The materials and methods that made the Vikram-1 launch unique, Pg2

Key Highlights:

• Skyroot Aerospace, a Hyderabad-based firm, successfully launched its Vikram-1 rocket on July 18 from ISRO’s First Launch Pad at Sriharikota.
• The mission, named 'Aagaman', placed its payloads into an orbit approximately 450 km above Earth.
• This achievement makes India the third country, after the U.S. and China, where a private industry can independently achieve orbital launch capability.
• Vikram-1 utilized advanced manufacturing techniques, including 3D printing for its engine and a carbon-fibre composite airframe.
• The rocket carried five working payloads, including a robotic-arm demonstrator and satellites from various firms.

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Detailed Insights:

• The successful launch signifies a major milestone for India's private space sector, transitioning ISRO from a gatekeeper to a landlord for launch services.
• 3D printing allows for lighter, more integrated rocket engines with fewer components, reducing manufacturing time and potential failure points.
• The carbon-fibre composite body of Vikram-1 offers significant weight savings and enhanced strength compared to traditional aerospace metals.
• Vikram-1 is a four-stage expendable rocket, similar to PSLV and SSLV, but designed specifically for small satellite launches.
• While ISRO's SSLV has a higher payload capacity (500 kg vs. Vikram-1's 350 kg), Vikram-1's all-carbon airframe is leaner.
• The mission's success, including the 'long coast' phase, is notable as many maiden flights of new rockets often encounter initial setbacks.
• Other private players like AgniKul Cosmos are also advancing, with their Agnibaan SOrTeD vehicle featuring a 3D-printed semi-cryogenic engine.
• The 2020 reforms and the creation of IN-SPACe in 2022 have significantly boosted the growth of Indian space startups, now numbering over 400.

Scientific/Technical Concepts Involved:

• 3D Printing (Additive Manufacturing): A process of creating three-dimensional objects by building layers of material from a digital design.
• Carbon-fibre Composite: A material made of carbon fibers embedded in a polymer resin, known for its high strength-to-weight ratio.
• Orbital Adjustment Module (OAM): A small, restartable liquid-fueled stage used for precise orbital insertion and adjustments of payloads.
• Semi-cryogenic Engine: A rocket engine that uses liquid oxygen as an oxidizer and a refined form of kerosene (RP-1) as fuel, operating at less extreme temperatures than fully cryogenic engines.