Gordon Cooper's personally-owned and -used F-86F range computer, measuring 4.5″ in diameter, signed on one side in blue felt tip, "Gordon Cooper." The circular instrument boasts multiple rotating discs, and could be used to quickly compute air speed, climb rate, and other parameters pertaining to piloting the North American F-86 Sabre fighter jet. In fine condition. Accompanied by a letter of provenance signed by Cooper, in full: "This was my F-86F Range Computer I used while flying F-86 jet aircraft during the early part of my Air Force career in the 1950s. I used it to compute values such as fuel range and flight air speed while in flight. Many of the printed numbers and letters have worn away due to my repeated use. It slowly developed a warped shape due to storage in my flight suit and exposure to sunlight in the cockpit."
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