ISRO successfully tests PS4 engine re-designed using additive manufacturing techniques
May 10, 2024, 06:21 PM ISTISRO recently successfully hot tested the PS4 engine of PSLV upper stage, which was made using the Additive Manufacturing concept. The engine is used in the fourth stage of PSLV and in the Reaction Control System (RCS) of the first stage (PS1) of PSLV.