
Mind boggling amount of work was done in next 24 hrs after glitch was detected.
Singha wrote:Apollo11 got to the moon and back in 8 days.
so why is our chandrayaan only getting to the moon in 48 days in early september.
was it because they used the huge Saturn5 rocket to make a direct beeline for the moon instead of slowly doing orbit raising manouvers ?
48 days would have needed a lot of food and o2 for the astronauts which was not feasible.
juvva wrote:From the plots, there was a slight under performance of the cryo stage.This was apparently more then compensated by the longer burn to depletion.
prasannasimha wrote:Singha wrote:Apollo11 got to the moon and back in 8 days.
so why is our chandrayaan only getting to the moon in 48 days in early september.
was it because they used the huge Saturn5 rocket to make a direct beeline for the moon instead of slowly doing orbit raising manouvers ?
48 days would have needed a lot of food and o2 for the astronauts which was not feasible.
Apollo 11 could directly lift 100 tons to GTO ! Moon lander was 13 tons ! Totally different specs.
We can do TLI to moon directly but weight woild be less
Mort Walker wrote:juvva wrote:From the plots, there was a slight under performance of the cryo stage.This was apparently more then compensated by the longer burn to depletion.
Could you post the plot here possibly? Please?
chetak wrote:
certainly, but we did not have the benefit of the efforts of many shady and whitewashed germans who were forced to lay the framework for such heavy-lift vehicles.
our chandrayaan is almost completely an SDRE effort.
Neela wrote:Clinical stuff from ISRO. Helium leak issue found. Communicated. Problem analysis done. Issue fixed. New launch date announced. Launched.
You wont get this even in pvt industries
juvva wrote:Mort Walker wrote:
Could you post the plot here possibly? Please?
Here is the launch video on youtube.
https://www.youtube.com/watch?v=2WO8XVWmJNQ
Please see the plots at 43:04 for example.
la.khan wrote:Neela wrote:Clinical stuff from ISRO. Helium leak issue found. Communicated. Problem analysis done. Issue fixed. New launch date announced. Launched.
You wont get this even in pvt industries
Looks like ISRO practices Agile/XP/Lean/Kanban![]()
![]()
Singha wrote:Apollo11 got to the moon and back in 8 days.
so why is our chandrayaan only getting to the moon in 48 days in early september.
was it because they used the huge Saturn5 rocket to make a direct beeline for the moon instead of slowly doing orbit raising manouvers ?
48 days would have needed a lot of food and o2 for the astronauts which was not feasible.
ArjunPandit wrote:la.khan wrote:Looks like ISRO practices Agile/XP/Lean/Kanban![]()
![]()
Whatever one might question about the culture, it speaks volumes that the launch was halted in front of the president of the nation. How many of us would stop a crap project ppt in front of CTO just because some parameters were not great. Hats off to the ISRO guys. These guys should be the role models for entire generation
sudhan wrote:Looks like them wily SDREs have imprinted the national emblem on the wheels of the rovers![]()
The graphic before the launch showed the lil rover happily laying down some sweet tread prints with the emblem in it as it motored along..
UlanBatori wrote:sudhan wrote:Looks like them wily SDREs have imprinted the national emblem on the wheels of the rovers![]()
The graphic before the launch showed the lil rover happily laying down some sweet tread prints with the emblem in it as it motored along..
U mean sdres are going to put Ophishial 3-lion passport seal all over lunar South Pole aka "New Xinjiang"? And call it "Greater Arunachal"?
When I saw the Lunar Chariot I realized that it could simply drive around in a circle to keep the solar panel always facing the Sun. Duh!
sudhan wrote:UlanBatori wrote:U mean sdres are going to put Ophishial 3-lion passport seal all over lunar South Pole aka "New Xinjiang"? And call it "Greater Arunachal"?
When I saw the Lunar Chariot I realized that it could simply drive around in a circle to keep the solar panel always facing the Sun. Duh!
That's what the ISRO graphic showed, not able to make the tread marks out clearly in pics of the rover.. Will have to wait and see
RonyKJ wrote:The plot is a bit confusing. Horizontal axis is time in seconds. White vertical axis shows rel velocity. What is the red vertical axis? Is it altitude? But it doesn't correspond to the read out. At 944.5 secs, read out says altitude is 171.4 km but graph corresponds to 550.
It would seem like under performance but Dr Sivan said over performance by 6000 km.
I have a screen grab at 42 secs but cant figure out how to embed the image here.
From a distance, it looks like a shivalingam with a third eye, above three swipes of vibhuti.
Project Director: Vanitha Mutthayya Mission Director: Ritu Karidhal
ravikr wrote:Noob Question. Why L110 shoots it to 205Kms altitude when required is 170 Kms and when C25 kicks in it starts loosing altitude while gaining RV. Please can any Gurus explain.
Sivan also appreciated the work done by the Isro team in fixing the technical glitch that led to aborting the mission on July 15.
"We had a serious tech snag, and we fixed it. Now Isro bounced back with flying colours. Immediately after the technical snag
observed a week ago, the entire Isro team swung into action. The work that was done in the following 24 hours was mind
boggling. The vehicle was brought back to normal and the root cause of the tech snag was identified and corrected. Everything
happened in 24 hours. In the next one and a half days, the required tests were conducted to ensure that the corrections made
were proper and in the right direction. The vehicle was then handed over to the management for action.”
“It all happened because of the hard work of the team Isro especially engineers, technicians, technical assistants and support
staff… In fact, they forgot their families and sacrificed their time and ensured to fix the snag.
In fact, the expert team constituted
was on the job for the last seven days to ensure that every system functioned properly. My duty is to salute all of them," he
said.
Return to “Military Issues & History Forum”
Users browsing this forum: jaysimha and 88 guests