LVM3 (GSLV Mark III) -- ИНДИЙСКАЯ PAKETA

[Salo]

А при чём здесь ДМ? Речь идёт о нижнем переходнике 12КРБ.

[АниКей]

Состоялась встреча главы Роскосмоса с послом Индии[/size]
:: 09.06.2011

9 июня состоялась  протокольная встреча руководителя Федерального космического агентства Владимира Поповкина с вновь назначенным послом Индии Аджаем Мальхотрой.
Стороны обсудили состояние и перспективы российско-индийского сотрудничества по всем направлениям космической деятельности.

 http://www.federalspace.ru/main.php?id=2&nid=17304

Пресс-служба Роскосмоса

[C-300]

В 2-х словах при сборке на полигоне уронили на землю одну из взрывных линз(такая здоровенная фигня из взрывчатки в форме приблизительно дольки арбуза).  

Приблизительная форма у взрывной линзы явно не как у дольки от арбуза (по крайней мере, в традиционной имплозионной схеме). Форму можно представить, если мысленно вырезать из выпулко-вогнутой линзы n-угольник.

Нейтронный активатор (шарик с полонием внутри) был уже установлен к этому моменту.

Так что уронили-то? Взрывную линзу или всю боньбу в сборе?

[Андрей Суворов]

Так что уронили-то? Взрывную линзу или всю боньбу в сборе?

Линзу. Притом, у них была одна запасная, поэтому взорвали в срок.
Притом, у индийцев, для упрощения, было всего 12 точек подрыва, в отличие от 30 в фэт мэн, соответственно, все линзы были одинаковыми, в собранном виде форма бомбы была икосаэдром. Из-за того, что схема, в общем, копировала фэт мэн, но точек подрыва было меньше, размер устройства получился больше.

Форма линзы - пятигранная пирамида, стоящая на другой, более тупой пятигранной пирамиде. А как оно там внутри, какой формы стыки между слоями - это и есть главный секрет ядрёной бомбы... Ну, то есть, в общих чертах известно, но, чтобы бомба взорвалась, как положено, форму этих поверхностей надо выдержать с точностью в 0,1 мм где-то. Реально получается в 10 раз хуже, поэтому при сборке приходится подгонять по месту. Вот во время подгонки линзу и уронили.

[ronatu]

[ronatu]

[Salo]

4 сентября 2011 провели ОСИ S200.
http://rajeev2004.blogspot.com/2011/09/s200-booster-tested-at-sdsc.html

Monday, September 12, 2011
S200 Booster Tested at SDSC

Here's video of ISRO's recent test of the S200 solid rocket booster, at Satish Dhawan Space Centre. Meant for use in the upcoming GSLV-MkIII, the S200 is the world's 3rd largest booster of its kind, after the ones used by Ariane-5 and the Space Shuttle (well, since the Space Shuttle is now retired, I guess that would make this the 2nd-largest such booster). China and Russia use purely liquid-fuel technology. Solid rocket boosters offer superior thrust performance in comparison to liquid boosters, but cannot be throttled during flight.

Видео:
http://www.youtube.com/watch?v=Nym7AOJvIiE&feature=player_embedded

[Salo]

Странно, что нет официальных сообщений. :roll:
Деза?

[Salo]

SpaceR пишет:

 Если лететь из Шрихарикоты строго на юг, пролетят аккурат над многомиллиардным Мадрасом. Если ещё западнее заворачивать - ещё больше густонаселенных территорий. [Печально]
То ж самое касается и самой южной точки. При их плотности малозаселённость острова Шрихарикота вообще подарок судьбы.

Старый пишет:

Да, блин, с Мадрасом они не угадали. Южнее нада было строить... [Печально]

Дмитрий В. пишет:

Вот кому морской старт нужен!

http://www.thehindu.com/news/national/article2444505.ece

New Delhi, September 11, 2011
India to have one more satellite launch site
PTI

Amid requests from various countries for launch of their satellites, India has decided to set up one more launch site to expand its capacity in this aspect.

