Author Topic: LVM-3 (ex-GSLV-Mk III) - General Discussion  (Read 126933 times)

Offline vyoma

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #60 on: 10/03/2015 03:53 pm »
http://economictimes.indiatimes.com/news/science/gslv-mark-iii-rocket-modified-ground-tests-done-isro/articleshow/49208700.cms

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CHENNAI: Based on last year's GSLV Mark III's experimental flight, modifications have been done to solid rocket S-200 motors to change dynamic pressure and forces and ground tests have been done, a top ISRO official said today.

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Sharing the developments over GSLV Mark III with reporters on the sidelines of Hindustan University's convocation here, the top official said "those changes have also been incorporated and ground tests have been conducted on those modified rockets and so, that way we are quite on track for GSLV Mark III (launch)next year."

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Stating that ISRO was planning to launch GSLV Mk-III by December next year, he said,"for GSLV Mark III launch the target is December 2016 and a second launch December 2017."

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On the Mark III cryogenic engine development, it has been going on "very successfully," and ISRO has done "more than 21 different tests including long duration test," he said.

"Actually in the launch, it is supposed to work for about 635 seconds to put the satellites in orbit, now we have tested the engine for not only that period but also for an extended period for about 800 seconds." These tests have been done on one engine and "now we need to repeat it on another hardware and those activities are in progress," he said.

An important aspect about cryogenic engine is that it is totally indigenous development, he said.

"The various tests that we have gone through so far is simulated prior to test and tests have validated, giving us great confidence that the entire technology in terms of basics the engineers and scientists have understood the mechanism."

Offline antriksh

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #61 on: 10/03/2015 04:06 pm »
Payload fairing and solid strapon motors' nose cones look different in above two pictures.

yes, so LVM3 is still evolving. The HS in the former pic looks more like the HLVs HS

« Last Edit: 10/03/2015 04:10 pm by antriksh »
Nasadiya Sukta:
Srishti se pehle sat nahin thaa, asat bhi nahin | Antariksh bhi nahin, aakaash bhi nahin thaa | chhipaa thaa kyaa, kahaan, kisne dhakaa thaa | us pal to agam, atal jal bhi kahaan thaa ||

From: 1st verse of 129th Hymn of the 10th Book of Rig Veda

Offline vineethgk

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #62 on: 10/03/2015 05:09 pm »
Payload fairing and solid strapon motors' nose cones look different in above two pictures.

yes, so LVM3 is still evolving. The HS in the former pic looks more like the HLVs HS



Keen eyes vyoma !!

And if my eyes do not deceive me, the strapon nose section looks more like that of Ariane 5 now.

Edit: Any idea if the pic in Ohsin's post is the new design for LVM3 ?
« Last Edit: 10/03/2015 05:20 pm by vineethgk »

Offline Ohsin

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #63 on: 10/04/2015 12:50 am »
Those images are from pasteboard of NAL if it wasn't clear. No additional info. And that HLV render has been taken off VSSC site after recent update but still accessible through direct link.
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Offline Ohsin

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #64 on: 10/04/2015 02:08 am »
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“We are  progressing steadily. The engine was tested successfully in July. The next stage of the development is the integration of all the systems that make up the whole  cryogenic stage. The fully integrated stage will be ground tested within six  months,

IPRC will test the stage as a whole on the ground for up to 25 times the duration for which a mission will require it fired. The next step will see the stage tested at  Sriharikota with complete autonomy of systems. “Once that is done, the project can be taken forward. We actually hope to have the Mark III developed by next year. However, that is only a target, not a prediction,” said the official. The initial version of the GSLV Mk III, however, is likely to have a payload capability of 3,500 kg, with the systems being optimised in a staggered manner.

http://www.newindianexpress.com/states/tamil_nadu/GSLV-Mark-IIIs-Cryogenic-Stage-to-be-Ground-Tested-in-6-Months/2015/10/04/article3061500.ece
"Well, three cheers to Sharma, but our real baby is INSAT."

