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Bangalore (PTI) Sep 07, 2006 A defect in a device meant to regulate propellant flow led to malfunctioning in the fourth strap-on stage, causing the failure of the July 10 GSLV mission that was to put India's heaviest satellite so far into orbit, a report of the 15-member Failure Analysis Committee said. The committee, headed by senior Isro scientist K Narayana, made the report public on Wednesday in the presence of Isro chairman G Madhavan Nair and a host of other senior Isro officials from around the country. The device was made by a private company that supplies parts to Isro. Outlining the findings and factors that caused the GSLV crash, Nair told reporters the device in question was a propellant regulator. The diameter of the propellant regulator, he said, exceeded design specification by 1 mm. The product delivered was 17 mm in diameter instead of 16 mm. This gap proved fatal for the GSLV mission, the chairman explained. As the regulator was bigger, there was a larger flow of propellant into a gas generator. The extra flow created higher operating pressure within the generator. This high pressure resulted in reduced water flow into the generator and consequently to a very high gas temperature. The high pressure and high gas temperature ultimately led to turbo pumps that feed propellant to the engines stopping. That's when one of the engines lost thrust. The engine was one of the four liquid propellant strap-on ones which take the rocket up and help guide it...
Source: Press Trust of India Related Links Rocket Science News at Space-Travel.Com
Model Rocket Contest Opens Registration
Arlington VA (SPX) Sep 08, 2006Students across America can now compete in the 2007 Team America Rocketry Challenge. Registration for the world's largest rocket contest began Sept. 6. Applications for the fifth-annual challenge are now available online, and are due by Nov. 15.
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