F7U-3 Cutlass Flight Computer 1955

Here is a rare item:  a Flight Computer for the US Navy's F7U-3 Cutlass carrier-based jet fighter/bomber, made in 1955. It is a combination computer.

The first is the Rest Computer. The Rest Computer was designed for simple solution of level flight cruise control problems. It is a 3-disc circular slide rule.

On the reverse side is the combination Climb and Descent Tabulator. It is a 2-disc circular calculator.  It includes an interesting table "Fouled Deck Endurance Decision Chart" that includes when to go to one engine. 

Measures 7 inches diameter and is in very good condition given its age. A unique find indeed.