to accelerate it to a speed where it begins to produce thrust.

Important facts for prelims – About air to air missiles

  • An air-to-air missile (AAM) is a missile fired from an aircraft for the purpose of destroying another aircraft.
  • AAMs are typically powered by one or more rocket motors, usually solid fuelled.

India’s air to air missiles :

  • Astra (missile) – All weather beyond-visual-range air-to-air missile developed by the Defence Research and Development Organisation, India.
  • It is the first air-to-air missile developed by India. (Used in Sukhoi) [Operational range of Astra – 80 ~110km]
  • Future development – DRDO plans to develop a Mk 2 variant of Astra with a larger engagement envelope and a range of 100 km (62 mi). Multiple different propulsion systems have been considered, including liquid-fuel ramjet, solid-fuel ramjet and dual pulse solid rocket motor.