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Hello,

I guess I should introduce myself, somewhat.

Am a retired research engineer, and have always been interested in
navigation, but, unfortunately, more on the theoretical than the
actual "doing" side.

However, I did complete the two celestial navigation courses given
many, many, years ago by the U.S. Power Squadron, which included the
taking of many sextant sites.  Can't remember when i enjoyed any
courses more.

I don't really have the opportunity to inspect any sextants now
firsthand, but am quite interested in how these folks did, and
presently are, designing and fabrication the pivots for the arms.

Are they just a bored, and subsequently honed, hole for a steel pin ?

Is it a cylindrical hole, or tapered ?

Is there any "preload" to minimize wobble or looseness with wear ?

Different mfg's doing it differently ? In the past ?

Any good detailed pix available ?
etc.

Great Group; have learned much.

Regards,
Bob   (Sudbury, Mass., USA)


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