The EVEREST engine has a specific impulse of around 340 seconds, and a deep throttle range of 50 to 110%. The wide throttle capability is essential for precise trajectory control during ascent, for controlled deceleration during atmospheric entry, and for soft landing of a reusable booster. Methane is chosen as the fuel because it burns more cleanly than kerosene, producing far less soot, which greatly simplifies post-flight inspection and refurbishment and supports rapid turnaround between flights. Core components of the engine are manufactured using large-scale metal additive manufacturing. Astrobase installed what it describes as India’s largest industrial metal 3D printer at their facility in Bengaluru specifically to produce the intricate, high-complexity parts required by the FFSC architecture. More than 70% of the engine is indigenously designed and manufactured, with imports limited to specialised sensors and components not yet available in India. Astrobase Space Technologies was founded in 2024 by Neeraj Khandelwal, an IIT Bombay alumnus and co-founder of CoinDCX, and Devakumar Thammisetty, a former ISRO propulsion scientist with more than 13 years of experience in cryogenic systems. Devakumar Thammisetty contributed to the upper stages of the GSLV Mk II and Mk III vehicles, the Chandrayaan programme and early human-spaceflight propulsion work, and later completed advanced studies focused on rocket reusability at EPFL in Switzerland. The company operates a vertically integrated setup. The Bengaluru facility handles design, 3D printing, assembly and subsystem testing, while their 21.5-acre private propulsion test site in Andhra Pradesh provides the high-thrust cryogenic test stands capable of handling engines up to roughly 200 tonnes of thrust. Development of the EVEREST programme began shortly after the company’s founding. A sub-scale version of the engine was successfully hot-fired in September 2025 on the first attempt, validating combustion stability, materials behaviour and flow paths. High-speed turbopump cold-flow testing followed in January 2026. The turbopumps handle power levels on the order of five megawatts while pumping dense, high-pressure liquid oxygen, and the company reported that measured performance exceeded predictions. Full-scale integrated engine hot-fire testing is scheduled to begin in the coming months at the Anantapur facility, followed by stage-level static firings. Astrobase plans to manufacture and hot-fire approximately twenty engines before attempting its first orbital flight, currently targeted for December 2028. Once production is fully scaled the company intends to build up to fifty (and in some statements sixty) engines per year and to conduct roughly one high-thrust hot-fire test per week. The engine is intended to power Astrobase Space's two-stage reusable launch vehicle.