Next Generation Launch Vehicle (NGLV) / Project Soorya: News & Updates

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These numbers and configuration are very close to blue origin's New Glenn rocket.

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I don't think it's possible to develop and prove the LME2400 engine within the current time frame they are projecting. Maybe we should consider getting the BE-4 engine from Blue Origin as a stopgap solution?.
 
do we know the payload details? Its looks like there are no concrete details out there and so many websites have conflicting opinions
The configuration isn't fixed yet. ISRO started the NGLV design to make a partially re-usable heavy lift launch vehicle with max dia. of 5 m & a gross lift off mass of ~700 tons. The 1st variant was comparable with the Araine-6 or the Falcon 9 Heavy in size & payload capacity.

GoI had then set a target for ISRO to have a human moon landing in the 2040s. In preparation for the manned landing, un-crewed lunar descent & return missions have to start by around 2033-35. ISRO initailly thought they would design a separate rocket for the lunar missions called LMLV. Now they seem to have merged the NGLV & the LMLV into a single project.

A lunar manned mission will require a super heavy lift rocket. That's why the NGLV's base variant is getting bigger. From 5m dia & 700-ton GLOM, the design has evolved to 6.5 m dia & 1200-ton GLOM. The rocket is now comparable in size to the Blue Origin's New Glen. Look at post #27 for payload details of the latest configuration. I think they are under playing the payload capacity. As the design gets more refined those numbers will get updated.

NGLV is supposed to have its 1st flight around 2031. A variant of the NGLV (with 3x liquid Stage-1 boosters) will be used for these lunar missions.

On the engine side, ISRO was initially going for LME-110, a GG based Methalox engine. That engine won't produce enough thrust for the latest design of the rocket. So, ISRO will probably convert the SCE-200 into a Methalox engine. They are calling it the LME-240. Later they will uprate this engine to ~3MN class & call it LME-300.

LME-240 has to be ready for flight within the next 5 years. The speed of progress of the SCE-200 isn't very encouraging.