- Why in news
- On 3 February 2026, DRDO successfully demonstrated Solid Fuel Ducted Ramjet (SFDR) technology from the Integrated Test Range, Chandipur, off Odisha.
- What it is
- A Solid Fuel Ducted Ramjet is a missile propulsion system. A booster takes the missile to the required speed, then a ramjet motor burns solid fuel using air taken in from the atmosphere. This lets a missile carry more fuel and sustain speed over long range, which suits long-range air-to-air missiles.
- Test site
- The demonstration was held at the Integrated Test Range, Chandipur, off the coast of Odisha, on the Bay of Bengal.
- Subsystems tested
- The Nozzle-less Booster, the SFDR motor and the Fuel Flow Controller all performed as expected.
- Intended use
- The technology enables long-range air-to-air missiles that give a tactical edge over adversaries.
- Laboratories involved
- Scientists from DRDL, HEMRL, Research Centre Imarat and ITR monitored the launch.
- Ramjet principle
- A ramjet has no compressor or turbine. It needs forward speed to compress incoming air, so it cannot start from rest and needs a booster.
Don’t confuse with Ramjet vs scramjet: A ramjet slows incoming air to subsonic speed before combustion. A scramjet burns fuel in supersonic airflow.
Don’t confuse with SFDR vs liquid-fuel ramjet: SFDR burns solid fuel regulated by a flow controller. Liquid ramjets use liquid fuel.
Defence: Prelims tests exercises (with whom), equipment (who makes it) and firsts.
Why it matters
- Strengthens indigenous missile propulsion and self-reliance in defence technology.
- Could extend the range and sustain the speed of air-to-air missiles.
Problems
- Moving from a technology demonstration to a deployable, reliable missile takes further trials.
Way forward
- Conduct further trials and integrate the system with seekers and aircraft, with industry participation.
Put in your answer
SFDR demonstration, Feb 2026: DRDO tested SFDR technology at ITR Chandipur, with all subsystems performing as expected.
UPSC’s own questions that come close to this issue, from our Prelims and Mains banks.
Prelims practice · Single answer
Ours, not from a UPSC paper
Consider the following statements about the Solid Fuel Ducted Ramjet (SFDR) technology recently demonstrated by DRDO:
Which one of the following is correct?
True or false?
1 of 7
Statements the way Prelims prints them. Say first, then see the fact.
1.The Solid Fuel Ducted Ramjet demonstration was conducted from the Integrated Test Range, Chandipur, off the coast of Odisha.
True. The test was held at ITR Chandipur, Odisha.
2.The SFDR system was first propelled to the desired Mach number by a ground booster motor.
True. A ground booster motor initially propelled the system.
3.The technology is meant for developing long-range air-to-air missiles.
True. It enables long-range air-to-air missiles.
4.The Fuel Flow Controller was among the subsystems that performed as expected in the test.
True. Nozzle-less Booster, SFDR motor and Fuel Flow Controller all performed as expected.
5.The test was carried out from the Pokhran range in Rajasthan.
False. It was held at ITR Chandipur, Odisha.
6.A ramjet engine uses a turbine-driven compressor to draw in air at all speeds, including from rest.
False. A ramjet has no compressor or turbine and needs forward speed to compress air, so it needs a booster.
7.The SFDR technology is intended mainly for surface-to-surface ballistic missiles.
False. It is intended for long-range air-to-air missiles.
Written by us from the release, not by UPSC; checked by a second model.
Worth revising until Prelims 2027: most news questions come within two years of the event.