Raman Engine
{{Short description|Rocket engine manufactured by Skyroot Aerospace}}
{{Infobox rocket engine
| name = Raman
| image =
| fuel = UDMH
| oxidizer = {{N2O4}}
| status = Under Development
| country_of_origin = India
| type = liquid
| thrust = {{cvt|850|N}}
| caption = 3D Printed Raman Engine
}}
Raman Engine is a bipropellant rocket engine manufactured by Skyroot Aerospace that will be used in its Vikram family of rockets.{{Cite web|date=2020-08-17|title=First Indian start-up firm Skyroot Aerospace to test fire rocket engine 'Raman': All you need to know|url=https://www.jagranjosh.com/general-knowledge/skyroot-aerospace-to-test-fire-rocket-engine-raman-1597670857-1|access-date=2022-01-25|website=Jagranjosh.com}} It is named after Indian Nobel laureate Sir C.V. Raman.
Description
It uses UDMH and NTO hypergolic propellants.{{Citation|title=Skyroot Aerospace: Raman Engine Test Fire|url=https://www.youtube.com/watch?v=GgEWn2N4uNk|language=en|access-date=2022-01-25}} Its injector plate is completely 3D printed. This engine will be used in a cluster of 4 in the fourth stage of the Vikram 1 rocket, which can produce a thrust of 3.4 kN each producing 850 N of thrust, which is lower than many other rocket engines, but is required for precise orbit adjustments.{{Cite web|title=With ISRO assistance, India's Skyroot Aerospace aims maiden rocket launch by Dec-2021|url=https://www.wionews.com/india-news/with-isro-assistance-indias-skyroot-aerospace-aims-maiden-rocket-launch-by-dec-2021-320835|access-date=2022-01-25|website=WION|language=en}}{{Citation|title=Exclusive Details of Skyroot's Raman Engine|url=https://www.youtube.com/watch?v=AiLOhj9PXEM|language=en|access-date=2022-01-25}}
Development and Testing
- On 12 August 2020, Skyroot Aerospace successfully tested the engine for the first time.{{Cite news|last=Narasimhan|first=T. E.|date=2020-08-12|title=Skyroot Aerospace first private company to test upper stage rocket engine|work=Business Standard India|url=https://www.business-standard.com/article/companies/skyroot-aerospace-first-private-company-to-test-upper-stage-rocket-engine-120081200445_1.html|access-date=2022-01-25}}
- Skyroot Aerospace tested the Raman-2 engine, designed for vacuum conditions, by firing it for 200 seconds on a ground test stand. The team used water injection to mitigate flow separation in the vacuum-optimized nozzle, allowing accurate testing at sea level. This test provided critical data for the Vikram-1 rocket's fourth stage, advancing India's private space efforts. {{Cite web |date=18 April 2025 |title=Skyroot Aerospace Successfully Tests Raman-2 Engine with Water Injection for Vikram-1 Rocket |url=https://x.com/SkyrootA/status/1913109224726700415 |url-status=live |website=twitter.com}}