Indian GSLV rocket now taller, heavier
December 17th, 2010 - 3:51 pm ICT by IANS
Chennai, Dec 17 (IANS) India’s geosynchronous satellite launch vehicle (GSLV), scheduled to blast off Monday with an advanced communication satellite (GSAT-5P), is now taller by two metres and heavier by four tonnes as compared to its standard configuration.The Indian Space Research Organisation’s standard configuration for the GSLV rocket is a height of 49 metres and 414 tonnes in weight at lift-off.
The rocket that would lift off Monday stands 51 metres tall and weighs 418 tonnes.
P.S. Veeraraghavan, director of the Vikram Sarabhai Space Centre, told IANS: “This time the fuel quantity for the cryogenic engine has increased and its thrust power has also gone up. The rocket will be carrying a heavier satellite (GSAT-5P) weighing 2,310 kg.”
The Russian made cryogenic engine will be powered with 15.2 tonnes of fuel (liquid hydrogen as fuel and liquid oxygen as oxidizer), an increase of around three tonnes, and the engine’s length has also increased.
The rocket has a bigger heat shield - four-metres in diameter and made of fibre reinforced plastic (FRP) - as compared to the standard configuration of 3.4-metre diameter made of aluminium alloy metal.
With the changes in rocket’s configuration, necessary calibrations have been carried out in the rocket’s navigational systems, control dynamics and aerodynamics so that the flight is smooth and the mission is successful, a source associated with ISRO told IANS.
Over the years, the carrying capacity of the GSLV has also increased — from 1,530 kg in 2001 for GSAT-1 to 2,220 kg for GSAT-4 in April 2010.
The latest has a payload of 2,310 kg with 36 transponders — an automatic receiver and transmitter of communication or broadcast signals. Successful launch of the satellite will take the agency’s transponder capacity to around 235 from 200 in orbit now.
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Tags: aluminium alloy, broadcast signals, communication satellite, control dynamics, cryogenic engine, fuel quantity, geosynchronous satellite, gslv rocket, heat shield, hydrogen as fuel, indian space research, indian space research organisation, launch vehicle, liquid hydrogen, liquid oxygen, metre diameter, navigational systems, reinforced plastic, transponder capacity, vikram sarabhai space centre