E-6B Dead Reckoning Computer

Submitted by:

LaVone Kay

Location:

National Air and Space Museum, Smithsonian Institution

Aerial Dead Reckoning Computer – E-6B. U.S. Army Air Corps. Made by Keuffel & Esser Co., N.Y. No date, circa 1940-1941.

A refinement of the Dalton Mark VII Dead Reckoning Computer, the E-6B remains the most successful flight computer ever made.

Double-sided aluminum frame, 5-11/16″ diameter with flat sides, 4-7/8″ wide, two separate mounted wheels (one face mounted with center pivot; second one compass internally mounted annular ring with clear plastic window); black lettering and ruling; stiff white plastic slide insert with different red logarithmic scales on each side, 3″ wide x 9-3/8″ high.

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