The Space Production Calculator was designed by the Flight Propulsion Laboratory Department of the General Electric Company. The manufacturer and year of production are unknown. The calculator is 7.125 inches in diameter and consists of three plastic disks. It is described as a valuable engineering tool for swiftly computing a number of engineering characteristics of propulsion systems for space vehicles.
Note the reference to chemical rockets, nuclear rockets, plasma jets, and ion and magnetronhydrodynamic propulsion.
The window shows the hours in a day, days in year, distance from Sun, Mass as multiples of Earth’s mass and radius in 100s of miles.
The wallet, with instructions and diagram inside, is 7.125 inches square.
The calculator was perhaps given to GE’s own engineers and those at client and associated companies. The number distributed is unknown but it is very rare.
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