Indian Space Programme Discussion

member_23370 · Post by **member_23370** » 23 May 2016 06:39

Nice..Hope they put up the video soon.

member_28108 · Post by **member_28108** » 23 May 2016 06:42

News channels say mission accomplished.

SriKumar · Post by **SriKumar** » 23 May 2016 06:42

rahulm wrote:Dr Sivan was on a roll and about to reveal something interesting about the special zig-zag pattern on the black coloured tiles when Pallav cut him off. Journalists should know when its time to listen and when its time to talk.

I agree he was cut off here. BTW, these tiles are silica tiles (in the same interview) and look very similar to what was used in SRE-1. It seemed like the under-side had them too. He pointed out the location of the reaction thrusters but the camera man did not zoom in to the right place on the vehicle.

Prem · Post by **Prem** » 23 May 2016 06:43

Bring the Video ASAP !!

member_28108 · Post by **member_28108** » 23 May 2016 06:43

Seeing the secrecy and limited coverage there seems to be a lot of technology that they did not want to show !!

member_28108 · Post by **member_28108** » 23 May 2016 06:44

The video released is only of the ascent phase. The launch is not being shown.

rahulm · Post by **rahulm** » 23 May 2016 06:51

NDTV report with video Video appears to be from outside SHAR premises. Maybe journalists were not allowed.

Hindu http://www.thehindu.com/sci-tech/scienc ... epage=true

member_28397 · Post by **member_28397** » 23 May 2016 06:59

hyper-sonic glider with limited maneuverability, doesn't seems like a science mission, more like a futuristic strategic weapon system.

abhijitm · Post by **abhijitm** » 23 May 2016 07:12

ISRO spokeperson on DD News saying the descent was of pin point accuracy and the mission is successful.

Congratulatiom ISRO!!

ldev · Post by **ldev** » 23 May 2016 07:19

MaharathiArjun wrote:hyper-sonic glider with limited maneuverability, doesn't seems like a science mission, more like a futuristic strategic weapon system.

Precisely, it can be many things for many reasons, weapons deployment, satellite retrieval etc.....but one thing it is not is cheapest per/kg to orbit.

abhijitm · Post by **abhijitm** » 23 May 2016 07:34

^^ ISRO is saying 80% of the launch cost goes into deployment and navigation. 20% to fuel. RLV will save almost 80% cost of each launch.

Prem · Post by **Prem** » 23 May 2016 07:37

Good if it can capture LEO enemy satellite passing over Indian space space or change their orientation with little nudge .

member_29172 · Post by **member_29172** » 23 May 2016 07:48

Wish this was kept a secret for atleast a decade. Never reveal latest tech. Either way, congrats to the RLV-TD team. This would go a long way in building a moon base. Something I feel is urgently needed. Along with a bigger version that can accomodate Vyomanauts obviously.

rahulm · Post by **rahulm** » 23 May 2016 07:52

For a long time, ISRO has live telecast every PSLV and GSLV launch and any successes failures have been very public.

It has concealed nothing not even the vitals. They were happy to show the RLV-TD in interviews but have hidden the launch behind the burqha. Now they want to conceal the vitals and everything else.Very curious.

To test military stuff we always have DRDO which can by design be behind several burqhas

SwamyG · Post by **SwamyG** » 23 May 2016 07:52

Congratulations, I did not want to say 'good luck' yesterday.

juvva · Post by **juvva** » 23 May 2016 07:55

Not a word on any of the ISRO websites....main site, facebook etc. Looks like they want to keep the details, close to the chest.

kit · Post by **kit** » 23 May 2016 08:14

great ..now let's have an "experimental " satellite recovery from space ..

sooraj · Post by **sooraj** » 23 May 2016 08:41

shiv · Post by **shiv** » 23 May 2016 08:44

member_23370 · Post by **member_23370** » 23 May 2016 08:47

Hmm thats before assembly. I hope some good pics are released.

rahulm · Post by **rahulm** » 23 May 2016 08:49

That's probably a pic of the launch config being assembled on the FLP.

deejay · Post by **deejay** » 23 May 2016 09:12

This is Big Boys stuff. Congratulations ISRO. Thank You to all gurus for your posts, analysis and discussions from uninformed enthusiasts like me.

member_29172 · Post by **member_29172** » 23 May 2016 09:25

kit wrote:great ..now let's have an "experimental " satellite recovery from space ..

Yes, a satellite recovery is long overdue

rahulm · Post by **rahulm** » 23 May 2016 09:31

I don't think the RLV TD performed any return manoeuvres today. I think the entire flight was a straight line (don't confuse with ballistic launch trajectory) away from SHAR. It should have travelled a ground (sea) distance of 500 kms from the launch point to its splash down point.

From memory, I think the final operational RLV will perform a 2G return manoeuvre turn at 10km altitude - but this needs to be verified.

nirav · Post by **nirav** » 23 May 2016 09:35

Its been reported that the descent had pin point accuracy. If the TD did not return, what pin point descent are isro guys talking about ?

juvva · Post by **juvva** » 23 May 2016 10:08

rahulm wrote:That's probably a pic of the launch config being assembled on the FLP.

at launch pic:

Singha · Post by **Singha** » 23 May 2016 10:14

ISRO official page continues to have no details on todays op. the IRNSS is the last main article there.

juvva · Post by **juvva** » 23 May 2016 10:18

Singha wrote:ISRO official page continues to have no details on todays op. the IRNSS is the last main article there.