Offline Ohsin

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #65 on: 12/29/2015 05:49 am »
Year End Review: Achievements of Department of Space during the year 2015

http://pib.nic.in/newsite/PrintRelease.aspx?relid=133949

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3.  Development of Next Generation Geo-Synchronous Satellite Launch Vehicle Mk III:

 ​The first experimental flight of heavy lift next generation launch vehicle, GSLV-Mk III, was successfully conducted on December 18, 2014 from Sriharikota. This flight has validated the complex atmospheric regime of flight and demonstrated the Integrity of design of GSLV Mk III.

​During the experimental flight of GSLV Mk III, the unmanned Crew module Atmospheric Re-entry Experiment (CARE) has also been successfully tested for its re-entry performance. Crew module splashed down over Andaman Sea with the help of its parachutes and was recovered from the sea with the help of Indian Coast Guard as per the mission plan.

Endurance hot test of High Thrust cryogenic engine (CE20) of GSLV-Mk III was successfully conducted on July 20, 2015.  The test was conducted for 800 seconds as compared to its nominal burn duration of 635 seconds during flight. This engine will be used for powering the Cryogenic stage (C25) of GSLV Mk-III launch vehicle. Another short duration (5.7 s) hot test on the CE20 engine has been carried out on Aug 10, 2015 to demonstrate the successful engine ignition with tank pressure conditions as in flight.

GSLV Mk III is designed to launch 3.5 to 4 Ton class communication satellites to Geosynchronous Transfer Orbit.

The missing piece ;D They conducted high altitude tests soon after that 800s endurance burn.

Edit:

Quote from:
Edit: Any idea if the pic in Ohsin's post is the new design for LVM3 ?

Yes in the recently released book there is  a mention of some design changes related to strapons and Payload fairing(would be ogive).
« Last Edit: 12/29/2015 06:05 am by Ohsin »
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Offline vyoma

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #66 on: 01/25/2016 09:09 am »
http://www.thehindu.com/todays-paper/tp-national/tp-tamilnadu/cryogenic-engine-may-be-used-for-gslv-mkiii-by-yearend/article8149770.ece

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The high-thrust cryogenic engine (CE20), which was successfully test fired at the ISRO Propulsion Complex (IPRC), Mahendragiri, for launching three-tonne class payloads, would be used on GSLV Mk-III flight by the end of this year, a senior IPRC scientist has said.

A long duration hot test has proved that all sub-systems of the engine performed well and after completing a series of development tests on this indigenously developed engine, it would be ready for flight by the end of this year, the scientist told The Hindu here on Sunday.

Offline worldtimedate

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #67 on: 01/25/2016 09:44 pm »
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The high-thrust cryogenic engine (CE20), which was successfully test fired at the ISRO Propulsion Complex (IPRC), Mahendragiri, for launching three-tonne class payloads, would be used on GSLV Mk-III flight by the end of this year, a senior IPRC scientist has said.

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Though the engine was designed to carry three-tonne class satellites, the payload weight would be restricted to less than three tonnes in the initial developmental flight, he said.

Source : Cryogenic engine may be used for GSLV Mk-III by year-end

Isn't the GSLV MK-III is supposed to loft a 4 ton Satellite to GTO with a powerful CE20 Engine ? I would like to stand corrected if I am wrong. Is it a misreporting or is the cryogenic engine's capacity lower than initially designed ? CE20 Engine Thrust is supposed to be 200 kN. Initial reports said that in the first development test, a 3.5-ton satellite would be launched. If this recent report is true, this is a setback for GSLV MK-III payload capacity. After developing this Launcher for more than a decade, how can ISRO come up with Launcher that can loft only 3 ton Satellite to GTO ? I hope, this is a misreporting.

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« Last Edit: 01/25/2016 09:48 pm by worldtimedate »

Offline Steven Pietrobon

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #68 on: 01/26/2016 03:12 am »
I like to new name of the kerosene ISRO is going to use. :-)

"The semi-cryogenic engine, using kerosene as fuel and liquid oxygen as oxidiser, is currently being designed and developed. The refined and purified kerosene to be used as fuel has been named as ‘isrosene’, the scientist said."
« Last Edit: 01/26/2016 03:13 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Ohsin

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #69 on: 02/11/2016 03:39 pm »
CE20+C25 testing soon ?! And with reentry test is he hinting at SRE2 or another crew module test?

