History of the Distance Computer

The distance computer that we have been using is simple type of circular slide rule. This is the kind of device that people like engineers and pilots regularly used before pocket electronic calculators were developed.

The E6-B Flight Computer

The picture below shows an example of a flight computer.  Similar devices were produced in great numbers for the U.S. Army Air Corps in World War II, and they were given the Army designation E6-B.  They have continued to be used by pilots since then.  Airliners and corporate aircraft now have digital instruments that perform the same functions, but most pilots still have an E6-B somewhere in the bottom of their flight bag for use in case the digital instruments fail.

An E6-B flight computer


The Engineering Slide Rule

Slide rules were also made in a linear, rather than circular design.  The picture below shows part of a classic K&E engineering slide rule made in the late 1960s.

A K&E engineering slide rule


This is the end of the trail.  Back to base camp.

(Unless you want to know how the distance computer really works. But you can't get to that secret until you have studied Algebra.)  Yes I have studied Algebra and I want to know the secret.


 
 

Scouts Using the Internet Cartoon - Courtesy of Richard Diesslin - Click to See More Cartoons
© 1994-2014 - U.S. Scouting Service Project | Site Map | Disclaimer | Project Team | Web Stats | Contact Us | Privacy Policy

Materials found at U. S. Scouting Service Project, Inc. Websites may be reproduced and used locally by Scouting volunteers for training purposes consistent with the programs of the Boy Scouts of America (BSA) [Links to BSA Sites], the World Organization of the Scout Movement (WOSM) or other Scouting and Guiding Organizations. No material found here may be used or reproduced for electronic redistribution or for commercial or other non-Scouting purposes without the express permission of the U. S. Scouting Service Project, Inc. (USSSP) or other copyright holders. USSSP is not affiliated with BSA or WOSM and does not speak on behalf of BSA or WOSM. Opinions expressed on these web pages are those of the web authors. You can support this website with in two ways: Visit Our Trading Post at www.ScoutingBooks.com or make a donation by clicking the button below.
(U.S. Scouting Service Project Donation)


(Ruth Lyons Memorial Donations)