Author Topic: GSLV-Mk III - General Discussion  (Read 49658 times)

Offline dhiraj

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Re: LVM3 - General Discussion
« Reply #40 on: 05/10/2015 06:41 AM »

Antisksh, where did you got that info? I don't see the programmatic requirement for such a beast in the future, and it sort of goes against the ULV concept, while ignoring any reusability chances. Is ISRO planning on doing 6+ tonne GTO birds? Or are they needing 20tonnes to LEO?

HLV to me is a recent development (2014 onwards). the attached article in this post http://forum.nasaspaceflight.com/index.php?topic=36389.msg1371968#msg1371968 mentions that ISRO is conducting studies on HLV.

The source of HLV imgae is http://www.vssc.gov.in/VSSC_V4/index.php/technology/heavy-lift-launch-vehicles.

About 10 ton satellites, in the words of DR K Sivan :

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He said, the next focus after the Mars mission was towards exploration of the solar system and deep space astronomy. As new applications are  being developed, the size of satellites had to be increased and ISRO was planning to develop 10 tons satellites soon.

Source


is there any info regarding the semi cryo engine and stage test ? i believe C 25 and Semi cryo development started around the same time but some how semi cryo seems delayed.

Offline vyoma

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Re: LVM3 - General Discussion
« Reply #41 on: 05/10/2015 11:04 AM »

is there any info regarding the semi cryo engine and stage test ? i believe C 25 and Semi cryo development started around the same time but some how semi cryo seems delayed.

You can find info about SCE-200 semi cryogenic engine in this thread: http://forum.nasaspaceflight.com/index.php?topic=32477.0

Offline vineethgk

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Re: LVM3 - General Discussion
« Reply #42 on: 05/11/2015 06:37 AM »
IMHO, CLCs as boosters is always an option provided there is a requirement. For CLC diameter, my guess is it would be same as that of heat shield, 5m.
Hmmm.. The Chinese seems to have had a lot of trouble in manufacturing their 5m dia cores for Long March 5.  ???

Offline vyoma

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Re: LVM3 - General Discussion
« Reply #43 on: 05/30/2015 03:47 PM »
http://www.thehindu.com/news/cities/Thiruvananthapuram/isro-developing-heavy-lift-launch-vehicles/article7262881.ece

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. “While the GSLV Mk3, scheduled to undergo operation flight test in December 2016, will be capable of carrying satellites up to four tonnes, the standard size of satellites is expected to go up to six tonnes in the near future, requiring rockets with more heft,” he explained.

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ISRO is toying with the idea of adding a semi-cryogenic stage to the GSLV Mk3 to generate a lift up to six tonnes. A more powerful cryo upper stage is expected to add the required muscle to handle satellites up to 10 tonnes. “What we have in mind is a progressive development to come up with need-based variants of the Mk3 instead of coming up with a new rocket altogether,” Mr. Dathan said.

Offline TrevorMonty

Re: LVM3 - General Discussion
« Reply #44 on: 05/30/2015 09:03 PM »
The LVM3 may benefit from latest Proton failure. Customers will be looking for alternative LV and maybe willing to take a risk with LVM3. ISRO have a good launch record with PSLV, 25 successful launches in a row.

Offline Ohsin

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Re: LVM3 - General Discussion
« Reply #45 on: 05/31/2015 03:11 AM »
http://www.newindianexpress.com/states/kerala/Technical-Anomaly-Puts-Off-ISROs-Key-CE-20-Test/2015/05/31/article2841451.ece

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“The test was not completed as planned. We had to call it off 30 seconds into the test. But we have identified the hitch as a mere measurement anomaly,” said Dr K Sivan, outgoing director of ISRO’s Liquid Propulsion Systems Centre (LPSC), and new chief of the Vikram Sarabhai Space Centre (VSSC). The test will be conducted again in two to three weeks, he said
"Well, three cheers to Sharma, but our real baby is INSAT."

Offline johnxx9

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Re: LVM3 - General Discussion
« Reply #46 on: 05/31/2015 07:15 PM »
The LVM3 may benefit from latest Proton failure. Customers will be looking for alternative LV and maybe willing to take a risk with LVM3. ISRO have a good launch record with PSLV, 25 successful launches in a row.

As of now/near future, ISRO does/will not have the capacity to use LVM3 or GSLV Mk 2 for commercial launches. The Achilles heel is the manufacture of the cryogenic stages. Currently, ISRO can only produce 2-3 of them a year. The situation will improve when HAL's cryo engine fabrication facility starts functioning. But that still a good 3-5 years away.

Offline vyoma

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Re: LVM3 - General Discussion
« Reply #47 on: 06/05/2015 03:52 AM »
http://economictimes.indiatimes.com/news/science/new-project-director-for-gslv-mark-iii-programme/articleshow/47544866.cms

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THIRUVANANTHAPURAM: Senior ISRO scientist G Ayyappan today took charge as the Project Director of the prestigious GSLV Mark III programme under development at the Vikram Sarabhai Space Centre (VSSC) here.

