NASA's IRVE-3 Heat Shield Test Flight a Success
July 24, 2012 4:30 PM
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IRVE-3 embarked on a 20-minute test flight, where it was launched by a three-stage Black Brant rocket at 7:01 a.m. on Monday
NASA recently had a successful test flight for its Inflatable Reentry Vehicle Experiment (IRVE-3) heat shield.
IRVE-3 is a 680-pound cone-shaped, inflatable heat shield that is covered with heat-resistant materials. The idea behind IRVE-3 is to protect space capsules as they
enter or return an atmosphere
at hypersonic speeds. It is the successor to IRVE-2, which was an inflatable heat shield of the same size, but carried a lighter payload and was subjected to lower re-entry heat than IRVE-3.
IRVE-3 embarked on a 20-minute test flight, where it was launched by a three-stage Black Brant rocket at 7:01 a.m. on Monday. It took off from NASA's Wallops Flight Facility on Wallops Island, Virginia.
Six minutes into the flight, the heat shield and its large payload detached from the rocket's nose cone (kind of like a mushroom) over 200 miles above the Atlantic Ocean. Nitrogen was pumped into the IRVE-3 using an inflation system. This caused IRVE-3 to inflate about 10-feet in diameter.
From there, the heat shield dropped through Earth's atmosphere and managed to hold its shape through the heat and force of re-entry. NASA researchers were able to collect information like pressure and temperature data via tools onboard, which will help with future improvements of the heat shields.
IRVE-3 ended its flight by splashing down into the Atlantic Ocean near North Carolina. It will be retrieved by a U.S. Navy Stiletto boat.
"It's great to see the initial results indicate we had a successful test of the hypersonic inflatable aerodynamic decelerator," said James Reuther, deputy director of NASA's Space Technology Program. "This demonstration flight goes a long way toward showing the value of these technologies to serve as atmospheric entry heat shields for
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7/26/2012 10:32:37 AM
Of course, thinner atmosphere means higher terminal velocity.
If it was the opposite and returning to Earth under the same scenario would the craft still reach hypersonic speeds in the upper atmosphere from acceleration due to gravity, or max out at somewhere around normal supersonic speeds due to air resistance, which would be more manageable in terms of heat generation and parachute braking ability?
"So if you want to save the planet, feel free to drive your Hummer. Just avoid the drive thru line at McDonalds." -- Michael Asher
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