Some circular slide rules were made to look like pocket watches, while others were intended to promote particular businesses—Whitehead & Hoag and Perrygraf were especially influential …

The advantage of circular slide rules, is that the dimensions can be small enough to fit in your shirt pocket, yet have the scale resolution of a standard linear slide rule. Construction is simple as …

E6B-R Flight Computer Aviation Plotter - Circular Slide Rule for Pilots, Wind Triangle Calculator for Flight Planning & Training, Plastic Flight Ruler 6 Inch (E6B-R2)

This is a circular slide rule first created in the 1930s for aircraft pilots to help with dead reckoning. With the aid of scales printed on the frame it also helps with such miscellaneous tasks as …

Although many companies made circular rules, and they look different (e.g. flat plastic, pocket-watch types etc.), in fact there are only two types of rule: those with two disks and a single …

Slide rules were analog devices in which the number of significant digits were proportional to the size of the rule (and the smallest graduations that a typical person could resolve.)

Apr 14, 2007 · Below you will find a PostScript template and instructions for building your own pocket-sized circular slide rule, like the one pictured at left.

Step 1: Design the Slide Rule The first thing you'll need to do is design the rule. There are places on the internet that have templates for circular rules, but I wanted to design my own. It turned …

Jul 8, 2021 · These step-by-step instructions were derived from the Loga Model 30 Th circular slide rule (see Fig. 1). The inner circular scales and the pointer (cursor, runner) can be rotated …

Some circular slide rules were made to look like pocket watches, while others were intended to promote particular businesses—Whitehead & Hoag and Perrygraf were especially influential …