The programme is aimed at making the country self-reliant by developing rockets capable of launching heavier communication satellites of INSAT-4 class, which weigh 4,500 to 5,000 kg.

A graduate in Mechanical Engineering from the College of Engineering in Trivandrum and M Tech from IIT in Madras, he served ISRO in different capacities since 1982, an official release said.

He was the Vehicle Director of LVM3-X/CARE mission, the first experimental flight of the Geosynchronous Satellite Launch Vehicle (GSLV) Mark III carried out in December last year, it said.

He was the Associate Project Director of GSLV Mk III prior to this post, it said.

Offline Ohsin

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Re: LVM3 - General Discussion
« Reply #48 on: 06/17/2015 10:37 PM »
http://www.sakshi.com/news/andhra-pradesh/successfully-testing-a-geostationary-248632

Anyone who knows Telugu. Is the above article about successful testing of S-200 booster after some changes?
"Well, three cheers to Sharma, but our real baby is INSAT."

Online sanman

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Re: LVM3 - General Discussion
« Reply #49 on: 06/17/2015 10:57 PM »
I don't speak Telugu, but maybe Google Translate can help?

https://translate.google.com/translate?sl=te&tl=en&js=y&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fwww.sakshi.com%2Fnews%2Fandhra-pradesh%2Fsuccessfully-testing-a-geostationary-248632&edit-text=&act=url

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Successfully testing a geostationary
Sakshi | Updated: July 15, 2015 0038 (IST)
Sriharikota (sullurupeta): Indian Space Research (ISRO) will in the future in view of the large experiments using technology more in the S -200 strapan booster rocket Sriharikota at 9.30 am on Sunday morning in the center of the Earth static tests to be carried out successfully. On December 18 last year to carry out the experiment jieselvi Mark -3, -200 S booster strapan ability to carry out tests to determine the geostationary won twice.

S -200 in the experiment, the scientists found that high pressure boosters. The scientists believe that the future will be in danger, pressure to reduce the size of this series of tests was carried out successfully. In 2016 jieselvi mark3-D-1, said the scientists conducted an experiment of this type boosters. 200 tons of solid fuel filling, the tests were conducted to determine its effectiveness.

To ningiloki satellites in the future, about 3 to 5 tons -200 S strapan, such as the need for boosters. S -200 success in tests since bhariprayogalaku tirugundadani say in the future. Pikunhikrsnan Shore program director, associate director, Dr. SV Subba Rao, Director jieselvi Ayyappan, Director Eeswaran S -200 involved in the project.

"jieselvi" seems to be a phonetic equivalent to "GSLV"


Edit by mod:
Another translation trial:
Quote
Successful geostationnary test
Sakshi | Updated: June 15, 2015  00:38 (IST)

Sriharikota (Sullurupeta): The Indian Space Research Organization (ISRO) has successfully conducted the ground fixed tests at the Sriharikota rocket center at 9.30 am on Sunday using more technology in the S-200 strap-on booster for future heavy launches. On December 18,  conducted the GSLV Mark-3 launch and two-stage geometry tests were conducted to gain the S-200 strap-on booster efficiency.

Scientists have discovered that during the launch pressure was high in the S-200 booster. Scientists, who felt that the future would be at risk, have successfully conducted these tests to reduce pressure. Scientists said that the GSLV Mark3-D1 launch will be conducted in 2016 with this type of boosters. These tests were conducted to fill 200 tons of solid fuel and to know its potential.

In the future, we need to use strap-on boosters like the S -200 to send a load of 3 to 5 tonnes of satellites in the future. The S-200 tests are a success and are not going to take place in future. The program was attended by Shr D. P. Kunjikrishnan, Associate Director Dr SV Subba Rao, GSLV Director, Ayyappan, S-200 Project Director Eshwaran.
« Last Edit: 06/09/2017 08:45 AM by input~2 »

Offline antriksh

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Re: LVM3 - General Discussion
« Reply #50 on: 06/23/2015 02:49 PM »
Static test of S200 motor successful

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The static test of S200 motor with 205 tonnes of HTPB-based propellant was successfully carried out

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to bring down the dynamic pressure during transonic regime, a modified Head End Segment (HES) grain geometry has been designed and realised.
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: LVM3 - General Discussion
« Reply #51 on: 06/28/2015 06:33 PM »
Static test of S200 motor successful

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The static test of S200 motor with 205 tonnes of HTPB-based propellant was successfully carried out

Quote
to bring down the dynamic pressure during transonic regime, a modified Head End Segment (HES) grain geometry has been designed and realised.

So they have apparently reduced the propellant load from 207 tonnes for the new grain geometry? Or is this change usual for static tests?

