ISRO General News and Updates

[Adioz]

On contrary, I think REX would be more complex in nature then LEX. It would mean that you would have to consider avionics along with fluid dynamics when returning from a suborbital flight. Our first splash down test was from mere 65 km and it was a splash down test. But after LEX when we would be carrying out REX, we would be landing the RLV rather then splashing it down. So I think it would be more of a challenge to us.

You are right. Energy management for landing on a runway will be much more difficult for the REX than in LEX because in LEX we drop from a helicopter, and in REX we drop from space. Here is an interesting and detailed video that highlights the difference between LEX and REX:-

Now I assume REX will not have a de-orbit burn (no engines) or a descent from LEO (no way to initiate), but will still be a very challenging task. Even so, the last part of the landing should be simple after LEX. So the only difference would be programming something similar to TAEM (Terminal Area Energy Management) as shown in this video. How long can that take? IMHO, not more than two years at the most. So if LEX is within this year, REX will be 2020? Hopefully its not delayed beyond that.
BTW any idea about the rocket they are using for the REX? And what altitude will the RLV TD reach before descent?

 

[Chinmoy]

You are right. Energy management for landing on a runway will be much more difficult for the REX than in LEX because in LEX we drop from a helicopter, and in REX we drop from space. Here is an interesting and detailed video that highlights the difference between LEX and REX:-

Now I assume REX will not have a de-orbit burn (no engines) or a descent from LEO (no way to initiate), but will still be a very challenging task. Even so, the last part of the landing should be simple after LEX. So the only difference would be programming something similar to TAEM (Terminal Area Energy Management) as shown in this video. How long can that take? IMHO, not more than two years at the most. So if LEX is within this year, REX will be 2020? Hopefully its not delayed beyond that.
BTW any idea about the rocket they are using for the REX? And what altitude will the RLV TD reach before descent?

Can't say about the rocket they are going to use, but the altitude would be suborbital. Take it +/-100 km

 

[happylion]

REX is an orbital test not suborbital

 

[Adioz]

REX is an orbital test not suborbital

If it was orbital, how would RLV TD deorbit?

As far as I know, REX is going to take RLV TD to an altitude slightly greater than 100 km (above Karman line), but at speeds lower than orbital speeds.

RLV TD will never achieve orbit cause it does not have engines for orbital control. After the RLV TD program has concluded with SPEX early next decade, ISRO might choose to make a full fledged TSTO vehicle based on RLV TD. Such a vehicle will have multiple SCE-200 engines and will hence be able to conduct orbital flight. That is assuming that ISRO faces no obstacles and gets the SCE-200 engine flying by 2021.

I really hope the SCE-200 engine faces no problems. Every single thing we have planned for ISRO's future: HSP, new powerful rockets and a TSTO spaceplane; all depend on this one engine's success.

 

[happylion]

The engines are to be placed on the REC experiment for decelerating it from orbit. It is supposed to do a deceleration flip manuever like the space shuttle.

To quote Dr Somnath

The next experiment would be to land the vehicle on a 2km runway after releasing it from an aircraft from a height of about 5km. The third step would be to take it to a higher altitude and try the ground landing. "As the next step, we would try an air-breaking engine which is under development at Isro," Somanath said.

 

[Adioz]

"As the next step, we would try an air-breaking engine which is under development at Isro," Somanath said.

What is an "air-breaking engine"? I will assume that it is a typo and that Dr. Somnath said "air-breathing engine". Now an air-breathing engine can not perform a de-orbit burn.

If Dr. Somnath had pointed out that he was planning to use a rocket engine for orbital maneuver, then REX would have been an orbital flight. Also, this is a TD. There is no need to perform an orbital flight. All parameters can be verified even if RLV TD does not perform an orbit.


EDIT: Perhaps Dr. Somnath was talking about SPEX, not REX.

 

[lcafanboy]

This is Huge. PM Modi announces manned mission by 2022 to make India 4th nation capable of space travel and send its own astronaut into space..

 

[kunal1123]

This is Huge. PM Modi announces manned mission by 2022 to make India 4th nation capable of space travel and send its own astronaut into space..

now that is just awesome .............

 

[Vinod DX9]

Indian Manned Space Mission : What I know still now?

As India gears up for manned space mission, here are 10 points I found still now. Let's have a look :

1) India's first space mission to be commenced by 2022.

2) The mission is known as GAGANYAAN

3) Indian antariksh yatris will be known as Vyomnauts. As in Western nations and US the space crews are known as Austronauts , same in Russia known as Cosmonauts and in China they are called Taikonauts .

4) India will be the fourth country to send an Austronaut to the space by own space craft.

5) India to complete 75 years of Independence on 2022. You can understand how important and glorious is going to be the event.

