Computer, Slide Rule, True Airspeed

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Object Details

Manufacturer

G. Felsenthal & Sons Inc.

Summary

This is a special purpose slide rule, which was used by pilots to determine true airspeed, based on indicated air speed, altitude, and other instrument readings. It is typical of the many specialized slide rules used for air navigation and flight management, before the advent of electronic calculators and satellite-based navigation systems.

The slide rule was found with a collection of paper archives that were donated to the Smithsonian in 1957.

Credit Line

Bequest of the Estate of E.L. Jones

Inventory Number

A19970199000

Restrictions & Rights

Usage conditions apply

Type

INSTRUMENTS-Computers, General Purpose

Materials

Plastic

Ink

Steel

Non-Magnetic Metal Alloy

Paint

Dimensions

3-D (Diameter x Depth): 0.6 × 20.3cm (1/4 × 8 in.)

Storage: 25.4 × 5.7 × 25.4cm (10 in. × 2 1/4 in. × 10 in.)

Country of Origin

United States of America

See more items in

National Air and Space Museum Collection

Data Source

National Air and Space Museum

Metadata Usage

Not determined

Link to Original Record

http://n2t.net/ark:/65665/nv95dadfa75-a737-4afe-8300-d0cf39de280c

Record ID

nasm_A19970199000