The sign accompanying the couch. It reads
John Glenn Training Couch
Astronauts in Project Mercury, the first U.S. human spaceflight program,
experienced very strong "g" forces during acceleration into space and
deceleration during reentry into the atmosphere—up to 11 times
Earth's gravity. To better withstand these forces, each astronaut had special
form-fitted couches made for their bodies. This couch was used by John H.
Glenn Jr., the first American to orbit the Earth, for "g" training in the
centrifuge at the Naval Air Development
Center in Johnsville, Pennsylvania, from 1959 to 1962.
To create the couch, a plaster cast was made of the astronaut's body in a
sitting position, then that form was used to make the couch out of fiberglass.
Transferred from NASA Manned Spacecraft