🚨 𝗢𝘁𝗵𝗶𝘀𝗶𝘀 𝗦𝘆𝘀𝘁𝗲𝗺𝘀 𝘁𝗲𝘀𝘁𝗳𝗶𝗿𝗲𝘀 𝗠𝗲𝘁𝗵𝗮𝗹𝗼𝘅 𝗲𝗻𝗴𝗶𝗻𝗲, 𝗵𝗼𝗽𝗽𝗲𝗿 𝗳𝗹𝗶𝗴𝗵𝘁 𝗶𝗻 𝟮𝟬𝟮𝟲, 𝗼𝗿𝗯𝗶𝘁𝗮𝗹 𝗹𝗮𝘂𝗻𝗰𝗵 𝗶𝗻 𝟮𝟬𝟮𝟴! 🚀 Bengaluru-based student-led startup Othisis Systems has recently testfired a 3D-printed (SLM) Methalox rocket engine that for their upcoming reusable orbital launch vehicle! 🔥 The engine has 5 kN thrust at 35 bar chamber pressure with regenerative & film cooling. It uses a modular pintle injector that allows the engine to able to be re-specced across different propellant combinations or thrust points by swapping a single component rather than redesigning the whole engine. During the recent testfire, the engine was operated at reduced pressures for end-to-end validation of the system, and Othisis will incrementally work their way up towards validating the engine at full thrust and chamber pressure for longer durations. They're developing this engine for the upper stage of their upcoming orbital-class launch vehicle capable of launching upto 1,500 kg payloads into 500 km Low Earth Orbit, featuring first stage booster recovery via Return To Launch Site propulsive landing! The first launch of this launch vehicle is planned to take place from SHAR in Q4, 2028! Othisis is also developing a VTVL hopper vehicle based around this engine. This hopper vehicle forms the first stage of their broader roadmap to developing their orbital launcher! This first suborbital hop flight of this vehicle is aimed to take place by the end of 2026! (Othisis Systems founder Syed Affan to ISRO Spaceflight)