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According to reports, Sivan said the GSLV will be Stage-tested in two months and go for launching in December. He also said the electric propulsion will be used in the satellites for the first time in India. He further said ISRO will also undertake tests to bring back humans safe to earth in case if sent to space and the moon.

https://in.news.yahoo.com/isro-launch-cryogenic-mk-iii-based-gslv-vehicle-132944000.html
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Offline Ohsin

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #70 on: 02/19/2016 02:45 pm »
CE-20 successfully hot tested for flight duration with Mixture Ratio Controller (MRC) in closed loop mode!  ;D

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The test was completed successfully at ISRO Propulsion Complex (IPRC) at Mahendragiri today at 17.15 hrs, an ISRO press release said here.

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The engine has already undergone two short duration tests and demonstrated repeatability of engine ignition characteristics and steady state performance

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The test was conducted with Mixture Ratio Controller (MRC) in closed loop mode for the flight duration of 640 seconds, according to ISRO.

http://www.business-standard.com/article/pti-stories/isro-successfully-conducts-hot-test-of-cryo-ce-20-engine-116021900959_1.html

Wondering if it is old news getting picked up again by media somehow. TheHindu is also reporting it

http://www.thehindubusinessline.com/news/science/isro-successfully-conducts-hot-test-of-cryo-ce-20-engine/article8258080.ece

Previous tests were of 635s and 800s and some short duration 5.7s high altitude tests..

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Apr 28, 2015
Successful long duration hot test (635 seconds) of high thrust cryogenic engine (CE20)
http://www.isro.gov.in/successful-testing-of-high-thrust-cryogenic-engine

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Jul 20, 2015
Indigenously Developed High Thrust Cryogenic Rocket Engine Successfully Ground Tested for a duration for 800 seconds

http://www.isro.gov.in/update/20-jul-2015/indigenously-developed-high-thrust-cryogenic-rocket-engine-successfully-ground

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Another short duration (5.7 s) hot test on the CE20 engine has been carried out on Aug 10, 2015 to demonstrate the successful engine ignition with tank pressure conditions as in flight.

http://pib.nic.in/newsite/PrintRelease.aspx?relid=133949

Edit: Verified! Image attached has today's date

Source
« Last Edit: 02/19/2016 03:48 pm by Ohsin »
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Offline sanman

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Offline worldtimedate

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #72 on: 02/20/2016 02:04 am »
Here is another report from Today's Hindu Newspaper regarding the CE20 Engine Test. I think ISRO is very confident now of doing the Cryogenic Upper Stage Test very soon, because ISRO chairman says the preparation is underway for LVM3 first development test in December,

Source : ISRO upbeat as indigenous cryo engine passes test

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Indian Space Research Organisation’s (ISRO) bid to acquire the capability to launch heavier satellites into orbit received a boost on Friday with the successful hotbed test of the cryogenic engine for the upper stage of the GSLV Mark 3 rocket.

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The long-duration test at the ISRO Propulsion Research Centre at Mahendragiri lasted 640 seconds.

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Developed at the Liquid Propulsion System centre (LPSC) here, the engine had already undergone two short-duration tests for engine ignition and steady state performance.

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Earlier in the day, Mr. Kumar said preparations were under way for the first developmental flight of the GSLV Mark 3 in December 2016.

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The biggest rocket made in India, the Mk3 will be capable of launching four-tonne satellites into geosynchronous orbit.

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Offline Ohsin

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #73 on: 02/20/2016 03:32 am »
Might see another one soon. Then hopefully in two months integrated tests with C25 stage.

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This is the second cryo engine on which the hot tests are being conducted. A third engine identified for actual flight use will soon undergo tests at Mahendragiri soon.

Source 1

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Kiran Kumar noted that they have so far conducted a series of 42 tests starting from the first, which lasted just 30 seconds.

