World Largest Heat Shield Attached to NASA's Orion Crew Capsule for Crucial Fall 2014 T... - 0 views
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technicians at the Kennedy Space Center (KSC) in Florida have attached the world’s largest heat shield to a pathfinding version of NASA’s Orion crew capsule
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One of the primary goals of NASA’s eagerly anticipated Orion EFT-1 uncrewed test flight is to test the efficacy of the heat shield in protecting the vehicle – and future human astronauts
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Orion is NASA’s next generation human rated vehicle now under development to replace the now retired space shuttle
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“The Orion heat shield is the largest of its kind ever built. Its wider than the Apollo and Mars Science Lab heat shields,” Todd Sullivan
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The ablative material will wear away as it heats up during the capsules atmospheric re-entry thereby preventing the 4000 degree F heat from being transferred to the rest of the capsule
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The Delta IV Heavy is the only rocket with sufficient thrust to launch the Orion EFT-1 capsule and its attached upper stage to its intended orbit of 3600 miles altitude above Earth
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15 times higher than the International Space Station (ISS) and farther than any human spacecraft has journeyed in 40 years
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At the conclusion of the two-orbit, four- hour EFT-1 flight, the detached Orion capsule plunges back and re-enters the Earth’s atmosphere at 20,000 MPH (32,000 kilometers per hour).
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“That’s about 80% of the reentry speed experienced by the Apollo capsule after returning from the Apollo moon landing missions,” Scott Wilson, NASA’s Orion Manager of Production Operations
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The big reason to get to those high speeds during EFT-1 is to be able to test out the thermal protection system
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Numerous sensors and instrumentation have been specially installed on the EFT-1 heat shield and the back shell tiles to collect measurements of things like temperatures, pressures and stresses during the extreme conditions of atmospheric reentry
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flight will aid in confirming. or refuting, design decisions and computer models as the program moves forward to the first flight