ISRO Discussion Thread

[Scotius]

Weird, isn't it? It's all solids and hypergolics. PSLV uses nitrogen on its first stage, but only for pressurisation of an additional component, which is allowing for thrust regulation of solid fuel stage. It might be cryogenically stored to improve capacity of its tanks. But is there enough of it to bring the surface of the rocket below freezing point?

[MinimumSky5]

I doubt it was the nitrogen canisters. I defiantly saw the debris falling from either the second stage, or the first interstage, and all of the control propellants for the first stage are at the bottom of the stack.

[insert_name]

22 hours ago, Scotius said:

Very fast launch. Good TWR Though i have to admit - those pieces of ice falling from the sides made me jump, before i realised what is happening. Weird, though - i watched launches from Florida and Kourou - both warm and humid environments. But i never seen so much ice falling off.

It's insulation designed to break off at launch

[tater]

 

[Nivee~]

Quote

"The first operational mission of GSLVMkIII will be Chandrayaan-2"

But this rocket has already lifted 2 satellites to their orbits, right? Were they not operational missions? What does 'operational' even mean in this context??

[Ultimate Steve]

1 hour ago, Nivee~ said:

But this rocket has already lifted 2 satellites to their orbits, right? Were they not operational missions? What does 'operational' even mean in this context??

I'd guess it would be the first mission classified as a non test flight.

[ThatGuyWithALongUsername]

On 11/14/2018 at 9:42 AM, tater said:

 

Now that's a cool picture. I missed this launch- kind of wish I didn't. Fitting, as its next mission will be a lunar lander!

[tater]

 

[Nivee~]

For some reason, i almost always miss live launches of ISRO rockets.. do they have to be so hush-hush and secretive!

[tater]

 

[YNM]

On 11/29/2018 at 1:41 PM, tater said:

 

And here's the archived livestream :

I think all launches have been in Doordarshan National.

Edited December 17, 2018 by YNM

[Parv Kerman]

On 3/27/2018 at 9:26 PM, tater said:

 

do you understand any of it?

i do coz im an indian and im proud of ISRO

[tater]

1 hour ago, Parv Kerman said:

do you understand any of it?

Nope.

 

[Parv Kerman]

1 minute ago, tater said:

Nope.

 

lol 

[tater]

 

https://twitter.com/ChrisG_NSF/status/1075020473501667328

[MaverickSawyer]

Well, it's on the IRSO to make up for three scrubs and another possible one due to weather (NROL-71 forecast isn't promising)

[Ultimate Steve]

22 minutes ago, MaverickSawyer said:

Well, it's on the IRSO to make up for three scrubs and another possible one due to weather (NROL-71 forecast isn't promising)

If ISRO scrubs and NROL scrubs, then we'll have 5 scrubs in a day

[MaverickSawyer]

1 hour ago, Ultimate Steve said:

If ISRO scrubs and NROL scrubs, then we'll have 5 scrubs in a day

Which will be a record in and of itself, won't it?

[RedKraken]

from NSF

[RedKraken]

GSAT-7A mission success.

 

[YNM]

2 hours ago, RedKraken said:

GSAT-7A mission success.

And the archived livestream if you missed it (like I did by 3 hrs, dammit !)

(actual launch at ~29 mins into the video)

On 12/18/2018 at 7:47 PM, Parv Kerman said:

do you understand any of it?

At least now I get your profile picture.

Edited December 19, 2018 by YNM

[Nivee~]

I found this, not really news but still:

ISRO's SSLV has the lowest cost/Kg to SSO orbit, almost by a factor of 3. Why is ISRO doing this? Is it 'newbie crushing' all the new small satellite launch companies? 

This is not fair.... I dunno, I like their work..but if I were working in RocketLab, after years of research we finally build a decent small rocket to take up the niche other launch vendors have missed. And lo! ISRO joins the party with a cheaper small launcher... .. I would be soooo upset!

I like ISRO, but this is so unfair.  ISRO is not in the wrong, but should SSLV monopolize this market, I am going to feel for those other companies...

Edited December 24, 2018 by Nivee~

[MinimumSky5]

While I can certainly understand the sentiment, you can't say to someone "Yes, you can do this better, cheaper, faster than everyone else, but for the sake of fairness, don't do it". If you did, we as a species would have never even developed agriculture. If this rocket flies at that price, it is bad for Rocket Labs, but that's the nature of aerospace, unfortunately. 

Edited December 25, 2018 by MinimumSky5
Bizzare autocorrects?

[Mad Rocket Scientist]

I wonder if they will manage that. It seems like that would require SRB's or reusability. If Electron develops reusability, they may be able to match or beat that.

[Nivee~]

1 hour ago, MinimumSky5 said:

While I can certainly understand the sentiment, you can't say to someone "Yes, you can do this better, cheaper, faster than everyone else, but gg or the sake of fairness, don't do it". If you did, we as a species would have never even developed agriculture. If this rocket flies at that price, it is bad for Rocket Labs, but that's the nature of aerospace, unfortunately. 

Yeah, i know..ISRO isn't doing anything wrong, morally,legally or ethically... Its just that so many new small rockets were in development. And if SSLV monopolizes the market (which it will, obviously) then except 2-3 companies, everyone else will close shop..

No one's wrong in this situation... It just feels wrong..  Then again, reality doesn't care about emotions...

1 minute ago, Mad Rocket Scientist said:

I wonder if they will manage that. It seems like that would require SRB's or reusability. If Electron develops reusability, they may be able to match or beat that.

Nah, ISRO will manage it (maybe with government subsidies, if they are really out to destroy any competition by private sector).. I found some more stuff, it has about 500 kg of payload, and its all-solid.