Nav-Comp E6B  
Written by Accutron on 2017-07-03  

The Nav-Comp E6B is one of many iterations of the original E-6B / AN-C-74 "whiz wheel" flight computer, developed by Naval Reserve pilot Lt. Philip Dalton in the 1930s. First adopted by the U.S. Army in 1940, the E-6B is capable of estimating a wide range of flight parameters, including ground speed, fuel burn, wind correction and ETA. The E-6B is one of the few slide rules still in wide use, with metal, plastic and cardboard versions available from a wide range of manufacturers. The Nav-Comp E6B pictured here is constructed out of aluminum and nylon, and has lithographically applied scales.

In popular culture, the E-6B is probably best known for its anachronistic appearance in multiple episodes of the original Star Trek television series.

Nav-Comp E6B flight computer, obverse view.

E6B flight computer, reverse view.

This article is part of the [Slide Rules] exhibit.

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