"The Indian Space Research Organisation (ISRO) has successfully test fired on Sunday, Aug. 28, a pair of its own scramjet engines – an airbreathing ramjet in which combustion takes place in a supersonic airflow. The engines were tested during a sub-orbital flight of ISRO’s Advanced Technology Vehicle (ATV).
Weighing 3,277 kilograms, the ATV sounding rocket, based on the Rohini RH-560, lifted off the Satish Dhawan Space Centre (SDSC) in Sriharikota at 6:00 a.m. local time (8:30 p.m. EDT, Aug. 27). The flight, lasting about five minutes, was India’s first experimental mission of the scramjet engine technology, in order to the develop an indigenous air-breathing propulsion system.
ISRO noted that the successful test is a modest but important milestone toward designing and developing advanced air-breathing engines. These scramjets could be used in India’s future space transportation system."