NASA tests inflatable heat shield
A prototype for a large inflatable heat shield that could one day be used for landing large payloads on Mars was tested successfully on July 23, 2012, surviving a hypersonic speeds through Earth鈥檚 atmosphere. The Inflatable Reentry Vehicle Experiment (IRVE-3) traveled at speeds up to 12,231 km/h (7,600 mph) after launching on a sounding rocket from NASA鈥檚 Wallops Flight Facility on Wallops Island, Virginia.
鈥淲e had a really great flight today,鈥� said James Reuther, deputy director of NASA鈥檚 Space Technology Program, after the test flight. 鈥淚nitial indications are we got good data. Everything performed as well, or better, than expected.
Watch the video from the flight below.
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IRVE-3 is a cone of uninflated high-tech rings covered by a thermal blanket of layers of heat resistant materials. NASA said the purpose of the IRVE-3 test was to show that a space capsule can use an inflatable outer shell to slow and protect itself as it enters an atmosphere at hypersonic speed during planetary entry and descent, or as it returns to Earth with cargo from the International Space Station. A larger version has been proposed for landing larger payloads on Mars, such as future human missions.
About 6 minutes into today鈥檚 flight, as planned, the 680-pound inflatable aeroshell, or heat shield, and its payload separated from the launch vehicle鈥檚 55 cm (22-inch)-diameter nose cone about 450 km (280 miles) over the Atlantic Ocean.
An inflation system pumped nitrogen into the IRVE-3 aeroshell until it expanded to a mushroom shape almost 3 meters (10 feet) in diameter. Then the aeroshell plummeted at hypersonic speeds through Earth鈥檚 atmosphere. Engineers in the Wallops control room watched as four onboard cameras confirmed the inflatable shield held its shape despite the force and high heat of reentry. Onboard instruments provided temperature and pressure data. Researchers will study that information to help develop future inflatable heat shield designs.
A Navy crew will attempt to retrieve the aeroshell.
鈥淚t鈥檚 great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator,鈥� said James Reuther, deputy director of NASA鈥檚 Space Technology Program. 鈥淭his demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for future space missions.鈥�
IRVE-3 is part of the听听within the Game Changing Development Program, part of NASA鈥檚 Space Technology Program.
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