Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer Usage Conditions May Apply Usage Conditions Apply There are restrictions for re-using this media. For more information, visit the Smithsonian's Terms of Use page. IIIF provides researchers rich metadata and image viewing options for comparison of works across cultural heritage collections. More - https://iiif.si.edu View Manifest View in Mirador Viewer

A heat shield protected the two-man Gemini spacecraft against the enormous heat of reentry into the atmosphere beginning at a velocity of more than 27,500 kilometers (17,000 miles) per hour. Like those of other early human spacecraft, Gemini's heat shield derived from ballistic-missile warhead technology. The dish-shaped shield created a shock wave in the atmosphere that held off most of the heat. The rest dissipated by ablation: charring and evaporation of the shield's surface. Ablative heat shields are not reusable.

The ablative substance of the Gemini heat shield is a paste-like silicone elastomer material which hardens after being poured into a honeycomb form. In 1970 McDonnell-Douglas gave this unused heat shield to the Smithsonian on behalf of NASA.

 Display Status

This object is on display in Human Spaceflight at the Steven F. Udvar-Hazy Center in Chantilly, VA.

Human Spaceflight
Object Details
Country of Origin United States of America Type SPACECRAFT-Crewed-Parts & Structural Components Manufacturer McDonnell Aircraft Corp.
 Dimensions Overall: 7 ft. 8 in. diameter, 240 lb. (233.68cm, 108.9kg)
 Materials Base: Resin-impregnated fiberglass; Honeycomb filling: Dow-Corning DC-325 ablative material; Outer ring: Fiberite
 Alternate Name Gemini Heat Shield, Unablated Inventory Number A19781815000 Credit Line Transferred from the National Aeronautics and Space Administration through McDonnell Aircraft Corp. Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.