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This circular slide rule gave approximate information on the design of deep space missions, showing the relationship among parameters such as payload weight, propellant weight, final spacecraft velocity, exhaust velocity, etc. It would not have been accurate enough for an engineer to use in planning a mission; they used detailed mathematical formulas, evaluated by digital computers. But the slide rule would have been very useful for managers, members of the trade press, news media, and government funding agencies, who needed to know the basics of a space mission.

Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Object Details
Country of Origin United States of America Type INSTRUMENTS-Computers, General Purpose Manufacturer Martin Denver
Dimensions 3-D: 15.2 × 11.4cm (6 × 4 1/2 in.)
Materials Paper
Ink
Inventory Number A20170085002 Credit Line Gift of Martin Corporation, Denver Division Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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