LVM3/GSLV Mark III News, Discussions, Updates and Reports

[Indx TechStyle]

So, for LVM3-SC variant, I case anyone knows. @Vamsi @Swesh

• Main stage: L110 (2 x Vikas engines) will be replaced by SC120 (1 x SCE-200).
• Upper stage: C25 (1 x CE-20) replaced by C32 (1 x CE-20) with more burn time and a larger cryogenic tank for propellant.
• Booster Stage: 2 x S200 boosters replaced by ????

 

[Vamsi]

So, for LVM3-SC variant, I case anyone knows. @Vamsi @Swesh

• Main stage: L110 (2 x Vikas engines) will be replaced by SC120 (1 x SCE-200).
• Upper stage: C25 (1 x CE-20) replaced by C32 (1 x CE-20) with more burn time and a larger cryogenic tank for propellant.
• Booster Stage: 2 x S200 boosters replaced by ????

S200 remains same

 

[Vamsi]

So, for LVM3-SC variant, I case anyone knows. @Vamsi @Swesh

• Main stage: L110 (2 x Vikas engines) will be replaced by SC120 (1 x SCE-200).
• Upper stage: C25 (1 x CE-20) replaced by C32 (1 x CE-20) with more burn time and a larger cryogenic tank for propellant.
• Booster Stage: 2 x S200 boosters replaced by ????

@Indx TechStyle if they could manage to replace those 2 large S200s with 4* S120s, then it can easily reach 10T to GTO. This new LV will be exactly similar to Angara A5

 

[Abdus Salem killed]

@Indx TechStyle if they could manage to replace those 2 large S200s with 4* S120s, then it can easily reach 10T to GTO. This new LV will be exactly similar to Angara A5

What's the time line for nglv

 

[Abdus Salem killed]

So, for LVM3-SC variant, I case anyone knows. @Vamsi @Swesh

• Main stage: L110 (2 x Vikas engines) will be replaced by SC120 (1 x SCE-200).
• Upper stage: C25 (1 x CE-20) replaced by C32 (1 x CE-20) with more burn time and a larger cryogenic tank for propellant.
• Booster Stage: 2 x S200 boosters replaced by ????

Wait a minute then won't this new rocket be in the class of long march 5

@Vamsi

 

[HariPrasad-1]

So, for LVM3-SC variant, I case anyone knows. @Vamsi @Swesh

• Main stage: L110 (2 x Vikas engines) will be replaced by SC120 (1 x SCE-200).
• Upper stage: C25 (1 x CE-20) replaced by C32 (1 x CE-20) with more burn time and a larger cryogenic tank for propellant.
• Booster Stage: 2 x S200 boosters replaced by ????

How much payload will get increased? Can S 200 be replaced by SC stages? Is there any increase in specific impulse in motors because of improvement in engine?

 

[HariPrasad-1]

@Indx TechStyle if they could manage to replace those 2 large S200s with 4* S120s, then it can easily reach 10T to GTO. This new LV will be exactly similar to Angara A5

Which 2 large S 200? There is only one S 200. There are 2 L110. They can be replaced with SC 120 to increase power or alternatively, S 200 can be replaced with single booster 2 SC MOTORs. I think Elon Musk rockets uses multiple SC motors in one unit to power booster if I am not wrong. @Indx TechStyle can correct me if I am wrong.

 

[Indx TechStyle]

S200 remains same

Burn time won't change? I'm assuming that higher lift off mass will require higher initial boost.

Or LVM3SC will improve thrust to weight ratio itself?

What's the time line for nglv

2030

Wait a minute then won't this new rocket be in the class of long march 5

@Vamsi

That's NGLV family (earlier known as ULV) for 2030s.

We are talking about LVM3-SC which is basically a GSLV Mk III with SCE-200 instead of Vikas, planned within next 2-3 years.

How much payload will get increased?

Around 30~50%.

Can S 200 be replaced by SC stages?

SC motors don't exist and SCE-200 will ignite after achieving a certain altitude and velocity.

They may arrive at era of NGLV or SHLV.

Is there any increase in specific impulse in motors because of improvement in engine?

