Sonic Wind I Rocket Sled Seat

Straight metal seat attached to the middle of a rocket sled. Sonic Wild No 1 is painted on the vehicle.

The Sonic Wind 1 rocket sled, which was powered by nine solid fuel rockets with 40,000 pounds total thrust for five seconds. Air Force Lt. Col. John Stapp first rode the sled on March 19, 1954, at Holloman Air Force Base, New Mexico, and reached a speed of 613 feet per second. During acceleration, he was subjected to a force of 22 times that of gravity. Highlighted in this image is the seat of the Sonic Wind I Rocket Sled.