Dead Reckoning, E-6B, Prototype

Two sliding discs turned speed, wind, and compass readings into a heading and ground speed for a pilot or navigator.

Date

1942

Maker

G. Felsenthal & Sons Inc.

Place

United States of America

Materials

Painted and engraved acetate, plated copper alloy, and cellulose nitrate.

Dimensions

3-D: 23.8 x 12.4 x 1.3cm (9 3/8 x 4 7/8 x 1/2 in.)

Museum

National Air and Space Museum

Credit line

Gift of Ben W. Rau

Slide: yellow with green radials, computer: black plastic.

The museum's own record (Smithsonian, National Air and Space Museum)

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