That is exactly my question. New motors or improved S200.

Which 2 large S 200? There is only one S 200. There are 2 L110. They can be replaced with SC 120 to increase power or alternatively, S 200 can be replaced with single booster 2 SC MOTORs. I think Elon Musk rockets uses multiple SC motors in one unit to power booster if I am not wrong. @Indx TechStyle can correct me if I am wrong.

Read his comment again, he's only calling S200 large as compared to SC120 and not a new variant.

BTW, it's 2 S200 in one stage and only single L110 stage (enclosing two Vikas X), contrary to what you wrote.

 

[Vamsi]

Which 2 large S 200? There is only one S 200. There are 2 L110. They can be replaced with SC 120 to increase power or alternatively, S 200 can be replaced with single booster 2 SC MOTORs. I think Elon Musk rockets uses multiple SC motors in one unit to power booster if I am not wrong. @Indx TechStyle can correct me if I am wrong.

LVM3 has 2 S200 boosters and 1 L110 core stage (powered by 2 Vikas engines).

 

[Vamsi]

Burn time won't change? I'm assuming that higher lift off mass will require higher initial boost.

Or LVM3SC will improve thrust to weight ratio itself?

Burn time won't change, same S200 boosters will be used.....

There is no need to improve T/W.... because 2 S200 combined give massive 10,300KN of thrust.....it's more than enough to compensate for increased lift off mass

 

[Abdus Salem killed]

Burn time won't change? I'm assuming that higher lift off mass will require higher initial boost.

Or LVM3SC will improve thrust to weight ratio itself?

2030

That's NGLV family (earlier known as ULV) for 2030s.

We are talking about LVM3-SC which is basically a GSLV Mk III with SCE-200 instead of Vikas, planned within next 2-3 years.

Around 30~50%.

SC motors don't exist and SCE-200 will ignite after achieving a certain altitude and velocity.

They may arrive at era of NGLV or SHLV.

That is exactly my question. New motors or improved S200.

Read his comment again, he's only calling S200 large as compared to SC120 and not a new variant.

BTW, it's 2 S200 in one stage and only single L110 stage (enclosing two Vikas X), contrary to what you wrote.

What are the specs of LVM3-SC
And NGLV
What's the difference in them can you pls compare

 

[Indx TechStyle]

What are the specs of LVM3-SC

6 tonnes to GTO.
13 to 16 tonnes to LEO.

It's an improvement over existing LVM3 (GSLV Mk III) just like PSLV-XL was a great improvement over PSLV.

And NGLV
What's the difference in them can you pls compare

NGLV is a series of rockets with modular design (parts are interchangeable between other rockets in series). They will be based upon semi-cryogenic engines just like current SLV family is planned around Vikas series engines.

It will replace PSLV, GSLV, LVM3 with a single family of rockets added with an HLV variant.

Basic NGLV variant to replace PSLV will lift 4-4.5 tonnes to LEO and 1.5 to 2 tonnes to LEO and biggest one will be 25 tonnes to LEO and 10 tonnes to GTO (Long March 5 class). Primary purpose of these carrier rockets is to build Indian space station.

NGLV platform will also have reusable variants and methane engine based rockets. Basically, a single universal platform for Indian orbital rockets in future.

 

[Vamsi]

6 tonnes to GTO.
13 to 16 tonnes to LEO.

It's an improvement over existing LVM3 (GSLV Mk III) just like PSLV-XL was a great improvement over PSLV.

NGLV is a series of rockets with modular design (parts are interchangeable between other rockets in series). They will be based upon semi-cryogenic engines just like current SLV family is planned around Vikas series engines.

It will replace PSLV, GSLV, LVM3 with a single family of rockets added with an HLV variant.

Basic NGLV variant to replace PSLV will lift 4-4.5 tonnes to LEO and 1.5 to 2 tonnes to LEO and biggest one will be 25 tonnes to LEO and 10 tonnes to GTO (Long March 5 class). Primary purpose of these carrier rockets is to build Indian space station.