At a meeting held by the Prime Minister's Principal Secretary T.K.A. Nair here to review performance of the Department of Space, it was decided that a feasibility study would be conducted for a new site, sources said.

The decision to find a new site was taken after the meeting was told that ISRO has only two satellite launch pads, both of which are affected during the cyclone season, the sources said.

The two launch pads are located at Sriharikota High Altitude Range (SHAR).

During recent years, there have been requests from a number of countries for launching their satellites in India.

[Salo]

http://www.asianscientist.com/topnews/india-isro-completes-second-test-of-s-200-solid-rocket-booster/

India Successfully Repeats Test Of Asia's Largest Solid Rocket Booster, The S-200

By Srinivas Laxman
September 14, 2011

India's ISRO successfully carried out the second test of the S-200 solid rocket booster, which will form the strap-on stage for the Geosynchronous Satellite Launch Vehicle Mark 32s maiden flight in 2012/2013.


AsianScientist (Sep. 14, 2011) – India's space program crossed an important milestone on September 4 this month, when the Indian Space Research Organization (ISRO) successfully carried out the second test of the strap-on S-200 solid rocket booster, stated to be the biggest in Asia and the third largest in the world after the ones flown on NASA's space shuttle and Arianespace's Ariane 5 rocket.

The primary function of the strap-ons is to provide an initial boost to the rocket.

The success of the test assumes significance because the S-200s will form the strap-on stage for a new rocket known as the Geosynchronous Satellite Launch Vehicle (GSLV) Mark 3 version which is now in an advanced stage of development. There will be two strap-ons in the rocket.

This vehicle, slated to make its maiden flight either towards the end of 2012 or early 2013, will fly communication satellites weighing four tons. In contrast, the present version of GSLV's can carry communication satellites weighing only up to two tons.

Once the GSLV Mark 3 becomes operational, ISRO's dependence on Arianespace – the European rocket organization – to carry its four-ton class of communication satellites will be drastically reduced.

In the recent test which was conducted at the Satish Dhawan Space Center, Sriharikota, the S-200 fired for 130 seconds without any problems. Containing 200 tons of solid propellants, the length of the stage is 21.9 meters and its diameter is 3.2 meters. The S-200 was first tested on January 24, 2010.

For its maiden flight, the rocket will lift off with the simultaneous ignition of both the stages which will burn for about 130 seconds and separate at 149.3 seconds into the flight.

[Salo]

Пугают испытательным пуском GSLV Mark III без верхней криогенной ступени в конце 2012 года:

http://www.timesnow.tv/India-in-a-new-space-league/videoshow/4385667.cms

[Salo]

http://business-standard.com/india/news/qa-k-radhakrishnan-chairman-isro/449096/

Q&A: K Radhakrishnan, Chairman, ISRO
'We need more launch pads and transponders'
Praveen Bose / September 14, 2011, 0:27 IST

K RADHAKRISHNAN The Indian Space Research Organisation (Isro) has had a challenging time in recent years and chairman K Radhakrishnan talks to Praveen Bose about some of this. Edited excerpts:

You have been increasing the frequency of launches. What are you doing to increase the launch capacity?

We are planning a third launch pad at SHAR (the Satish Dhawan Space Centre, at Sriharikota island, off the Andhra coast). A launch blocks the pad for nearly 60 days. To increase the frequency, we need more launch pads. We are seeing what the requirements are.

It is not just for the GSLV Mark-III (the new launch vehicle being planned) alone that we are in need of a launch pad. We are also planning a unified configuration launch vehicle. It is a semi-cryogenic and cryogenic stage-I. Unified configuration has the growth potential. The third launch pad will take care of this requirement. It may also be used in possible human flights. All the launch pads should be such that we should be able to use the common facilities. We are planning such an infrastructure at Sriharikota. Meanwhile, we are also considering a second launch site. We are now talking of a feasibility study of this.

What kind of technologies are you developing and how are you planning to expand the infrastructure?

We have developed a flex nozzle that's used even in the PSLV, due to which the vehicle can be controlled remotely. But, it's a small one. In GSLV Mark-III, the requirement is enormous. The development of the vehicle is on and infrastructure at the Vikram Sarabhai Space Centre and at SHAR are being enhanced for this.

