“This will increase the LVM3 payload capacity to 450 kg with additional propellant loading. The major modification made in this test article was the introduction of thrust control valves (Thrust Control Valve) compared to previous engines.TCV) for thrust control,” ISRO said.
Additionally, the space agency stated that a 3D-printed locks (Liquid Oxygen) and LH2 (Liquid Hydrogen) turbine exhaust casings were incorporated into the engine for the first time.
“During this test, the engine first operated with a thrust level of about 20t for 40 seconds, then the thrust level was increased to 21.8t by rotating the thrust control valve. Engine and facility performance was normal and required parameters were achieved,” ISRO said.
TOI had reported on October 31 that LVM3 is gearing up for its second commercial launch, early 2023, as ISRO’s efforts to increase its lifting capacity are gaining momentum with the space agency qualifying for the semi-cryogenic stage. Looking forward to completing the test. (SC120) in a few months.
ISRO spokesperson Sudhir Kumar had then told TOI: “The (LVM3) program was envisaged to eventually carry at least 10 tonnes Leo And six tons for GTO classes. We will achieve this with the upgrade of the cryo stage with additional propellant loading and induction of the semi-cryo stage which will replace the L110…”
semi-cryo
Work on the semi-cryo engine is nearing completion and qualification tests are on. The phase and engine development phase is completed and the test stand is getting ready to test.
“Sub-system level trials are currently underway at the testing facilities in Mahendragiri and LPSC (Liquid Propulsion System Centre),” Kumar said.
The GSLV-Mk3 is a three-stage vehicle with two solid strap-on motors (S200), a liquid core stage (L110) and a high-thrust cryogenic upper stage (C25). While the S200 will remain the same, the SC120 will replace the L110 and the C25 will be upgraded. The qualification of SC120 is expected to be completed in a few months unless discrepancies are found.