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Apollo Heat Shield Uncrated After 35 Years, Will Help with Orion CEV

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NASA scientists developing the next generation of exploration vehicles and heat shields for NASA’s Orion Crew Exploration Vehicle experienced “Christmas in July” when they uncrated the heat shields used on the Apollo missions some 35 years ago. These shields now are being analyzed to help with the development and engineering process.

Teams of NASA scientists and engineers working on the Orion Crew Exploration Vehicle Thermal Protection System Advanced Development Project went to the Smithsonian Institution’s National Air and Space Museum Garber Facility in Suitland, Md. The Garber Facility curators and conservators collect, preserve and restore all things air and space. This includes airplanes, spacecraft, and spacesuits.

The Orion teams included members from both NASA’s Goddard Space Flight Center in Greenbelt, Md., and NASA Ames Research Center, Moffett Field, Calif.

“We started working together at the end of June to track down any Apollo-era heat shields that they had in storage,” said Elizabeth (Betsy) Pugel of the Detector Systems Branch at NASA Goddard. “We located one and opened it. It was like a nerd Christmas for us!”

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The Orion team was interested in the archived heat shield material because it included an Apollo heat shield that flew into Low Earth Orbit and returned to Earth on August 26, 1966.

“We are examining the design of the carrier structure (the metal structure that connects the heat shield to the vessel that contains the astronauts) and the heat shield material’s thermal response,” Pugel said.

“The Smithsonian has been generous in their providing large pieces of the heat shield that we will be doing destructive and non-destructive testing on during the months before Orion’s Preliminary Design Review,” said Matthew Gasch, a research scientist at NASA Ames. “This information will further our confidence in our design and materials development.”

Orion will be capable of carrying crew and cargo to the space station. It will be able to rendezvous with a lunar landing module and an Earth departure stage in low-Earth orbit to carry crews to the moon and, one day, to Mars-bound vehicles assembled in low-Earth orbit.

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Orion will be the Earth entry vehicle for lunar and Mars returns. Orion’s design will borrow its shape from the capsules of the past, but takes advantage of 21st century technology in computers, electronics, life support, propulsion and heat protection systems.

Making its first flights early in the next decade, Orion is part of the Constellation Program to send human explorers back to the moon, and then onward to Mars and other destinations in the solar system.


SPACE WALLPAPER: STS-121 Discovery TPS Inspection

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Space Shuttle Discovery (STS-121) approaches the International Space Station for docking but before the link-up occurred, the orbiter “posed” for a series of Thermal Protection System  (TPS)  inspection photos.

The Leonardo Multipurpose Logistics Module can be seen in the shuttle’s cargo bay.

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Columbia Arrives at KSC after roll over from the Orbiter Maintenance and Refurbishment Facility

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Technicians monitor Columbia as it is towed via its landing gear by a ground handling vehicle. The Orbital maneuvering system (OMS) pods and space shuttle main engines (SSMEs) have been removed. Protective covers are visible on SSME ports and dome heatshield. Note the lack of TPS tiles under the payload bay doors and above the US flag.


Looking up at a Shuttle Landing

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(Above) Columbia STS-2 lands at Edwards Air Force Base, California. This view provides an amazing view of the high temperature protection materials that are exposed to friction on atmospheric entry. Note the trails of smoke from wing tips.


FAST FACTS: STS-27 TPS Damage

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Space Shuttle Atlantis’ Thermal Protection System (TPS) tiles sustained severe damage during the STS-27 flight. Upon landing, over 700 damaged tiles were noted, and one tile was missing.  Luckily for the crew the missing tile was located over a dense aluminum mounting plate for the L-band antenna.

This was the worst case of TPS damage ever incurred on a shuttle flight until the tragic loss of Columbia in 2003.

STS-27 was only the second flight after the 1986 Challenger Disaster.


Space Shuttle Wind Tunnel Testing

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This 36 percent scale model of the Space Shuttle ( 44 feet long) , photographed above, was fabricated and tested in  Ames 40-foot by 80-foot wind tunnel to identify the influence of the TPS on the orbiters’ low-speed aerodynamics.

Currently this model is displayed in front of the former Ames Visitor Center, Moffett Field, Ca.


Space Shuttle Thermal Protection System Image Collection

Space Shuttle Discovery’s underside thermal protection tiles are featured in this image collection. It’s all about the tiles.

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Shuttle Discovery TPS Gap Filler Removal

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Astronaut Stephen K. Robinson, STS-114 mission specialist, on the end of the station’s Canadarm2 (out of frame), slowly and cautiously makes his way to the underside of Space Shuttle Discovery to remove gap fillers from between the orbiter’s heat-shielding tiles during the mission’s third session of extravehicular activity.


Waterproofing the Space Shuttle

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After each flight, the orbiter’s external Thermal Protection System is rewaterproofed. Dimethylethoxysilane is injected into the tiles through an existing hole in the surface coating with a needleless gun, and the blankets are injected by a needle gun. The procedure must be done each time because the waterproofing material burns out at 1,100 degrees F., thus exposing the outer surface of the thermal system to water absorption.


FAST FACTS: Cost of a Single Shuttle TPS Tile

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FACT: A single coated tile can cost as much as $2,000 (1989 Dollars)


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