ISRO General News and Updates

[Varoon2]

Excuse the layman's ignorance, but would there be any major difference between the tankage for LH/LO2, and the Semi-Cryo tankage with Kerosene( or whatever the fuel ) and LO2? Or is it just a matter of changing the fuel. Would any special materials or components have to be developed?

 

[Vamsi]

Excuse the layman's ignorance, but would there be any major difference between the tankage for LH/LO2, and the Semi-Cryo tankage with Kerosene( or whatever the fuel ) and LO2? Or is it just a matter of changing the fuel. Would any special materials or components have to be developed?

It depends mainly on many factors like type of fuel used, fuel density, temperature, Mixture ratio of the engine etc. For example, Density of LH2 is very low ,hence it requires a Large tank , also it requires excessive thermal coating to prevent LH2 from boiling. For kerosene, its density is less than LH2 hence it requires small tank. Hence dry weight of LH2/LOX stage is very high than a Kerosene /LOX stage

 

[Okabe Rintarou]

Excuse the layman's ignorance, but would there be any major difference between the tankage for LH/LO2, and the Semi-Cryo tankage with Kerosene( or whatever the fuel ) and LO2? Or is it just a matter of changing the fuel. Would any special materials or components have to be developed?

LOX tank should be same in both Cryo and Semi-cryo, except for size, which is bigger in semi-cryo in case of GSLV.
Liquid Hydrogen tank, though, is much more challenging. Especially if built for upper stages, because of the fact that hydrogen liquifies at much lower tempereatures, causes embrittlement and is hard to store due to it being the smallest atom making it easier to diffuse right through your container's material. Insulation of the Liquid Hydrogen tank from all heat sources to prevent Hydrogen boil-off is a big problem, especially in cryogenic upper stages that get exposed to direct solar and other space radiation without convection to rely on as a heat sink. Kerosene is much easier by comparison.

 

[Vamsi]

It's about private consortium manufacturing of GSLV-MK3 , increasing its production rate and it's 1st commercial launch

 

[Vamsi]

 

[Vamsi]

If it's true, then there will be atleast 3 GSLV-MK3 launches in 2022 i.e Chandrayaan-3, Gaganyaan-1,and this commercial launch. Do we really have the manufacturing capacity to build and launch 3 GSLV-MK3'S in a year ?

 

[Gessler]

ISRO is considering developing a next-generation astronomical satellite to follow up on its AstroSat mission


ISRO’s first mission dedicated for astronomy, AstroSat, launched on 28 September 2015 with its design life of five years, on Tuesday completed six years of its operation. “It (AstroSat) is expected to last some more years”, A S Kiran Kumar who as the then Chairman of ISRO led the mission team, and is presently serving as the chair of the apex science committee at the space agency, told PTI. “We can expect some more results to come which will be path-breaking”, he said.

ISRO is considering developing a next-generation astronomical satellite to follow up on its AstroSat mission.

ISRO’s first mission dedicated for astronomy, AstroSat, launched on 28 September 2015 with its design life of five years, on Tuesday completed six years

www.bollyinside.com

Astrosat also has (or at least used to have) one of the better public outreach programs regarding the collected data. There used to be a "Astrosat Picture of the Month" release on the ISRO site every month detailing some amazing photos & observations made by various national & international researchers using the sat's data.

But for some reason it stopped - I wonder why, considering the Sat is still in operation.

 

[Vamsi]

This pic was from a presentation given by Gaganyaan project director.
ISRO is planning to develop a space habbitat after manned launch. They are gonna demonstrate the space habbitat after the manned mission and later docking using the Gaganyaan spacecraft

 

[Vamsi]

@Gessler @fire starter @Indx TechStyle @Hariharan_kalarikkal @FalconSlayers @Haldilal
I have an interesting observation here . Chandrayaan-3 is supposed to be GSLV-MK3 M2 flight and if this commercial launch is M3 flight, then the next M4 must use SC120 Semi-Cryo stage as per this presentation of Dr.S Somanath. So can we expect a Semi-Cryo based GSLV-MK3 launch as early as 2023. Also GSAT-20 another I-6K class satellite is supposed to be launched by GSLV-MK3.

 

[Okabe Rintarou]

This pic was from a presentation given by Gaganyaan project director.
ISRO is planning to develop a space habbitat after manned launch. They are gonna demonstrate the space habbitat after the manned mission and later docking using the Gaganyaan spacecraft

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Don't know whether to be happy or sad. Its inflatable. Is ISRO that afraid of advancing our ring-forging capability from the current 4 meters to 10 meters? I mean, we'll need it at some point, right? After all, in the 2030s, we should be targeting to build our own moon rocket, probably one on the lines of Starship and Superheavy.

 

[Indx TechStyle]

@Gessler @fire starter @Indx TechStyle @Hariharan_kalarikkal @FalconSlayers @Haldilal
I have an interesting observation here . Chandrayaan-3 is supposed to be GSLV-MK3 M2 flight and if this commercial launch is M3 flight, then the next M4 must use SC120 Semi-Cryo stage as per this presentation of Dr.S Somanath. So can we expect a Semi-Cryo based GSLV-MK3 launch as early as 2023. Also GSAT-20 another I-6K class satellite is supposed to be launched by GSLV-MK3.View attachment 113844

In 2019, they said SCE-200 will be ready by 2022 and thereafter trials, make it highly unlikely to be launched in 2023.
And then, corona has 1.5 years of ISRO since then.

 

[Indx TechStyle]

Idiotic musings!!
So, it's democrazy vs cum-unism for 50 cent trolls.

 

[Vamsi]

Idiotic musings!!
So, it's democrazy vs cum-unism for 50 cent trolls.
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are they Porkies ?

 

[Indx TechStyle]

are they Porkies ?

chinkas.

 

[Vamsi]

Proposed Third Launch Pad rendering

 

[Mantospace]

Idiotic musings!!
So, it's democrazy vs cum-unism for 50 cent trolls.
View attachment 114068View attachment 114069

Chinkis paagal hoon gaye hai. Why they bothering if they are so ahead.

 

[Vamsi]

Latest screenshots from a presentation by SDSC director

 

[Vamsi]

Latest screenshots from a presentation by SDSC director

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Video of the above presentation

 

[Akula]

Don't know whether to be happy or sad. Its inflatable. Is ISRO that afraid of advancing our ring-forging capability from the current 4 meters to 10 meters? I mean, we'll need it at some point, right? After all, in the 2030s, we should be targeting to build our own moon rocket, probably one on the lines of Starship and Superheavy.

This video is from China and it's around 2 years old. They are making 10m ring.
Do we have plans for bigger hydraulic forging machines? I read comments in AMCA thread about forging machines and there use in building aero structures.

 

[Okabe Rintarou]

This video is from China and it's around 2 years old. They are making 10m ring.
Do we have plans for bigger hydraulic forging machines? I read comments in AMCA thread about forging machines and there use in building aero structures.

Yeah. China is planning to have a Moon Rocket by 2030, its for that.
Don't think there is any program to have those large forging machines in India yet, sadly. Lets see if a requirement comes up from DRDO/ISRO in 5 years or so.