ISRO Orbital Vehicle
|Country of origin||India|
|Design life||7 days|
|Orbit regimes||Low Earth|
The Indian manned spacecraft temporarily named Orbital Vehicle is intended to be the basis of the indigenous Indian human spaceflight program. The capsule will be designed to carry three people, and a planned upgraded version will be equipped with rendezvous and docking capability. In its maiden manned mission, ISRO's largely autonomous 3-ton capsule will orbit the Earth at 248 miles (400 km) altitude for up to seven days with a two-person crew on board. The crew vehicle is planned to be launch on ISRO's Geosynchronous Satellite Launch Vehicle Mk III, which is currently under development, in April 2014. As of February 2014, the HAL-manufactured crew module structural assembly was transferred to ISRO.
The development of the Orbital Vehicle began in 2006. The plan was to design a simple vessel similar to the Mercury-class spacecraft with an endurance of about a week in space. It was designed to carry two astronauts and to land in water upon re-entry. The design was finalized by March 2008, and was submitted to the Government of India for funding. The funding for the Indian Human Spaceflight program was sanctioned in February 2009. Initially, the first unmanned flight of the Orbital Vehicle was expected to be in 2013.
ISRO based the Orbital Vehicle on the design of the SRE. ISRO had launched and recovered the 550-kg Space Recovery Capsule in January 2007. The full-scale manned OV spaceship was said to be derived from this, although ISRO's published concept showed a more elongated conical shape than the SRE.
The OV is a fully autonomous three-ton capsuled spacecraft designed to carry a 3 member crew to orbit and safely return to the Earth after a mission duration of few orbits to two days.
The space capsule will have life control and environment control systems. It will be equipped with emergency mission abort and emergency escape that can be done at the first stage and second stage of the rocket. The illustration of the spacecraft showed a main engine and smaller orientation engines arranged in a light package around the base of the capsule, indicating an earth-orbit maneuvering capability was to be included. The nose of the original version of the OV was free for a docking mechanism, but primary entry was evidently through a side hatch secured by explosive bolts.
About 16 minutes after liftoff from the Satish Dhawan Space Centre (SDSC), Sriharikota, the rocket will inject the OV into an orbit 300–400 km from the Earth. The capsule would return for a splashdown in the Bay of Bengal.
While many technological elements to put together a manned flight are already available, ISRO would need to develop many new and novel technologies to ensure a foolproof life-support system, safety, reliability and an escape system for the crew. And in order to perfect the reentry techniques considered crucial for a manned flight, ISRO is planning to carry out three more flights of Space Recovery Capsules (SRE) and few unmanned flights of the OV spaceship.
Funding and Infrastructure
Development of a fully autonomous orbital vehicle to carry a two-member crew into a low Earth orbit has begun. ISRO sources said the flight is likely to be in 2016. The government has allocated 500 million (US$10 million) for pre-project initiatives for 2007 through 2008. A manned mission into space would require about 124 billion (US$3 billion) and a period of seven years. The Planning Commission estimates that a budget of 50 billion (US$1 billion) is required for initial work of the manned mission during the Eleventh Five-Year Plan (2007–12). The project report prepared by ISRO has been cleared by the space commission. In February, 2009 the Government of India has given the green signal for the Manned Space flight Program due to launch in 2016.
MC Dathan, director of Satish Dhawan Space Centre (SDSC), stated that ISRO will set up a full-fledged training facility in Bangalore for training astronauts. ISRO is also planning to build a third launch pad at Sriharkota for manned missions with extra facilities like entry into the crew capsule and an escape chute.
In spring 2009 the full-scale mock-up of crew capsule of OV was built and delivered to Satish Dhawan Space Centre for training of astronauts.
In January 2010, it was announced that the ISRO OV would be launched with astronauts into space around 2016. However, in April 2012 it was reported that funding problems placed the future of the project in serious doubt; and in August 2013, it was announced that all manned spaceflight efforts by India had been designated as being 'off ISRO's priority list'.
However, by early 2014 the project had been reconsidered, and was one of the main beneficiaries of a substantial budget increase announced in February. Just prior to this, in January 2014, the ISRO Chairman revealed that the OV would be tested in flight in 2014. Like the SRE-1 mission, the vehicle would also splashdown in the Bay of Bengal.
On 13 February 2014, Hindustan Aeronautics Limited handed over the first Crew Module structural assembly to ISRO. ISRO's VSSC would equip the Crew Module with systems necessary for crew support, navigation, guidance and control systems. ISRO plans to undertake an unmanned test launch of the vehicle aboard the GSLV Mk3 X1 experimental sub-orbital flight in July 2014. This launch will test orbital injection, separation and re-entry procedures and systems of the Crew Capsule. This is most likely to include capsule separation, heat shields and aero-braking systems, deployment of parachute, retro-firing, splashdown, flotation systems and procedures to recover the Crew Capsule from the Bay of Bengal.
- Indian human spaceflight program
- Geosynchronous Satellite Launch Vehicle
- GSLV Mk III
- Space exploration
- Human spaceflight
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- Orbital Vehicle
- ISRO eyes a manned Moon mission by 2015, awaiting Govt approval
- Towards an Indian manned flight
- Eleventh Five year Plan (2007-12) proprosals for Indian space program
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- Human space flight prog: HAL hands over crew module assembly to ISRO | Business Line
- India to test human crew space module