Chandrayaan-2 launch put off, maybe for a few moons
SRIHARIKOTA: A leak in the helium bottle of the cryogenic engine of GSLV-MkIII forced the Indian Space Research Organisation (Isro) to abort the launch of Chandrayaan-2 early on Monday. The launch was called off just 56 minutes before the scheduled lift-off at 2.51am.
While Isro officially confirmed “a technical snag” in GSLV-MkIII, five sources independently confirmed to TOI that the launch was put off because of a leak in the cryogenic stage. “As a measure of abundant precaution, Chandrayaan-2 launch has been called off for today. Revised launch date will be announced later,” Isro tweeted.
“After filling liquid oxygen (oxidiser) and liquid hydrogen (fuel), helium was being filled. The procedure is to pressure the helium bottle up to 350 bars and regulate the output to 50 bars. After filling helium, we found the pressure was dropping, indicating there was a leak,” a senior scientist told TOI. “The team is yet to pinpoint the exact spot of the leak in the gas bottle; there could be multiple leaks.”
一位资深科学家告诉印度时报记者：“在装满液氧(氧化剂)和液氢(燃料)之后，氦也装满了。程序是将氦气瓶的压力提高到350 bar，并将输出调节到50 bar。研究小组还没有找到泄漏的确切位置;可能发生了多次泄漏。”
Glitch during June 22 test
Significantly, a leak of the oxygen tank was detected during a ground test of an identical cryogenic engine on June 22, but Isro decided to go ahead with the launch. A senior scientist told TOI that Isro would “come back soon”, indicating the agency is trying to get the rocket off ground before the present launch window ends on July 31. The next best launch window (which ensures full 14 Earth days for the lander and the rover on Moon) comes in September.
译文来源：三泰虎 http://www.santaihu.com/48039.html 译者：Jessica.Wu
Desh ke aage kuch nahi It's better that the scientists noticed the leak, otherwise it would have been a big accident. Better late than being sorry.
Good,detecting a disaster beforehand is also a achievement,thanks ISRO, you''ll make us proud
Calling off the launch is a standard procedure of NASA, SpaceX when a fault is detected. Things are needed to verifief again. ISRO, cant have typical ...
Silent_Speaker_in•Very Much Here only•2 hours ago
Reading the article, It appeara to be a quality issue.,Any pressurised chamber needs to be pressure tested at well high pressure to ensure no leaks are present.., many NDT techquies are used.,This is very standard quality control procedure accross hightech industries.,Now it has happned, take it as lesson learned and make stringent procedures so that it never happens again.,Lets celebrate successful chandrayaan -2 launch soon!! Very best of luck!!
himwant prasad•South Asia•2 hours ago
Thanks to the scientists at ISRO whose eyes did not miss the glitch. The launch was abandoned and now the flaw is to be corrected and a whole set of new calculations is to be fed in to make it reach its destination as planned. India is praying for blessings of Almighty to give us his success, he the lord alone holds the title of successful.
haresh lalla•2 hours ago
Excellent monitoring and avoiding big failure. I am sure Root cause analysis will pinpoint cause of error. Correcting the failures make mission 100% reliable. Wishing ISRO all the best for a very successful mission.
Nationalist•2 hours ago
Modi ji should be given full credit if the launch is successful. without Modi ji this project would have never happened
Logician• Nationalist•2 hours ago
This project should be now cancelled due to the following: Instead of spending thousands crore on Chandrayaan-2 and putting it off, it is time to spend that much money for sea water desalination purposes to convert the salty sea water into drinking water as it is done in Muslim countries like UAE and Saudi Arabia. Millions of people in India do not have access to safe drinking water and India is heading towards unimaginable water crisis
Tulunad•2 hours ago
Modi magic of fooling the gullible voter with fake jhumlas didn't work here
Nation•2 hours agoLet error less launch next time.
Soumya Banerjee•2 hours ago
ISI sabotaged the operation.
Krishna•2 hours ago
This is a correct decision by the scientists to postpone the launch to a later date,due to a technical snag,Identification of fault at the eleventh hour itself is a great success it's achievement of our scientists that they stopped it at the right time before the occurrence ...
Hem Nath•Unknown•2 hours ago
Moon and earth are going to be around for few more billion years. No hurry, let ISRO take it’s time.
infinity gaming•2 hours ago
We are proud of our india.
Hopeless•2 hours ago
Modi hai toh mumkin hai! Put him in the rocket and he’ll fly it anywhere, even to places no one has ever been to
Kumar•2 hours ago
close the leak with insulation tape and fly man!!,you can't just stop because of some leak..,My dad's scooter oil has been leaking since 10years still runs.. !!
Gopalarathnam Krishna Prasad•Hyderabad•3 hours ago
missions such as this best kept secret and announced after success.. this not a tv show or crocket toget public towitnrss like a cricket match..
Guest•3 hours ago
It''s better to put off rather than taking risk
Abhishek Kaushik•Patna•3 hours ago
It''s good that leak was detected beforehand otherwise we would have been looking at a launch failure...
Hi Sudip•Unknown•3 hours ago •Follow
Mission will be successful next time !!