In rec.aviation.piloting Mxsmanic wrote:

snip

A nice Pickett steel or bamboo circular slide rule would be ideal--one of the
rare situations in which a slide rule is probably superior to a calculator (no
electricity, extremely fast and easy to use, more than accurate enough for its
purpose, good at simplifying specific problems). Alas! Nobody seems to make
slide rules any more. I saw a few other circular slide rules at the pilot
store, but they all looked like the same thing in different materials,
although I didn't look that closely.

An E6 is nothing more than a specialized circular slide rule.

Back before calculators, when slide rules were common, there were
specialized slide rules for all sorts of things.


--
Jim Pennino

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