Country of Origin: United States of America
3-D Test: 35.6 x 22.9 x 25.4cm (14 x 9 x 10 in.)
Case: metal, possibly magnesium.
This system contained a set of gyroscopes that assisted in the guidance, navigation and control of the Gemini spacecraft. It was installed and flown on the Gemini 3 mission on March 23, 1965, piloted by Virgil Grissom and John Young.
A major difference between Project Gemini and its predecessor, Project Mercury, was its goal of changing the spacecraft's orbit and rendezvousing with other spacecraft. The Gemini spacecraft therefore required an on-board guidance capability that was much greater than Mercury's. This inertial system provided a stable platform, which provided information to an on-board digital computer. This information enabled the Gemini astronauts to maneuver their craft in space.
Transferred from NASA to the National Air and Space Museum in 1972.
Transfer from National Aeronautics and Space Admnistration