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=== Hypersonic technology ===
[[File:Scramjet_engine_for_Hypersonic_Cruise_Missile.jpg|thumb|Scramjet engine test for 1000 seconds in April 2025]]
A 120-second ground test of an Active Cooled [[Scramjet]] Subscale Combustor for next-generation missiles was conducted by the DRDL at Scramjet Connect Test Facility at [[Hyderabad]] on 21 January 2025.<ref>{{cite news |date=21 January 2025 |title=DRDO conducts Scramjet Engine Ground Test |url=https://pib.gov.in/PressReleasePage.aspx?PRID=2094886 |access-date=21 January 2025 |publisher=Press Information Bureau |agency=Ministry of Defence, Government of India.}}</ref><ref>{{Cite web |last=Philip |first=Snehesh Alex |date=2025-01-21 |title=Boost for India as DRDO successfully conducts scramjet engine ground test for hypersonic missiles |url=https://theprint.in/defence/boost-for-india-as-drdo-successfully-conducts-scramjet-engine-ground-test-for-hypersonic-missiles/2455926/ |access-date=2025-01-21 |website=ThePrint |language=en-US}}</ref> The test showed stable combustion and successful ignition. Together with the [[Department of Science and Technology (India)|Department of Science and Technology]] and the private sector, DRDL has taken the lead in developing an improved ceramic [[thermal barrier coating]] (TBC), endothermic scramjet fuel, and a long-duration scramjet engine. A novel flame stabilization method was added to the scramjet combustor, which maintains a constant flame inside the combustor at air speeds greater than 1.5 km/s. In addition to improving cooling, the endothermic fuel shortens ignition times. With its excellent temperature resistance, the cutting-edge ceramic TBC can function above the melting point of steel.<ref>{{Cite web |last=Ray |first=Kalyan |date=21 January 2025 |title=DRDO achieves milestone on scramjet engines needed for hypersonic missiles |url=https://www.deccanherald.com/india/drdo-achieves-milestone-on-scramjet-engines-needed-for-hypersonic-missiles-3366484 |access-date=2025-01-21 |website=Deccan Herald |language=en}}</ref><ref>{{Cite web |last1=Sharma |first1=Shivani |last2=Negi |first2=Manjeet |date=2025-01-21 |title=India achieves milestone in hypersonic technology with 1st scramjet test success |url=https://www.indiatoday.in/india/story/india-achieves-milestone-in-hypersonic-technology-first-scramjet-test-success-2668210-2025-01-21 |access-date=2025-01-21 |website=India Today |language=en}}</ref>
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