Offline vyoma

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Re: LVM3 - General Discussion
« Reply #52 on: 07/17/2015 01:28 AM »
http://thehindu.com/news/national/tamil-nadu/gslv-mk-iii-engine-completes-full-endurance-test/article7432042.ece

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The Indian Space Research Organisation (ISRO) successfully conducted the much-awaited ‘full endurance test’ of the Geosynchronous Satellite Launch Vehicle Mk III’s indigenous cryogenic CE-20 engine at ISRO Propulsion Complex (IPRC) in Mahendragiri in the district on Thursday.

The CE-20 was ignited and tested for 800 seconds from 5 p.m. to study the performance of the engine though the actual required duration was only 635 seconds.

During the actual flight of the GSLV, the engine will be ignited for only 635 seconds.

Quote
He said that the subsystems of CE-20 such as injector, thrust chamber, gas generator, liquid oxygen and liquid hydrogen turbo pumps were tested at the IPRC,

Offline abhishek

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Re: LVM3 - General Discussion
« Reply #53 on: 07/20/2015 12:03 PM »
ISRO PRESS RELEASE

Indigenously Developed High Thrust Cryogenic Rocket Engine Successfully Ground Tested for a duration for 800 seconds

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India’s first indigenously designed and developed High Thrust cryogenic rocket engine generating a nominal thrust of 19 tonnes was successfully endurance hot tested for a duration of 800 seconds on July 16, 2015 at ISRO Propulsion Complex, Mahendragiri. This duration is approximately 25% more than the engine burn duration in flight. The engine will be used for powering the Cryogenic stage (C25), the upper stage of the next generation GSLV Mk-III launch vehicle of ISRO, capable of launching four tonne class satellites.

This cryogenic engine of C25 Stage operates on Gas Generator Cycle using extremely low temperature propellants – Liquid Hydrogen (LH2) at 20 Kelvin (-253 deg C) and Liquid Oxygen (LOX) at 80K (-193 deg C). The various subsystems of the engine are – regeneratively cooled Thrust Chamber, Gas Generator, LOX and LH2 high speed turbopump systems, flow control components, close loop mixture ratio control system, Pyrogen igniters, fluid systems, etc. The turbopump system rotates at a speed of 36,000 rpm with a power level of 2 MW.
http://www.isro.gov.in/update/20-jul-2015/indigenously-developed-high-thrust-cryogenic-rocket-engine-successfully-ground#sthash.E139JXPE.dpuf
« Last Edit: 07/20/2015 12:04 PM by abhishek »
10, 9, ignition sequence start 6, 5, 4, 3, 2, 1, 0, all engines running Lift off, we have a lift off, lift off

Offline vyoma

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Re: LVM3 - General Discussion
« Reply #54 on: 07/20/2015 04:48 PM »
Super! Hoping to see CE20 engine integrated with C25 stage soon :)

Offline worldtimedate

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Re: LVM3 - General Discussion
« Reply #55 on: 08/04/2015 07:32 AM »
Quote

Isro, meanwhile, has put to long-duration test its indigenously developed cryogenic engine for GSLV-Mark-III, which can carry satellites weighing up to four tonnes. "We will launch it by December 2016," Kumar said. India's big missions including the proposed manned mission rests on the shoulders of GSLV-MIII.


Quote
Isro is also on the lookout for a launch pad outside Sriharikota, in Kulasekharapattinam in southern Tamil Nadu.


Source :
Isro to put US satellite in space for the first time

« Last Edit: 09/28/2015 12:51 PM by Chris Bergin »

Offline abhishek

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Re: LVM3 - General Discussion
« Reply #56 on: 08/06/2015 04:09 AM »
Government allocated Rs 470 cr for GSLV Mk III launch

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An amount of Rs 470 crore has been allocated for the development of GSLV Mk III launch vehicle in the Twelfth Five Year Plan, said a senior Union Minister today.

India's first indigenously designed and developed high thrust cryogenic engine meant for next generation GSLV Mk-III launch vehicle is under advanced stage of development. The engine will be used for powering the India's heaviest rocket under development-geosynchronous satellite launch vehicle (GSLV) Mk-III with a capacity to put into orbit satellites weighing four tonnes.

http://www.business-standard.com/article/current-affairs/government-allocated-rs-470-cr-for-gslv-mk-iii-launch-115080501628_1.html
10, 9, ignition sequence start 6, 5, 4, 3, 2, 1, 0, all engines running Lift off, we have a lift off, lift off

Offline Ohsin

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Re: LVM3 - General Discussion
« Reply #57 on: 09/26/2015 05:35 PM »
Nose job for a VIP visit.
"Well, three cheers to Sharma, but our real baby is INSAT."

Offline antriksh

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Re: LVM3 - General Discussion
« Reply #58 on: 10/03/2015 03:35 PM »
testing testing

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 vyoma

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Re: LVM3 - General Discussion
« Reply #59 on: 10/03/2015 03:46 PM »
Payload fairing and solid strapon motors' nose cones look different in above two pictures.

Tags: GSLV Mk3 LVM3