ISRO to build third launchpad at Sriharikota..

[BlueDot_in_Space]

Congrats guys! Your progress in space is a testament to your prowess in "special" sciences.
On topic: Whats the progress with the cryogenic engine on GSLV Mark III? Last I heard from a friend who graduated (abroad) with me was that they were having trouble with stabilizing LOX+LH2 mix.

gsLVM3 uses a cryo stage with the gas generator cycle that is less complex than the one (staged combustion) used by GSLV mk2's indigenous cryo stage. ISRO has done ground demonstrations of the mk2 cryo engine many times, but it failed shortly after ignition in the first flight demonstration. This led to reworking on the design of fuel booster pumps with enhanced margins. ISRO had only single ground test facility for cryo engines and so rework on mk2 engine caused delays in development of mk3 cryo engine. A second test facility has been built and soon ground testing of mk3 cryo engine will start.

Regarding Mark III, are you sure that Mark III will carry-out the manned flight? If I remember correctly, it was in 20-25 T class vehicle. For manned mission and support systems, don't you need a minimum of 50T+?

gsLVM3 can carry a 10 ton payload to LEO, which is more than sufficient for manned LEO flights. normal weight of a manned capsule is around 4-5 ton.

 

[arp2041]

Regarding Mark III, are you sure that Mark III will carry-out the manned flight? If I remember correctly, it was in 20-25 T class vehicle. For manned mission and support systems, don't you need a minimum of 50T+?

sure about mark 3 carrying first Indian astronauts, not sure about the payload carrying capacity u described. It will be manned mission to LEO, which i think Mark 3 is capable of.

former ISRO chairman interview (Straight from the horse's mouth...)

India Joins League of Lunar Nations - IEEE Spectrum

 

[Hyperion]

Oh, I confused it with the planned "manned lunar mission" !

gsLVM3 uses a cryo stage with the gas generator cycle that is less complex than the one (staged combustion) used by GSLV mk2's indigenous cryo stage. ISRO has done ground demonstrations of the mk2 cryo engine many times, but it failed shortly after ignition in the first flight demonstration. This led to reworking on the design of fuel booster pumps with enhanced margins. ISRO had only single ground test facility for cryo engines and so rework on mk2 engine caused delays in development of mk3 cryo engine. A second test facility has been built and soon ground testing of mk3 cryo engine will start.



gsLVM3 can carry a 10 ton payload to LEO, which is more than sufficient for manned LEO flights. normal weight of a manned capsule is around 4-5 ton.

Forgot it was LEO. I made a mistake that it was a planned manned "lunar" mission.

sure about mark 3 carrying first Indian astronauts, not sure about the payload carrying capacity u described. It will be manned mission to LEO, which i think Mark 3 is capable of.

former ISRO chairman interview (Straight from the horse's mouth...)

India Joins League of Lunar Nations - IEEE Spectrum

 

[IND151]

right step from ISRO

number of operations carried out by ISRO has increased in recent years so this move was needed

 

[Rocky25]

Congratz ISRO, US and China have successful anti-satellite programs, India should think how it will protect its satellites and device a method to launch satellites during war, I hope predefined places are threat no. 1.

 

[IND151]

Congrats guys! Your progress in space is a testament to your prowess in "special" sciences.
On topic: Whats the progress with the cryogenic engine on GSLV Mark III? Last I heard from a friend who graduated (abroad) with me was that they were having trouble with stabilizing LOX+LH2 mix.

Russians pointed out maybe that heat shield on GSLV which had our first indigenous cryogenic engine was faulty(bigger than necessary)

ISRO has worked over it and a new heat shield for GSLV is 3.4 meters in diameter ( smaller than 4 meter previous one )