6) ISRO has recently tested a Crew Escape Module. And space suits for Indian mission ....The final product will be readied soon.

7) The biggest two challenges for the mission has been said-- the rocket which need to be really big and the other one is the vyomnaut training .

8) For the mission GSLV III will be used, payload upto 7 tonnes.

9) Cost of entire mission is estimated less than 10000 crores of rupees!

10) It will be possibly a two man mission, they will be sent to the lower orbits.

The PM Modi said that the Indian Tricolour will be in the space. We are eagerly waiting for it be a reality.

Jai Hind

 

[G10]

HSP for India is still a decade away. We have not even started training Vyomonauts. GSLV MK3 needs to go under the grind and prove its mettle and be rugged before HSP. We need Sc200 and docking experiment on priority before HSP.

 

[Adioz]

This is Huge. PM Modi announces manned mission by 2022 to make India 4th nation capable of space travel and send its own astronaut into space..

View attachment 27131
Indian Manned Space Mission : What I know still now?

As India gears up for manned space mission, here are 10 points I found still now. Let's have a look :

1) India's first space mission to be commenced by 2022.

2) The mission is known as GAGANYAAN

3) Indian antariksh yatris will be known as Vyomnauts. As in Western nations and US the space crews are known as Austronauts , same in Russia known as Cosmonauts and in China they are called Taikonauts .

4) India will be the fourth country to send an Austronaut to the space by own space craft.

5) India to complete 75 years of Independence on 2022. You can understand how important and glorious is going to be the event.

6) ISRO has recently tested a Crew Escape Module. And space suits for Indian mission ....The final product will be readied soon.

7) The biggest two challenges for the mission has been said-- the rocket which need to be really big and the other one is the vyomnaut training .

8) For the mission GSLV III will be used, payload upto 7 tonnes.

9) Cost of entire mission is estimated less than 10000 crores of rupees!

10) It will be possibly a two man mission, they will be sent to the lower orbits.

The PM Modi said that the Indian Tricolour will be in the space. We are eagerly waiting for it be a reality.

Jai Hind

now that is just awesome .............

Sadly, this is all just election hyperbole.

GSLV Mk-III cannot lob our 12+ ton Orbital Vehicle into space, at least not until the planned upgrade in 2021.

Also, current 5 year plan ends 2021. So IMHO, any real funding will come only in 2022. And that is when GSLV Mk-III will be upgraded with the SCE-200 engine. After that, at least a few unmanned launches of the orbital vehicle are required before a human crew can be sent onboard. So an optimistic date for first human space flight will be 2025.

docking experiment on priority before HSP.

Docking experiment is not a must before HSP. First flight will be a crew and service module orbiting in Low Earth Orbit for a week before re-entry and splash down into the ocean.

 

[Advaidhya Tiwari]

Sadly, this is all just election hyperbole.

GSLV Mk-III cannot lob our 12+ ton Orbital Vehicle into space, at least not until the planned upgrade in 2021.

Also, current 5 year plan ends 2021. So IMHO, any real funding will come only in 2022. And that is when GSLV Mk-III will be upgraded with the SCE-200 engine. After that, at least a few unmanned launches of the orbital vehicle are required before a human crew can be sent onboard. So an optimistic date for first human space flight will be 2025.


Docking experiment is not a must before HSP. First flight will be a crew and service module orbiting in Low Earth Orbit for a week before re-entry and splash down into the ocean.

GSLV can take 10ton satellite to mid-range LEO. With new cryognic engine and semicryogenic engine, the payload to GTO will be raised to 6tons and to LEO will be 15tons. GSLV MK3 can lob 12ton into space. We are not speaking of GTO here but simply space, probably, very low orbit or suborbital one.

But, manned mission is a great wastage of resource which can be better used to send 1-2 satellites to GTO. The preparation needed will be massively expensive in addition to the expensive GSLV rocket

 

[Adioz]

SLV can take 10ton satellite to mid-range LEO. With new cryognic engine and semicryogenic engine, the payload to GTO will be raised to 6tons and to LEO will be 15tons. GSLV MK3 can lob 12ton into space. We are not speaking of GTO here but simply space, probably, very low orbit or suborbital one.

Read what I wrote again carefully. GSLV Mk-III can not take our 12+ tons orbital vehicle (Gaganyaan) to space until it is upgraded with the new SCE-200 engine in 2021. SCE-200 is the 200kN Semi-cryogenic engine that is currently in testing phase.

And the first human spaceflight is not going to be a sub-orbital one. The plan is to send the Gaganyaan up 300 km in space (well above the Karman line). They plan for Gaganyaan to stay in LEO for a week.