Source 2

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    “It gives us the confidence to go ahead [with its other activities] and more or less confirm a full launch of GSLV MkIII in December.” Tested once in mid-2015 for 800 seconds, the engine prototype, he said, has proven that it can repeat the performance equally on a second or different hardware. Its design would be frozen, replicated for use in the cryogenic third stage of upcoming MkIII rockets. When it gets regularised in the coming years, the GSLV-MkIII launcher (some call it the LVM3) will be able to lift four-tonne communication satellites into their specified orbit.

Stage test next

    Calling it “100 per cent success,” S. Sivan, Director of the rocket-related hub, Vikram Sarabhai Space Centre, Thiruvananthapuram, said, “There is confidence that we are going in the right direction” with the cryoengine design. In a couple of months, they would test the entire cryogenic third stage, called C-25, with fuel tank, plumbing and other systems.

Source 3
« Last Edit: 02/20/2016 04:14 am by Ohsin »
"Well, three cheers to Sharma, but our real baby is INSAT."

Offline vineethgk

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #74 on: 02/20/2016 08:10 am »
I guess the hard time they had with CE-7.5 paid of well. After their ordeal with its staged combustion cycle design, this gas generator design might have been a breeze.. By the way, would a few months be enough to integrate the engine with the stage and do necessary tests? I am pleasantly surprised that ISRO is sticking to its December target for LVM3-D1.

Offline worldtimedate

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #75 on: 02/20/2016 07:51 pm »
India can launch 4-tonne satellite

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Director of Vikram Sarabhai Space Centre, Dr K. Sivan, said on Thursday that engine level tests for the GSLV Mark 3 rocket were complete and stage level tests would be conducted in two-three months.

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The rocket will be ready for launch by December this year. The GSLV Mark 3 will be capable of carrying a payload of four tonnes and will be used in manned space missions by ISRO. The earlier versions could carry only 2.2 tonnes.

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Offline Ohsin

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #76 on: 02/25/2016 01:04 pm »
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Feb 24, 2016

CE 20 Engine of GSLV MKIII successfully hot tested

CE 20 Engine of GSLV MKIII under Hot Test

ISRO has crossed a major milestone in the development of CE-20 engine for the GSLV MKIII vehicle by the successful hot test for 640 seconds duration on 19.02.2016 at ISRO Propulsion Complex, Mahendragiri. Chairman, ISRO has witnessed the hot test. The test has demonstrated the repeatability of the engine performance with all its sub systems like thrust chamber, gas generator, turbo pumps and control components for the full duration. All the engine parameters were closely matching with the pre test prediction.

http://www.isro.gov.in/update/24-feb-2016/ce-20-engine-of-gslv-mkiii-successfully-hot-tested
"Well, three cheers to Sharma, but our real baby is INSAT."

Offline antriksh

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #77 on: 02/29/2016 11:28 am »
Nasadiya Sukta:
Srishti se pehle sat nahin thaa, asat bhi nahin | Antariksh bhi nahin, aakaash bhi nahin thaa | chhipaa thaa kyaa, kahaan, kisne dhakaa thaa | us pal to agam, atal jal bhi kahaan thaa ||

From: 1st verse of 129th Hymn of the 10th Book of Rig Veda

Offline sanman

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #78 on: 02/29/2016 03:25 pm »
CE-20 Hot-Tested




Offline Ohsin

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Re: LVM-3 (ex-GSLV-Mk III) - General Discussion
« Reply #79 on: 05/25/2016 06:25 pm »
C25 status: Loading

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He said the first developmental flight of India's heaviest rocket geosynchronous satellite launch vehicle-Mark III (GSLV-MkIII) will be in December 2016 carrying the GSAT-19 satellite.

Sivan said the second developmental flight of GSLV-MkIII is slated for December 2017.

"The time gap is mainly to study the data generated from the first flight and also to develop the necessary hardware. Once the two developmental flights are successful then the rocket will be termed fit for commercial flights," Sivan said.

<snip>

"Soon the cryogenic stage -- engine, fuel and other systems -- will be tested. Then the stage will be tested in vacuum conditions and there will also be a high altitude test," Sivan said

Source
"Well, three cheers to Sharma, but our real baby is INSAT."

Tags: GSLV Mk3 LVM3 
 

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