Isro can today launch a four tonne-class geostationary satellite. If it is in the low-earth orbit, then we can go up to 10 tonnes. In the GSLV, 50 per cent of the velocity will be provided by the cryogenic stage. All studies, though, are to be done. Solid motors and boosters are not flexible. However, they're now steerable because of the flexible technology. We have the actuator requirement and the ability to have materials that can withstand very high temperatures.

What is the transponder shortage for India? How do you intend to make up?

There is gap of about 200 transponders in the country. We have had to take transponders on lease. Isro is trying to find if a satellite can be moved to the Indian orbital slot. In addition to hiring transponders, we will repeat GSAT-8 and GSAT-10 types of satellites and increase capacity. But, this will happen during the second half of 2012. We have been working to get transponders from abroad. We have got good proposals. We have to finalise on the need. Commercial evaluation is on. It is in the right direction. Isro is exploring possibilities of taking on rent a foreign satellite for a couple of years and acquiring more foreign transponders on lease.

What is the progress on the attempt to augment transponder capacity?

We have 86.5 transponders on lease. We facilitate the process. In the next few months, we will get some more on lease. Earlier, we had 151 transponders. With the GSAT-8 and GSAT-12, we will have 36 more transponders with the launch of GSAT-10 in the second quarter of 2012. It will be launched on board Ariane-5 (the rockets made by the European Space Agency, used to launch payloads into low Earth orbit).

We are getting ready to have a contract with Ariane. The GSAT-10 will have three types of transponders, in the Ku, C and extended-C bands. We will also repeat the GSAT-8 and GSAT-10. The satellites will be 3.3-3.4 tonne class of satellites. At the end of the 11th five-year Plan (March 2012), we will have 251 transponders; the target was 500. Several satellites failed. Insat-4B had a partial failure. Then, the capacity fell to 152. Then, we added Insat-4CR.

You are lately encouraging students and universities to build small satellites. How does it help Isro?

The student satellites are Isro's programme for the academic community. Here, students and faculty learn about all systems — engineering and other aspects of a satellite. They get a feel of the whole process for building one. Plus, we get data, and we analyse it. It helps Isro. We are developing people who are interested. We are able to get projects like Anusat, which is a small satellite with good instruments. We want to promote such endeavours. We have a template for this. Some IITs want to develop basic instruments for satellites.

[Salo]

S200 static test video:
http://www.isro.org/video.aspx

[Salo]

http://www.deccanherald.com/content/197475/next-step-indigenous-engine.html

Next step with indigenous engine
Sriharikota, Oct 12 DHNS:

Buoyed by a string of successful 'PSLV' launches, the Indian Space Research Organization (Isro) has fully geared up for the next higher level flight of its 'Geosynchronous Satellite Launch Vehicle (GSLV)' by mid-2012.

Disclosing this to reporters at the 'Satish Dhawan Space Centre' here on Wednesday, Isro Chairman K Radhakrishnan said the next GSLV flight would be with an indigenously built cryogenic stage engine and all groundwork for it were on in full swing. He also inaugurated a new 'Media Centre' in the campus.

Before the GSLV flight, there will be two more launches of the 'Polar Satellite Launch Vehicle (PSLV)' from here, namely PSLV-C19, that will carry a microwave remote sensing satellite (RiSat) and 'PSLV-C20', which will put into orbit another Indo-French satellite- 'Saral'-for ocean studies, he said. The launch of GSLV with indigenous cryogenic engine has been Isro's biggest challenge on date. Having learnt from its earlier GSLV crash, two Isro scientists Dr Veeraraghavan and Dr Ramakrishnan added that the debacle had been traced to a basic failure in the 'fuel booster turbo pump' in December 2010.

Now, the booster pump had been redesigned and tests on the pump had been successful , they said. The 'flight engine assembly' of the cryogenic stage engine was now going on, and one more 'long duration test' for the booster pump would be carried out by October-end, they added.

