Seems like India will have a fine engine for an RLV. Just cluster seven SC-200s like Blue Origin is doing with their BE-4 for the first stage.
Quote from: Steven Pietrobon on 01/11/2018 03:19 amSeems like India will have a fine engine for an RLV. Just cluster seven SC-200s like Blue Origin is doing with their BE-4 for the first stage.They have been toying with a design having a cluster of 5 engines for the first stage. Not sure if they can use the central engine for propulsive recovery in that configuration though. I'm guessing the engine would need to be capable of burning at a much lower than nominal thrust for that to work out.
Quote from: vineethgk on 01/11/2018 04:17 amQuote from: Steven Pietrobon on 01/11/2018 03:19 amSeems like India will have a fine engine for an RLV. Just cluster seven SC-200s like Blue Origin is doing with their BE-4 for the first stage.They have been toying with a design having a cluster of 5 engines for the first stage. Not sure if they can use the central engine for propulsive recovery in that configuration though. I'm guessing the engine would need to be capable of burning at a much lower than nominal thrust for that to work out.Maybe hoverslam can compensate for throttleability?
Quote from: sanman on 06/15/2017 02:49 pmQuote from: K210 on 06/15/2017 12:32 pmQuote from: russianhalo117 on 06/14/2017 02:34 pmCurrent version in development is designed to be expendable with follow-on version designed to support reuse.Actually SCE-200 is being developed with reusability in mind. Each engine can be reused up to 15 times. I know the semi-cryo engine intended for use in the planned TSTO (Two-Stage-To-Orbit) vehicle is supposed to be reusable as you've said, however it's not clear to me whether that engine is the same as the SCE-200, which is meant for replacing the GSLV-Mk3's L110 stage (UDMH/N2O4).Logically, it might be practical for ISRO to first get SCE-200 non-reusably flying on GSLV-Mk3, which is an expendable launch vehicle, even while it works to achieve reusability on its semi-cryo engine meant for TSTO.All liquid fuel rocket engines are reusable to a certain extent. The CE-20 that was recently flown on MK-3 was fired 2-3 times before it was flight tested.
Quote from: K210 on 06/15/2017 12:32 pmQuote from: russianhalo117 on 06/14/2017 02:34 pmCurrent version in development is designed to be expendable with follow-on version designed to support reuse.Actually SCE-200 is being developed with reusability in mind. Each engine can be reused up to 15 times. I know the semi-cryo engine intended for use in the planned TSTO (Two-Stage-To-Orbit) vehicle is supposed to be reusable as you've said, however it's not clear to me whether that engine is the same as the SCE-200, which is meant for replacing the GSLV-Mk3's L110 stage (UDMH/N2O4).Logically, it might be practical for ISRO to first get SCE-200 non-reusably flying on GSLV-Mk3, which is an expendable launch vehicle, even while it works to achieve reusability on its semi-cryo engine meant for TSTO.
Quote from: russianhalo117 on 06/14/2017 02:34 pmCurrent version in development is designed to be expendable with follow-on version designed to support reuse.Actually SCE-200 is being developed with reusability in mind. Each engine can be reused up to 15 times.
Current version in development is designed to be expendable with follow-on version designed to support reuse.
Some very rough math shows a 5 x SCE-200 + 2 x CE-20 can do ~30-33t to LEO while 7 x SCE-200 + 2-3 x CE-20 can do 40-45t. With a 33-50% penalty for first stage recovery, you're looking at a ~15-22t or ~20-30t semi-reusable launcher. If CE-20s aren't too expensive, then 3 on the 7-engine booster would push its second stage comfortably above Centaur-class T/W levels, and at 66% remaining thrust, give the stage a fighting chance at completing the mission in the event of a single-engine failure.
They may go VTOHL. Already proved they can do HL. HL doesn't scale like VL but it is easier to get right first time and that is important R&D cost saving. If VTOHL booster can deliver 4t GTO or 10t LEO, that is most of commercial market. For bigger LV use two fly back boosters with expendable core.
Are you sure of your maths, SCE200 is about same as Merlin and F9 is about 20t to LEO.
“After a presentation before the Space Commission, Isro has got the approval for developing the semi-cryogenic rocket stage. The deadline to develop this stage is 29 months. Once the stage is ready, the carrying capability of GSLV Mk III will increase from the existing four tonnes to five tonnes.”
Isro gets nod for semi-cryogenic engine, will boost GSLV’s lift capability by 1 tonne.Quote“After a presentation before the Space Commission, Isro has got the approval for developing the semi-cryogenic rocket stage. The deadline to develop this stage is 29 months. Once the stage is ready, the carrying capability of GSLV Mk III will increase from the existing four tonnes to five tonnes.”I thought after replacing L110 stage with SCE-200 stage MK3 launch vehicle performance would increase like in the range of around 2000kg.But according above news article they are saying about only 1000kg improvement is this is directly from ISRO are reporter made it out of his own thinking..Isro chairman K Sivan said nothing about exact amount of payload improvement....
Is it SCE-200 engine manufacturing came near to completion by Godrej Industries or still individual component testing is going on at Ukraine facilities....and what about Mahendragiri test facilities status...anybody have any insider information...
The Indian Space Research Organisation (ISRO) has progressed to the testing of subsystems in the development of a semi-cryogenic engine for rockets with heavier payload capacity.The testing facilities at the ISRO Propulsion Complex, Mahendragiri, are being augmented for the engine being developed by the Liquid Propulsion Systems Centre here under a project codenamed SCE 200. Three of the four turbo pumps of the new engine have been tested and the pre-burner and thrust chamber are being readied for testing, LPSC Director S. Somanath told The Hindu.
ISRO scientists have simultaneously begun work on the stage configuration. "We hope to complete the development of the engine by 2019. The stage test is expected to take place by 2020, followed by the first flight test in 2021," he said.
2 X SCE-200 (Clustered) --> SC400 Stage