SCHIRRA'S MERCURY REDSTONE PAD BLUEPRINT.
"Hunts Hangar & Redstone Pad Routing Chart Schematic, Redstone Pad, Capsule 15, 16, & 17," blueprint, McDonnell Aircraft Corporation, Saint Louis, MO, c.1960. 12 x 39 inches. 1/3 scale of master drawing.
An outline drawing of the Mercury spacecraft illustrating the relative locations of onboard electrical components and their associated pad test cables. The locations of various "squib" and booster simulators are shown, plus an illustration of the pre-launch cooling assembly.
Included is a typed letter on WALLY SCHIRRA's personal stationery (with envelope) which reads in part: "Attached is an interesting blueprint diagram that we used back during my Mercury days. It is one of the many essential items such as manuals, checklists, diagrams, and charts that we Mercury astronauts used on a daily basis to prepare for flights into the unknown. This particular blueprint shows a representative outline of Mercury capsules 15, 16 and 17. We later used capsule (spacecraft or S/C) number 16 from my six orbit Sigma 7 flight during October 1962. There were a large number of tests performed on each Mercury vehicle by McDonnell personnel.... I have signed this blueprint and written my S/C number (16) on the right side of this blueprint."
Blueprint SIGNED by WALLY SCHIRRA and INSCRIBED "S/C #16."