Dalton Model E-1B Dead Reckoning Computer

In 1933 Weems helped Philip Dalton develop a series of highly successful aeronautical dead reckoning computers. One side was a circular computer for time-distance-speed calculations. The reverse was a double drift plotter for solving the wind triangle.

Caption:
This 1933 computer solved wind drift and time-speed-distance problems.
Type: Artifact
Image Date: January 4, 2013
Credit: National Air and Space Museum, Smithsonian Institution
Origin: National Air and Space Museum, Smithsonian Institution
Creator: Eric Long
NASM2013-00140
Navigation Methods
 
This 1933 computer solved wind drift and time-speed-distance problems.
This 1933 computer solved wind drift and time-speed-distance problems.