This device contains gyroscopes, accelerometers, and other equipment to provide a "stable platform" for the Apollo 15 Command Module. A stable platform is a reference point, from which the astronauts could perform calculations for navigation, guidance, and control from Earth orbit to the Moon and back.

Apollo 15, crewed by astronauts Dave Scott, Al Worden, and James Irwin, was the fourth Apollo mission to the lunar surface, in July, 1971.

Transferred from NASA to the Museum in 1977.

Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Object Details

Country of Origin

United States of America

Type

INSTRUMENTS-Navigational

Manufacturer

AC Spark Plug Division, General Motors Corporation

Dimensions

Overall: 13 in. tall x 10 1/2 in. diameter spheroid (33.02 x 26.67cm)

Materials

Case: metal, probably aluminum
Gyroscopes: other metals

Inventory Number

A19770224000

Credit Line

Transferred from National Aeronautics and Space Administration

Data Source

National Air and Space Museum

Restrictions & Rights

Usage conditions apply
For more information, visit the Smithsonians Terms of Use.