NGLV platform will also have reusable variants and methane engine based rockets. Basically, a single universal platform for Indian orbital rockets in future.

biggest one can technically reach 75ton to LEO....the configuration should be 2*SC400 boosters around the core NGLV, just like how Falcon-Heavy is to Falcon 9

 

[Indx TechStyle]

biggest one can technically reach 75ton to LEO....the configuration should be 2*SC400 boosters around the core NGLV, just like how Falcon-Heavy is to Falcon 9

That will be SHLV, not included in NGLV portfolio yet.

It might have 4-8 clustered SCE-200 at core (or a bigger semi cryo engine) and Vikas X engine boosters in place of S200 (booster being same as size of LVM3) and a far more powerful cryogenic upper stage. 60-130 tonnes in LEO.

SHLV will come around in 2040s.

 

[Vamsi]

That will be SHLV, not included in NGLV portfolio yet.

It might have 4-8 clustered SCE-200 at core (or a bigger semi cryo engine) and Vikas X engine boosters in place of S200 (booster being same as size of LVM3) and a far more powerful cryogenic upper stage. 60-130 tonnes in LEO.

SHLV will come around in 2040s.

2*CE-20 engines will be enough for upper stage of SHLV.... configuration might be as below..

1st stage : 2*SC400 boosters + 1*SC400 core stage each powered by 4*SCE-200 engines, total 12 engines.
2nd stage : SC120 powered by single SCE-200
3rd stage : C-60 powered by twin CE-20s

The above configuration is exactly similar to Chinese Longmarch-5DY which is being planned for their manned lunar mission, only difference is that they use 7*YF-100 engines in core stage ,while for us, 4*SCE-200s are enough , because our SCE-200 is far more powerful than their YF-100.

2 such SHLVs are required for manned moon landing, one to carry the lander and the other for manned spacecraft...as far as I understand, our current Gaganyaan spacecraft won't be suitable for manned lunar mission.....we would need an entirely new spacecraft for that... Gaganyaan weighs 7.8 tons at Max ...while our future gen manned spacecraft should weigh around 20tons.

 

[Vamsi]

That will be SHLV, not included in NGLV portfolio yet.

It might have 4-8 clustered SCE-200 at core (or a bigger semi cryo engine) and Vikas X engine boosters in place of S200 (booster being same as size of LVM3) and a far more powerful cryogenic upper stage. 60-130 tonnes in LEO.

SHLV will come around in 2040s.

Vikas or it's improved variants cannot power SHLV....reason is very simple....it has very low specific impulse and thrust when compared to SCE-200, only possible variant of VIKAS powering a future LV would be the Methalox variant of Vikas & that too if it is feasible at all...hence, after SCE-200 becomes operational, VIKAS will be retired for good.

 

[Indx TechStyle]

2 such SHLVs are required for manned moon landing, one to carry the lander and the other for manned spacecraft...as far as I understand, our current Gaganyaan spacecraft won't be suitable for manned lunar mission.....we would need an entirely new spacecraft for that... Gaganyaan weighs 7.8 tons at Max ...while our future gen manned spacecraft should weigh around 20tons.

Hold your horses bro.
ISRO hasn't came up with manned spaceflight, a space station, Rendezvous docking or soft landing on moon yet.

Though, manned moon spacecraft would weigh well above 20 tonnes.

 

[Swesh]

Successful CE20 uprated Engine Hot Test with 21.8 T vacuum thrust

Nov 09, 2022
The CE20 cryogenic engine indigenously developed for LVM3 has been subjected to successful hot test at an uprated thrust level of 21.8 tonne for the first time on 9th Nov, 2022. This will enhance the LVM3 payload capability upto 450 kg with additional propellant loading.
The major modifications carried out on this test article compared to previous engines was introduction of Thrust Control Valve (TCV) for thrust control. In addition to this 3D printed LOX and LH2 turbine exhaust casings were inducted in the engine for the first time. During this test the engine operated with ~20t thrust level for first 40s, then thrust level was increased to 21.8t by moving thrust control valve. During the test, engine and facility performance was normal and required parameters were achieved.

Thrust Chamber Pressure Curve

Engine Hot Test

 

[Vamsi]

 

[TopWatcher]

When we will take big jump ?