NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sextant on ebay
From: Herbert Prinz
Date: 2006 Sep 5, 23:31 -0500
Red wrote:
> "it is not often that you see a polished metal sextant. " Probably
> because it is greatly impractical. In the noon sunlight, it would burn
> your hands (bare metal) and blind you from glare spots.
Why would a highly reflectent polished surface get hotter than one that
is painted black? In fact, Plath tried to find a compromise between
reducing heat absorption and avoiding glare spots with a model that was
painted white.
Herbert Prinz
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From: Herbert Prinz
Date: 2006 Sep 5, 23:31 -0500
Red wrote:
> "it is not often that you see a polished metal sextant. " Probably
> because it is greatly impractical. In the noon sunlight, it would burn
> your hands (bare metal) and blind you from glare spots.
Why would a highly reflectent polished surface get hotter than one that
is painted black? In fact, Plath tried to find a compromise between
reducing heat absorption and avoiding glare spots with a model that was
painted white.
Herbert Prinz
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to NavList@fer3.com
To , send email to NavList-@fer3.com
-~----------~----~----~----~------~----~------~--~---
