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#180
by
AJA
on 04 Jan, 2014 16:23
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L-40's have been filed with UH -25 (2150 IST).The second stage GS-2 (whose predecessor leaked)
was filled by 1800 IST - after prep commenced at 1148 IST.
(N2O4 completed by 1423 IST,
UH25 started at 1618 IST)Seems a bit odd - a) given that it's so early, and that the last time round, they did the tanking ~7 hrs prior to launch IIRC b) It's taken ~6 hours to fill the second stage. I guess they deliberately slowed it up, and had leak checks periodically.
Can anyone here confirms that all the photos and videos currently on the ISRO website are from the second launch attempt and not from the one last August? Thanks!
The ones in
my post earlier are all from the January campaign, as are the pictures posted today... (It's a guess...given that these photos weren't posted for the previous launch campaign).
Sure, it may not be paint, and it may just be the colour of the insulation material, but what good insulators are coloured black?
It is not a black paint but I guess its a "Multilayer Insulation blanket" wrapped manually. It came in all colors.
It strikes me now that quite a few of the shuttle's tiles were great insulators and they were black too. Do we know what insulating material they're using for the cryo-stage? Some carbon composite?
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#181
by
Launch Fan
on 04 Jan, 2014 17:02
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Thanks for the coverage, but in summary, was this vehicle leaking and they rolled back, fixed and rolled back out again? That was the interim delay?
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#182
by
Terry Rocket
on 04 Jan, 2014 17:32
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Did they replace the booster or just repair it?
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#183
by
Kryten
on 04 Jan, 2014 17:35
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Did they replace the booster or just repair it?
The stage that leaked was replaced with a new one made from an alloy less susceptible to cracking; the first stage is also new, and the boosters were refurbished.
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#184
by
Chris Bergin
on 04 Jan, 2014 19:10
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And a reminder, we're going with this thread for this next attempt. A link to the first live coverage post will be added to the opening post.
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#185
by
chota
on 04 Jan, 2014 23:19
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#186
by
Chris Bergin
on 04 Jan, 2014 23:51
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#187
by
AJA
on 05 Jan, 2014 03:53
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L-40 N2O4 filling completed as of 2344 IST last night.Preparations on for Cryo stage filling.LOX filling commenced @ ~1147 ISTGSLV getting ready !!
That is a fantastic shot.
A new acoustic suppression system has come up on this launch pad(Behind the ISRO logo). This will be used for GSLV-MK3 launches
Interesting. A similar pic in the brochure has a white panel hosting the ISRO logo, so I guess they have changed it. Source/details?
Also, looking at the EOC-EIRP diagrams for the Ku and the Extended C band transponders - does anyone know how the perimeter has come to be defined by straight edges for these two sets (6 transponders each)? The Ka band (going to be used for attenuation studies, 2 operating frequencies, one transponder each I think) zones of coverage are delineated by a more intuitive ~circle..
Btw, here's a shot of the cryo-stage mounted in the diffuser at the LPSC Mahendragiri High Altitude Test Facility :
https://twitter.com/ISROOFFICIAL/status/419135493884768256
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#188
by
hop
on 05 Jan, 2014 07:53
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#189
by
Artyom.
on 05 Jan, 2014 08:49
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T-1 hour
ISRO @ISROOFFICIAL
Filling of Liquid Hydrogen (fuel) into the cryogenic stage of GSLV D5 completed.
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#190
by
Zaran
on 05 Jan, 2014 09:14
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Webcast is showing live images from mission control and of the pad but keeps cutting back to the bluescreen intermittently.
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#191
by
ss1_3
on 05 Jan, 2014 09:17
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Watch it on National TV live Youtube channel:
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#192
by
Artyom.
on 05 Jan, 2014 09:17
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ISRO webcast started
!
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#193
by
Zaran
on 05 Jan, 2014 09:21
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The ISRO Webcast, while lower video quality has English commentary along side the Indian for those wondering what is being talked about.
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#194
by
Artyom.
on 05 Jan, 2014 09:22
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#195
by
Zaran
on 05 Jan, 2014 09:26
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India Cryogenic stage being shown (second image)!
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#196
by
antriksh
on 05 Jan, 2014 09:29
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#197
by
Artyom.
on 05 Jan, 2014 09:32
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#198
by
Chris Bergin
on 05 Jan, 2014 09:33
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T-15 mins.
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#199
by
Artyom.
on 05 Jan, 2014 09:38
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T-10 mins.
!