But, manned mission is a great wastage of resource which can be better used to send 1-2 satellites to GTO. The preparation needed will be massively expensive in addition to the expensive GSLV rocket

Merits of manned mission will be up for discussion in the next few days and the months after funds are released for the HSP. I hope you pay attention to that debate then. No point in me trying to explain all those benefits right now.

 

[Advaidhya Tiwari]

Read what I wrote again carefully. GSLV Mk-III can not take our 12+ tons orbital vehicle (Gaganyaan) to space until it is upgraded with the new SCE-200 engine in 2021. SCE-200 is the 200kN Semi-cryogenic engine that is currently in testing phase.

And the first human spaceflight is not going to be a sub-orbital one. The plan is to send the Gaganyaan up 300 km in space (well above the Karman line). They plan for Gaganyaan to stay in LEO for a week

300km is a small orbit and easily done by GSLV Mk3 for 12 ton payload. As I said, for LEO of 800km a payload of 10ton is possible by GSLV Mk3. For a LEO of just 300km, 12 ton is feasible

 

[vampyrbladez]

View attachment 27131
Indian Manned Space Mission : What I know still now?

As India gears up for manned space mission, here are 10 points I found still now. Let's have a look :

1) India's first space mission to be commenced by 2022.

2) The mission is known as GAGANYAAN

3) Indian antariksh yatris will be known as Vyomnauts. As in Western nations and US the space crews are known as Austronauts , same in Russia known as Cosmonauts and in China they are called Taikonauts .

4) India will be the fourth country to send an Austronaut to the space by own space craft.

5) India to complete 75 years of Independence on 2022. You can understand how important and glorious is going to be the event.

6) ISRO has recently tested a Crew Escape Module. And space suits for Indian mission ....The final product will be readied soon.

7) The biggest two challenges for the mission has been said-- the rocket which need to be really big and the other one is the vyomnaut training .

8) For the mission GSLV III will be used, payload upto 7 tonnes.

9) Cost of entire mission is estimated less than 10000 crores of rupees!

10) It will be possibly a two man mission, they will be sent to the lower orbits.

The PM Modi said that the Indian Tricolour will be in the space. We are eagerly waiting for it be a reality.

Jai Hind

1) It will be a 3 man mission

2)If past experience of Space Agencies is right, first lot will be test pilots from the air force.

3)Chicks in 1st lot unlikely as 1st batch of women IAF fighter pilots around 2020 too young and inexperienced. Also too few.

 

[lcafanboy]

But, manned mission is a great wastage of resource which can be better used to send 1-2 satellites to GTO. The preparation needed will be massively expensive in addition to the expensive GSLV rocket

If manned mission is wastage of resources then my dear US Russia and China wasted so much.
Actually you didn't got point. It decides great power status and India aims to be declared a super powers by 2025. So it is a necessary cost of being labelled as super power. It will also open gates to veto power.

 

[lcafanboy]

HSP for India is still a decade away. We have not even started training Vyomonauts. GSLV MK3 needs to go under the grind and prove its mettle and be rugged before HSP. We need Sc200 and docking experiment on priority before HSP.

Docking is not required as of now. It will be required only when we have space station or want to dock into any international space station.

Also mere talk of human spaceflight is different, but if it's made into national mission it becomes different. And modi did right that made it a national mission.

When russia put man in space US president aimed for moon treat this as same.

 

[G10]

Beyond 2025. Possibly 2030. Not gonna happen before 2025 for sure.

 

[Adioz]

Beyond 2025. Possibly 2030. Not gonna happen before 2025 for sure.

2030!!!!!????

Care to provide the timeline of events that would push it to such a later date? Or are you just speculating on the fly here while thinking "us Indians always face delays, never on time"?

It can happen before 2025 if GSLV Mk-III with HTVE is able to launch the orbital vehicle. It will happen in 2025 if we decide to wait till SCE-200 engines are installed on GSLV Mk-III and the rocket is man-rated.

The only scenario when we would have had to wait till 2030 for first Indian human spaceflight was if the government did not release the monies. The Government has made its will known today.

By 2030, we might have a space station program, or docking experiments at least.

300km is a small orbit and easily done by GSLV Mk3 for 12 ton payload. As I said, for LEO of 800km a payload of 10ton is possible by GSLV Mk3. For a LEO of just 300km, 12 ton is feasible

Possible, but only if they use HTVE in L110 stage and if they are able to design a light service module. As of now, the payload for HSP weighs >12.6 tons. And the service module is not yet designed, although they said that the plan was to use the PSLV 4th stage as the base for the service module.

 

[Indx TechStyle]

Hey people, nice to c ya guys again.
Modi made to head here again just for Gaganyaan.
Will keep tracking again on this thread.