They just update to a one liner:

http://www.isro.gov.in/update/23-may-20 ... ay-23-2016

RLV-TD HEX-01 mission accomplished successfully. Lift off at 07:00hr IST today, May 23, 2016

Singha · Post by **Singha** » 23 May 2016 10:20

a full bore shot with planned erratic zig zag highG moves in the upper atmosphere and splashdown near antarctica is called for. pissfull applications of this tech need to be multicast far and wide on the LAN.

Picklu · Post by **Picklu** » 23 May 2016 10:49

What is the black mark on the water in the above image of launch? looks like a sub periscope but probably something completely harmless.

ArmenT · Post by **ArmenT** » 23 May 2016 11:37

nirav wrote:Its been reported that the descent had pin point accuracy. If the TD did not return, what pin point descent are isro guys talking about ?

The TD was expected to return to an area in the sea simulating a runway. The TD is not expected to survive the water-landing because it isn't designed to do this. The idea behind this launch is to validate that the design could be controlled to land in a pre-planned area at a given speed. In another vehicle later down the road, they'll add wheels and make it land autonomously on an actual runway, but for now, it is all about validating that the vehicle can descend accurately to where they want it to be, and at the speed that they want it to land. And that's what the ISRO guys said that they succeeded in doing. Baby steps towards the ultimate goal....

rahulm · Post by **rahulm** » 23 May 2016 12:00

ISRO now has a more comprehensive update

"he HS9 solid rocket booster carrying RLV-TD lifted off from the First Launch Pad at Satish Dhawan Space Centre, Sriharikota at 07:00hr IST. After a successful flight of 91.1second, HS9 burn out occurred, following which both HS9 and RLV-TD mounted on its top coasted to a height of about 56 km. At that height, RLV-TD separated from HS9 booster and further ascended to a height of about 65km. "

"he vehicle’s Navigation, Guidance and Control system accurately steered the vehicle during this phase for safe descent. After successfully surviving a high temperatures of re-entry with the help of its Thermal Protection System (TPS), RLV-TD successfully glided down to the defined landing spot over Bay of Bengal, at a distance of about 450km from Sriharikota, thereby fulfilling its mission objectives. "

"Total flight duration from launch to landing of this mission of the delta winged RLV-TD, lasted for about 770seconds."

"In this flight, critical technologies such as autonomous navigation, guidance & control, reusable thermal protection system and re-entry mission management have been successfully validated."

Congratulations ISRO. Done good.

Singha · Post by **Singha** » 23 May 2016 12:09

hope by tonight the usual hi res launchpad photos are made available after checking.

Neela · Post by **Neela** » 23 May 2016 12:19

rahulm wrote:ISRO now has a more comprehensive update

"In this flight, critical technologies such as autonomous navigation, guidance & control, reusable thermal protection system and re-entry mission management have been successfully validated."
Congratulations ISRO. Done good.

Eh?
How can you claim to have validated _reusable_ themal protection system unless you recover the same and analyze the damage due to re-entry.
This coming from ISRO's website. Not from a news source.

SaiK · Post by **SaiK** » 23 May 2016 12:31

pics and video please!

congrats ISRO

sastri · Post by **sastri** » 23 May 2016 12:45

sooraj wrote:

From this image grab the size of the RLV-TD in integration, seems to be much bigger than the scale model shown in various photos for PR purpose.

A few images of scale model of RLV-TD.

rahulm · Post by **rahulm** » 23 May 2016 12:47

The RLV-TD has sparked a lot of interest. An interesting animation

The re-entry AoA in the video is incorrect.

Kiran Kumar, Chairman ISRO speaks to the media a day before launch. In this piece he states its a 1:5 scale model.

nirav · Post by **nirav** » 23 May 2016 12:52

Neela wrote:

Eh?
How can you claim to have validated _reusable_ themal protection system unless you recover the same and analyze the damage due to re-entry.
This coming from ISRO's website. Not from a news source.

They do have the much vaunted "recover it and analyze it" data from the CARE module experiment. And they certainly would have sensor data on how the Thermal protection system fared in this flight.

I dont understand the need to be so critical of the smallest of things !

Think if ISRO says that they managed to validate xyz things, one can leave it at that.

vinod · Post by **vinod** » 23 May 2016 12:54

nirav wrote:
Neela wrote:

Eh?
How can you claim to have validated _reusable_ themal protection system unless you recover the same and analyze the damage due to re-entry.
This coming from ISRO's website. Not from a news source.
They do have the much vaunted "recover it and analyze it" data from the CARE module experiment. And they certainly would have sensor data on how the Thermal protection system fared in this flight.

I dont understand the need to be so critical of the smallest of things !

Think if ISRO says that they managed to validate xyz things, one can leave it at that.

It landed without burning up and at the destined location. Isn't that the real proof of validation more than any thing else?

rahulm · Post by **rahulm** » 23 May 2016 12:59

I wonder if the RLV TD control surfaces are used in conjunction with HS9 SITVC during the ascent phase or is it only SITVC.

Has ISRO ever tested and validated high temperature re-entry glass for space vehicles? We may need small windows on human rated flights.