[Salo]

http://www.daijiworld.com/news/news_disp.asp?n_id=118806

Queried about the status of indigenous cryogenic engine that would power ISRO's heavier rocket geosynchronous satellite launch vehicle (GSLV) S.Ramakrishnan, director of ISRO's Liquid Propulsion Systems Centre (LPSC) said the agency had identified the reasons for the failure of the first engine during a flight.

"We have studied the design of booster pumps and redesigned it. The computer simulation was done and validated. One more long duration test of the cryogenic engine will be made by the end of this month," he said.

"The next GSLV will be launched with an indigenous cryogenic engine," added P.S.Veeraraghavan, director of the Vikram Sarabhai Space Centre in Thiruvananthapuram.

Queried about the one remaining Russian cryogenic engine, Radhakrishnan said one of its component has to be corrected by the suppliers before it could be used.

[Salo]

http://timesofindia.indiatimes.com/india/PSLV-launch-successful-four-satellites-in-orbit/articleshow/10327098.cms

The organization is working on the development of an indigenous cryogenic engine for the GSLV MK-III, also called C25. "We have a completely indigenous design for C25 but the development is complex will need more time," said Ramakrishnan.

[Salo]

http://www.aviationweek.com/aw/generic/story_channel.jsp?channel=space&id=news/awx/2011/10/12/awx_10_12_2011_p0-380778.xml&headline=India%20Plans%20Next%20GSLV%20Launch%20In%202012

Now under development, GSLV-MK III is designed to make India fully self-reliant in launching heavier communication satellites weighing 4,500-5,000 kg (9,900-11,000 lb.), boosting its status as a key player in the global commercial launch market. According to a senior ISRO official, GSLV-MK III is being designed to place a 4-ton-class satellite into a geostationary transfer orbit.

S. Ramakrishnan, director of ISRO's Liquid Propulsion Systems Center, says the agency has identified the issues with the GSLV upper-stage engine. "We have studied the design of booster pumps and redesigned it. The computer simulation was done and validated. One more long-duration test of the cryogenic engine will be made by the end of this month," he says.

[Salo]

instml пишет:

Acoustic/vibrational tests have been completed on the payload faring for the GSLV Mark-III:

http://tarmak007.blogspot.in/2012/03/gslv-mk-iii-payload-fairing-completes.html
http://forum.nasaspaceflight.com/index.php?topic=28334.msg872507#msg872507

[Salo]

http://www.spaceflightnow.com/news/n1205/01gslv/

A test flight of India's third-generation GSLV, called the GSLV Mk.3, has been set for early 2013, Radhakrishnan said.

"GSLV Mk.3 has crossed several major milestones," Radhakrishnan said. "The lower stages have been qualified, and we will be undertaking an experimental flight of GSLV Mk.3 in a year from Sriharikota essentially to understand the behavior of the vehicle in the atmospheric stage of flight."

Propelled by two solid rocket boosters and a liquid-fueled two-engine core stage, the suborbital test flight will lift off from the Satish Dhawan Space Center on India's east coast.

Each booster will generate 1.1 million pounds of thrust, making it the third most powerful solid rocket motor in the world after the boosters used on the space shuttle and Ariane 5 launcher.

The S200 strap-on boosters and L110 liquid-fueled core will accelerate the GSLV Mk.3 several thousand miles from the Sriharikota launch pad.

The GSLV Mk.3 is designed to launch communications satellites weighing more than four metric tons - about 8,800 pounds - once it begins orbital flights in 2014. The launcher will be able to deliver more than 10 metric tons - 22,000 pounds - into low Earth orbit.

Orbital flights of GSLV Mk.3, which require a 25-ton cryogenic upper stage, likely will not begin until 2014.
     

Artist's concept of the GSLV Mk.3 launch vehicle. Credit: ISRO


File photo of static fire testing of the GSLV Mk.3 liquid-fueled core stage's Vikas engines. Credit: ISRO

[instml]

Видео (GSLV Mk. 3)

http://www.ndtv.com/video/player/news/isros-new-monster-rocket/231686?pfrom=home-topstories

http://forum.nasaspaceflight.com/index.php?topic=15187.msg895049#msg895049