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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Starmaster slide rule on ebay
From: Brad Morris
Date: 2019 Nov 28, 00:42 -0500
From: Brad Morris
Date: 2019 Nov 28, 00:42 -0500
What was interesting, to me anyway, was that the company that produced the device was called the Spiral Slide Rule Co, when it is completely obvious that it isn't a spiral at all. It is concentric circles with odd connecting ramps.
Does that lead to loss of accuracy? Did the company skew the values on the ramp? Exactly what does it solve? How does it do it? These old analog calculators have a certain charm.
Should be interesting. I look forward to the investigation
Brad
On Thu, Nov 28, 2019, 12:17 AM Frank Reed <NoReply_FrankReed@fer3.com> wrote:
The photos with the original auction included the instructions on the back. They're not perfect, but clear enough.
Is this device a prototype? We can assume it sold poorly, or not at all, yes?
Frank Reed
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