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On 3 March 2010, ISRO successfully conducted the [[flight test]] of its new sounding rocket ATV-D01 from [[Satish Dhawan Space Centre]] in [[Sriharikota]]. ATV-D01 weighed 3 tonnes at lift-off and was the heaviest sounding rocket ever developed by ISRO at the time. It was mounted with a passive [[Scramjet]] engine. The [[rocket]] flew for 7 seconds, achieved [[Mach number]] 6 + 0.5 and dynamic pressure 80 + 35 [[kPa]].<ref name="Flight testing of advanced sounding rocket">{{cite news|title=Flight testing of advanced sounding rocket|publisher=[[ISRO]] website|access-date=23 May 2016|url=http://www.isro.gov.in/update/03-mar-2010/successful-flight-testing-of-advanced-sounding-rocket|archive-date=9 September 2016|archive-url=https://web.archive.org/web/20160909115917/http://www.isro.gov.in/update/03-mar-2010/successful-flight-testing-of-advanced-sounding-rocket|url-status=dead}}</ref><ref name="Khul Ke l708">{{cite web | title=ISRO Progresses Towards a Swadeshi Space Plane | website=Khul Ke | url=https://www.khulke.com/roundtable/recorded/642eeb22714e9eae0bbcc7d7 | access-date=2023-09-07 | archive-date=2023-09-07 | archive-url=https://web.archive.org/web/20230907091949/https://www.khulke.com/roundtable/recorded/642eeb22714e9eae0bbcc7d7 | url-status=live }}</ref>
On 28 August 2016, ISRO tested scramjet engine with a five-minute flight. At a height of 20 kilometers, the scramjet engine attached to a two-stage RH-560 sounding rocket was fired. The engine burnt fuel for five seconds before falling into the Bay of Bengal.<ref>{{Cite news |date=2016-08-28 |title=ISRO successfully tests scramjet engine using oxygen from atmosphere |url=https://timesofindia.indiatimes.com/city/chennai/isro-successfully-tests-scramjet-engine-using-oxygen-from-atmosphere/articleshow/53892013.cms |access-date=2024-07-23 |work=The Times of India |issn=0971-8257}}</ref>
On 23 July 2024, ISRO effectively concluded the second experimental flight demonstration of air breathing propulsion technology. Air Breathing Propulsion systems were symmetrically placed on both sides of the RH-560 sounding rocket used in the experiment. The Air Breathing propulsion systems were ignited successfully and the test performed satisfactorily. 110 parameters were extensively watched during the flight to evaluate the propulsion system's performance.<ref>{{Cite web |date=2024-07-23 |title=Isro successfully conducts second test of Air Breathing Propulsion Technology |url=https://www.indiatoday.in/science/story/isro-successfully-conducts-second-test-of-air-breathing-propulsion-technology-2570706-2024-07-23 |access-date=2024-07-23 |website=India Today |language=en}}</ref>
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